American crocodiles breed in late fall or early winter, engaging in drawn-out mating ceremonies in which males emit low-frequency bellows to attract females. Body size is more important than age in determining reproductive capabilities, and females reach sexual maturity at a length of about 2.8 m (9 ft 2 in). In February or March, gravid females will begin to create nests of sand, mud, and dead vegetation along the water's edge. Nest location is crucial, and with the correct amount of vegetation, the eggs will develop within a small temperature range. Because sex determination is temperature-dependent in crocodilians, slight aberrations in temperature may result in all-male or all-female clutches, which would possibly harm the health of the population. About one month later, when it is time to lay, the female will dig a wide hole diagonally into the side of the nest and lay 30 to 70 eggs in it, depending on her size. After laying, the female may cover the eggs with debris or leave them uncovered. The white, elongated eggs are 8 cm (3 in) long and 5 cm (2 in) wide, with a number of pores in the brittle shell.
During the 75- to 80-day incubation period, the parents will guard the nest, often inhabiting a hole in the bank nearby. Females especially have been known to guard their nests with ferocity. But in spite of these precautions, American crocodile eggs sometimes fall prey to raccoons (arguably the most virulent natural predator of crocodilian nests in the Americas), coatis, foxes, skunks or other scavenging mammals (including coyotes in Mexico and American black bears in southern Florida), as well as large predatory ants, crabs and vultures. In Panama, green iguanas were seen to dig up and prey on American crocodile eggs occasionally, although in several cases were caught by the mother American crocodile and eaten. Crocodilian eggs are somewhat brittle, but softer than bird eggs. Despite noticeable nest guarding during egg incubation, guarding of young after hatching seems to be minimal in this species.
This species exists mostly in tropical areas with distinct rainy seasons, and the young hatch near the time of the first rains of the summer (July–August) after the preceding dry season, and before the bodies of water where they live flood. In this stage of development of their young, mother American crocodiles exhibit a unique mode of parental care. During the hatching process, when the young American crocodiles are most vulnerable to predation, they will instinctively call out in soft, grunt-like croaks. These sounds trigger the female to attend to the nest, uncovering the eggs if they have been covered. Then she will aid the hatchlings in escaping their eggs and scoop them up with her mouth, carrying them to the closest water source.
The hatchlings, which are 24 to 27 cm (9+1⁄2 to 10+1⁄2 in) in length, have been reported to actively hunt prey within a few days of hatching. It is not uncommon for the mother to care for her young even weeks after they have hatched, remaining attentive to their calls and continuing to provide transportation. About five weeks after hatching, the young American crocodiles disband in search of their own independent lives. Most of them will not survive, being preyed upon by several types of raptorial birds, other reptiles, and large fishes (e.g., barred catfish, Atlantic tarpons, common snook and lemon sharks, boa constrictors, black spiny-tailed iguanas and spectacled caimans). Those that do survive grow rapidly, feeding on insects, fish and frogs. Additionally, some young American crocodiles feed on each other.


The Magellanic penguin (Spheniscus magellanicus) is a South American penguin, breeding in coastal Patagonia, including Argentina, Chile, and the Falkland Islands, with some migrating to Brazil and Uruguay, where they are occasionally seen as far north as Espirito Santo. Vagrants have been found in El Salvador, the Avian Island in Antarctica, Australia, and New Zealand. It is the most numerous of the Spheniscus penguins. Its nearest relatives are the African penguin, the Humboldt penguin, and the Galápagos penguins. The Magellanic penguin was named after Portuguese explorer Ferdinand Magellan, who spotted the birds in 1520. The species is listed as being of Least Concern by the IUCN.


Magellanic penguins travel in large groups when hunting for food. In the breeding season, these birds gather in large nesting colonies at the coasts of Argentina, southern Chile, and the Falkland Islands, which have a density of 20 nests per 100 m². The breeding season begins with the arrival of adult Magellanic penguins at the breeding colonies in September and extends into late February and March when the chicks are mature enough to leave the colonies. One of the largest of these colonies is located at Punta Tombo. Nests are built under bushes or in burrows. Two eggs are laid. Incubation lasts 39–42 days, a task which the parents share in 10- to 15-day shifts. The chicks are cared for by both parents for 29 days and are fed every two to three days. Normally, both are raised through adulthood, though occasionally only one chick is raised. A successful Magellanic is considered to be able to raise 0.7 chicks on average per breeding season.
Magellanic penguins lay eggs in warm places where the temperature remains over 20 °C.
The male and female penguins take turns hatching, as they forage far away from their nests. The males return from the sea on the day the second egg is laid to take their turn incubating The second eggs are generally larger and with higher temperature than the first egg. The first one is more likely to survive, but under some conditions both chicks may be raised successfully. Male and female Magellanic penguins overlap in the at-sea areas they use whilst foraging, and show only small difference in foraging behaviours during early chick-rearing.
Magellanic penguins mate with the same partner year after year. The male reclaims his burrow from the previous year and waits to reconnect with his female partner. The females are able to recognize their mates through their call alone.
Once the breeding season is complete, Magellanic penguins migrate north for the winter, where they feed in waters offshore from Peru and Brazil.


Magellanic penguins feed in the water, preying on cuttlefish, squid, krill, and other crustaceans, and ingest sea water with their prey. Their salt-excreting gland rids the salt from their bodies. Adult penguins can regularly dive to depths of between 20 m to 50 m deep in order to forage for prey. During the breeding season males and females have similar foraging and diving patterns as well as diet composition, however bone tissue analysis suggests that diets diverge post-season when limitations imposed by chick rearing are removed.
Magellanic penguins do not experience a severe shortage of food like the Galapagos penguins, because they have a consistent food supply being located on the Atlantic coast of South America. The presence of the large continental shelf in the Atlantic Ocean lets Magellanic penguins forage far from their breeding colony.
Jellyfish including species in the genera Chrysaora and Cyanea were found to be actively sought-out food items, while they previously had been thought to be only accidentally ingested. Similar preferences were found in the Adélie penguin, yellow-eyed penguin and little penguin.


Magellanic penguins are medium-sized penguins which grow to be 61–76 cm (24–30 in) tall and weigh between 2.7 and 6.5 kg (6.0 and 14.3 lb). The males are larger than the females, and the weight of both drops while the parents raise their young.
Adults have black backs and white abdomens. There are two black bands between the head and the breast, with the lower band shaped in an inverted horseshoe. The head is black with a broad white border that runs from behind the eye, around the black ear-coverts and chin, and joins at the throat. Chicks and younger penguins have grey-blue backs, with a more faded grey-blue colour on their chest. Magellanic penguins can live up to 25 years in the wild, but as much as 30 years in captivity. Captain Eo, a male Magellanic penguin at the San Francisco Zoo, died in 2022 at the age of 40.
Young birds usually have a blotched pattern on their feet, which fades as they grow up into adulthood. By the time these birds reach about ten years of age, their feet usually become all black.
Like other species of penguins, the Magellanic penguin has very rigid wings used to swim under water.


The large-billed tern (Phaetusa simplex) is a species of tern in the family Laridae. It belongs to the monotypic genus Phaetusa.
It is found in most of South America (east of the Andes and north of the Pampas). It has occurred as a vagrant in Aruba, Bermuda, Cuba, Panama and the United States.
Its natural habitats are rivers and freshwater lakes.
These birds are rarely found in the UK or in Canada, however, they do appear to enjoy flying individually.


The red-rumped parrot (Psephotus haematonotus), also known as the red-backed parrot or grass parrot, is a common bird of south-eastern Australia, particularly in the Murray-Darling Basin.


Red-rumped parrots can be found in pairs or flocks in open country with access to water. They avoid the coast and the wetter, more heavily wooded areas. Clearing of large tracts of forest and the provision of water for stock has probably extended their range. They are often seen in suburban parks and gardens. Their green plumage provides such a good camouflage in ankle length grasses that they can hide quite effectively until the viewer is only 10–20 metres away.
They spend a great deal of time feeding on the ground, and often call to one another with an attractive chee chillip chee chillip.


Like many parrots, red-rumped parrots nest in tree hollows or similar places, including fenceposts and stumps. They lay 3-6 white eggs around 2 or so centimetres. Breeding usually takes place in spring (September-November), however, in the dryer inland areas, breeding can occur at any time of year in response to rainfall.


The Karoo prinia or  spotted prinia (Prinia maculosa) is a small passerine bird. It is a resident breeder in South Africa, Lesotho and far southern Namibia.
It is a species of karoo scrub, fynbos and bracken covered slopes in semi-desert and mountains. The former eastern subspecies P. m. hypoxantha is now usually considered to be a separate species, the Drakensberg prinia, P. hypoxantha.


The Karoo prinia builds a thin-walled oval nest with a side entrance from green grass. It is well hidden deep inside a leafy shrub or bush. Breeding is from August to September in areas with winter rainfall, but later (up to December) elsewhere.
The Karoo prinia is usually seen in pairs or small groups, typically low in scrub, but sometimes perching on the top of a bush. It actively forages for small insects, with tail cocked and frequently swung side-to-side.


Loggerhead sea turtles spend most of their lives in the open ocean and in shallow coastal waters. They rarely come ashore besides the females' brief visits to construct nests and deposit eggs. Hatchling loggerhead turtles live in floating mats of Sargassum algae. Adults and juveniles live along the continental shelf as well as in shallow coastal estuaries. In the northwestern Atlantic Ocean, age plays a factor in habitat preference. Juveniles are more frequently found in shallow estuarine habitats with limited ocean access compared to non-nesting adults. Loggerheads occupy waters with surface temperatures ranging from 13.3–28 °C (56–82 °F) during non-nesting season. Temperatures from 27–28 °C (81–82 °F) are most suitable for nesting females.
Juvenile loggerheads share the Sargassum habitat with a variety of other organisms. The mats of Sargassum contain as many as 100 different species of animals on which the juveniles feed. Prey found in Sargassum mats may include barnacles, crab larvae, fish eggs, and hydrozoan colonies. Some prey, such as ants, flies, aphids, leafhoppers, and beetles, are carried by the wind to the mats. Marine mammals and commercial fishes, including tuna and mahi-mahi, also inhabit the Sargassum mats.


The loggerhead sea turtle is the world's largest hard-shelled turtle, slightly larger at average and maximum mature weights than the green sea turtle and the Galapagos tortoise. It is also the world's second largest extant turtle after the leatherback sea turtle. Adults have an approximate weight range of 80 to 200 kg (180 to 440 lb), averaging around 135 kg (298 lb), and a straight-line carapace length range of 70 to 95 cm (28 to 37 in). The maximum reported weight is 545 kg (1,202 lb) and the maximum (presumed total) length is 213 cm (84 in). The head and carapace (upper shell) range from a yellow-orange to a reddish brown, while the plastron (underside) is typically pale yellow. The turtle's neck and sides are brown on the tops and yellow on the sides and bottom.
The turtle's shell is divided into two sections: carapace and plastron. The carapace is further divided into large plates, or scutes. Typically, 11 or 12 pairs of marginal scutes rim the carapace. Five vertebral scutes run down the carapace's midline, while five pairs of costal scutes border them. The nuchal scute is located at the base of the head. The carapace connects to the plastron by three pairs of inframarginal scutes forming the bridge of the shell. The plastron features paired gular, humeral, pectoral, abdominal, femoral, and anal scutes. The shell serves as external armor, although loggerhead sea turtles cannot retract their heads or flippers into their shells.
Sexual dimorphism of the loggerhead sea turtle is only apparent in adults. Adult males have longer tails and claws than females. The males' plastrons are shorter than the females', presumably to accommodate the males' larger tails. The carapaces of males are wider and less domed than the females', and males typically have wider heads than females. The sex of juveniles and subadults cannot be determined through external anatomy, but can be observed through dissection, laparoscopy (an operation performed on the abdomen), histological examination (cell anatomy), and radioimmunological assays (immune study dealing with radiolabeling).
Lachrymal glands located behind each eye allow the loggerhead to maintain osmotic balance by eliminating the excess salt obtained from ingesting ocean water. On land, the excretion of excess salt gives the false impression that the turtle is crying. The urea content is high in Caretta caretta tears.
The skull is most easily distinguished from other sea turtles by having  maxillae that meet in the mid-line of the palate. The portion of skull behind the eyes is also relatively large and bulbous due to the extensive jaw muscles.


The loggerhead sea turtle (Caretta caretta), is a species of oceanic turtle distributed throughout the world. It is a marine reptile, belonging to the family Cheloniidae. The average loggerhead measures around 90 cm (35 in) in carapace length when fully grown.  The adult loggerhead sea turtle weighs approximately 135 kg (298 lb), with the largest specimens weighing in at more than 450 kg (1,000 lb). The skin ranges from yellow to brown in color, and the shell is typically reddish brown. No external differences in sex are seen until the turtle becomes an adult, the most obvious difference being the adult males have thicker tails and shorter plastrons (lower shells) than the females.
The loggerhead sea turtle is found in the Atlantic, Pacific, and Indian Oceans, as well as the Mediterranean Sea. It spends most of its life in saltwater and estuarine habitats, with females briefly coming ashore to lay eggs. The loggerhead sea turtle has a low reproductive rate; females lay an average of four egg clutches and then become quiescent, producing no eggs for two to three years. The loggerhead reaches sexual maturity within 17–33 years and has a lifespan of 47–67 years.
The loggerhead sea turtle is omnivorous, feeding mainly on bottom-dwelling invertebrates. Its large and powerful jaws serve as an effective tool for dismantling its prey. Young loggerheads are exploited by numerous predators; the eggs are especially vulnerable to terrestrial organisms. Once the turtles reach adulthood, their formidable size limits predation to large marine animals, such as large sharks.
The loggerhead sea turtle is considered a vulnerable species by the International Union for Conservation of Nature.
In total, 9 distinct population segments are under the protection of the Endangered Species Act of 1973, with 4 population segments classified as "threatened" and 5 classified as "endangered"
Commercial international trade of loggerheads or derived products is prohibited by CITES Appendix I.
Untended fishing gear is responsible for many loggerhead deaths. The greatest threat is loss of nesting habitat due to coastal development, predation of nests, and human disturbances (such as coastal lighting and housing developments) that cause disorientations during the emergence of hatchlings. Turtles may also suffocate if they are trapped in fishing trawls. Turtle excluder devices have been implemented in efforts to reduce mortality by providing an escape route for the turtles. Loss of suitable nesting beaches and the introduction of exotic predators have also taken a toll on loggerhead populations. Efforts to restore their numbers will require international cooperation, since the turtles roam vast areas of ocean and critical nesting beaches are scattered across several countries.


Female loggerheads first reproduce between the ages of 17 and 33, and their mating period may last more than six weeks. They court their mates, but these behaviors have not been thoroughly examined. Male forms of courtship behavior include nuzzling, biting, and head and flipper movements. Studies suggest females produce cloacal pheromones to indicate reproductive ability. Before mating, the male approaches a female and attempts to mount her, while she resists. Next, the male and female begin to circle each other. If the male has competitors, the female may let the males struggle with each other. The winner then mounts the female; the male's curved claws usually damage the shoulders of the female's shell during this process. Other courting males bite the male while he is attempting to copulate, damaging his flippers and tail, possibly exposing bones. Such damage can cause the male to dismount and may require weeks to heal.
While nesting, females produce an average of 3.9 egg clutches, and then become quiescent, producing no eggs for two to three years. Unlike other sea turtles, courtship and mating usually do not take place near the nesting beach, but rather along migration routes between feeding and breeding grounds. Recent evidence indicates ovulation in loggerheads is mating-induced.  Through the act of mating, the female ovulates eggs which are fertilized by the male. This is unique, as mating-induced ovulation is rare outside of mammals.  In the Northern Hemisphere, loggerheads mate from late March to early June. The nesting season is short, between May and August in the Northern Hemisphere and between October and March in the Southern Hemisphere.
Loggerheads may display multiple paternity. Multiple paternity is possible due to sperm storage. The female can store sperm from multiple males in her oviducts until ovulation. A single clutch may have as many as seven fathers, each contributing sperm to a portion of the clutch. Multiple paternity and female size are positively correlated. Two hypotheses explain this correlation. One posits that males favor large females because of their perceived higher fecundity (ability to reproduce). The other states, because larger females are able to swim more quickly to mating grounds, they have longer mating periods.
All sea turtles have similar basic nesting behaviors. Females return to lay eggs at intervals of 12–17 days during the nesting season, on or near the beach where they hatched. They exit the water, climb the beach, and scrape away the surface sand to form a body pit. With their hind limbs, they excavate an egg chamber in which the eggs are deposited.  The females then cover the egg chamber and body pit with sand, and finally return to the sea. This process takes one to two hours, and occurs in open sand areas or on top of sand dunes, preferably near dune grasses that the females can use to camouflage the nest. The nesting area must be selected carefully because it affects characteristics such as fitness, emergence ratio, and vulnerability to nest predators. Loggerheads have an average clutch size of 112.4 eggs.


The lesser grey shrike (Lanius minor) is a member of the shrike family Laniidae. It breeds in South and Central Europe and western Asia in the summer and migrates to winter quarters in southern Africa in the early autumn, returning in spring. It is a scarce vagrant to western Europe, including Great Britain, usually as a spring or autumn erratic.
It is similar in appearance to the great grey shrike Lanius excubitor and the Iberian grey shrike Lanius meridionalis being predominantly black, white and grey, with the males having pink-flushed underparts. It is slightly smaller than the great grey shrike, and has a black forehead and relatively longer wings. This species prefers dry open lowlands, and is often seen on telephone wires.
This medium-sized passerine eats large insects, especially beetles, butterflies, moths and grasshoppers. Like other shrikes it hunts from prominent perches and sometimes impales corpses on thorns or barbed wire as a "larder".


The lesser grey shrike hunts from a strategic post, wire or branch and primarily feeds on insects which it catches in the air or on the ground. The diet includes beetles, moths and butterflies, large flies, grasshoppers, crickets and millipedes. Some fruits such as cherries and figs are eaten to a limited extent. The bird occasionally impales freshly caught prey on thorns for use later, but this is done to a much lesser extent than by some other shrike species. It has been shown experimentally that this species only creates a larder when it is satiated and that prey items are seldom plentiful enough for this to be the case. The male has been observed to feed the female before starting to create a food store. Repeated experimental exposure of birds to a food surplus significantly increases the rate at which they impale freshly caught prey. Other causal factors in the failure of this species to hoard may be a shortage of suitable caching sites and the fact that the bird lacks practice in storing food and this constrains its learning ability.
The flight of the lesser grey shrike is low and somewhat undulating and it occasionally glides with extended wings. At the end of the flight it swoops upward to land on a new hunting perch. It then turns its head from side to side searching for prey. When on the ground it hops, but it normally only stays there for long enough to pick up an item of food. Like other shrikes, when excited it fans its tail and moves it up and down or from sided to side. It is pugnacious and will defend its nest with vigour and drive away larger birds.


The lesser grey shrike spends the summer in South and Central Europe and western Asia. It breeds in southern France, Switzerland, Austria, Czech Republic, Italy, the former Yugoslavia, Albania, Greece, Romania, Bulgaria and southern Russia. In Asia it breeds in the Middle East, its range extending as far as eastern Turkey and Iran. It is a vagrant to more northerly parts of Europe, usually in spring or autumn. Countries where it has been seen include Sweden, Finland, Denmark, United Kingdom, Netherlands, Belgium and northern France. It is a migratory species and winters in a broad belt across tropical southern Africa.
During the summer the lesser grey shrike inhabits open countryside, the edges of cultivated areas, heathland with scattered bushes and trees, gardens, coppices, woodland and roadside trees. In its winter quarters it is usually found in scrubland and among thorn trees.


The nest is often built in a roadside tree with good all-round visibility some 4 to 10 metres (13 to 33 ft) off the ground. It is built by both birds out of the stems of various flowering plants such as cudweed  (Gnaphalium) and (Filago), and thyme (Thymus), and lined with whisps of wool, hairs, roots and feathers. There are five to seven eggs in the clutch, usually bluish green blotched with greenish-brown. Sometimes the background colour is cream or buff with pinkish-brown blotches. Their average size is 26.1 by 18.2 millimetres (1.03 in × 0.72 in). Incubation lasts about fifteen days and is chiefly done by the female though both parents take part. They both feed the young which are ready to leave the nest after about fourteen days. There is usually a single brood.


The rusty blackbird (Euphagus carolinus) is a medium-sized blackbird, closely related to grackles ("rusty grackle" is an older name for the species). It is a bird that prefers wet forested areas, breeding in the boreal forest and muskeg across northern Canada, and migrating southeast to the United States during winter.
Formerly abundant, the rusty blackbird has undergone one of the most rapid declines of any abundant bird species in North America in recent years, for reasons that are not well understood.


They forage on wet ground or in shallow water, mainly eating insects, small fish and some seeds. Their most common mode of foraging is to vigorously flip leaves and rip at submerged aquatic vegetation. The mast of small-acorn producing oaks, such as willow oak, is also important. In some areas, the nuts of planted pecans are heavily used. They very rarely will attack small passerine birds, and have been known to kill species as large as the common snipe. They feed in flocks during migration and on the wintering grounds, sometimes joining other blackbirds, both often occurring in single species flocks. They more often roost with other blackbirds; some small roosts are in brushy vegetation in old fields and others are in massive mixed flocks—sometimes in the urban areas.
The species nests relatively early for a boreal forest bird. They linger in the boreal zone to complete their molt. Their autumn migration is slow, with birds often remaining in the northern states well into December; spring migration is much more rapid. The largest wintering concentrations are found in the lower Mississippi Valley, with smaller concentrations in the Piedmont and south Atlantic coastal plain.
Fairly quiet in fall migration and most of the winter, both males and females will sing (particularly on warm days) in the late winter and spring. The song consists of gurgling and high-pitched squeaks.


Their breeding habitat is wet temperate coniferous forests and muskeg across Canada and Alaska. Birds usually nest at the edge of ponds and wetlands with the cup nest located in a tree or dense shrub, often over the water. Emerging dragonflies and their larvae are important food items during the summer.
These birds migrate to the eastern and southeastern United States, into parts of the Grain Belt, sometimes straying into Mexico.


The lizards’ horns are used for defense to prevent snakes from being able to swallow the lizard. It primarily eats ants, especially harvester ants.


The San Diego horned lizard or Blainville's horned lizard (Phrynosoma blainvillii) is a species of phrynosomatid lizard native to southern and central California in the United States and northern Baja California in Mexico.


The red-tailed hawk (Buteo jamaicensis) is a bird of prey that breeds throughout most of North America, from the interior of Alaska and northern Canada to as far south as Panama and the West Indies. It is one of the most common members within the genus of Buteo in North America or worldwide. The red-tailed hawk is one of three species colloquially known in the United States as the "chickenhawk", though it rarely preys on standard-sized chickens. The bird is sometimes also referred to as the red-tail for short, when the meaning is clear in context. Red-tailed hawks can acclimate to all the biomes within their range, occurring on the edges of non-ideal habitats such as dense forests and sandy deserts. The red-tailed hawk occupies a wide range of habitats and altitudes, including deserts, grasslands (from small meadows to the treed fringes of more extensive prairies), coniferous and deciduous forests, agricultural fields, and urban areas. Its latitudinal limits fall around the tree line in the subarctic and it is absent from the high Arctic. Generally it favors varied habitats with open woodland, woodland edge and open terrain. It is legally protected in Canada, Mexico, and the United States by the Migratory Bird Treaty Act.
The 14 recognized subspecies vary in appearance and range, varying most often in color, and in the west of North America, red-tails are particularly often strongly polymorphic, with individuals ranging from almost white to nearly all black. The subspecies Harlan's hawk (B. j. harlani) is sometimes considered a separate species (B. harlani). The red-tailed hawk is one of the largest members of the genus Buteo, typically weighing from 690 to 1,600 g (1.5 to 3.5 lb) and measuring 45–65 cm (18–26 in) in length, with a wingspan from 110–141 cm (3 ft 7 in – 4 ft 8 in). This species displays sexual dimorphism in size, with females averaging about 25% heavier than males.
The diet of red-tailed hawks is highly variable and reflects their status as opportunistic generalists, but in North America, they are most often  predators of small mammals such as rodents of an immense diversity of families and species. Prey that is terrestrial and at least partially diurnal is preferred, so types such as ground squirrels are preferred where they naturally occur. Over much of the range, smallish rodents such as voles alternated with larger rabbits and hares often collectively form the bulk of the diet. Large numbers of birds and reptiles can occur in the diet in several areas, and can even be the primary foods. Meanwhile, amphibians, fish and invertebrates can seem rare in the hawk’s regular diet, but they are not infrequently taken by immature hawks. Red-tailed hawks may survive on islands absent of native mammals on diets variously including invertebrates such as crabs, as well as lizards or birds. Like many Buteo species, they hunt from a perch most often, but can vary their hunting techniques where prey and habitat demand it. Because they are so common and easily trained as capable hunters, in the United States they are the most commonly captured hawks for falconry. Falconers are permitted to take only passage hawks (which have left the nest, are on their own, but are less than a year old) so as to not affect the breeding population. Adults, which may be breeding or rearing chicks, may not be taken for falconry purposes, and doing so is illegal. Passage red-tailed hawks are also preferred by falconers because these younger birds have not yet developed the adult behaviors that would make them more difficult to train.


Red-tailed hawks are considered partial migrants, as in about the northern third of their distribution, which is most of their range in Canada and Alaska, they almost entirely vacate their breeding grounds. In coastal areas of the north, however, such as in the Pacific Northwest  to southern Alaska and in Nova Scotia on the Atlantic, red-tailed hawks do not usually migrate. More or less, any area where snow cover is nearly continuous during the winter shows an extended absence of most red-tailed hawks, so some areas as far south as Montana may show strong seasonal vacancies of red-tails. In southern Michigan, immature red-tailed hawks tended to remain in winter only when voles were abundant. During relatively long,  harsh winters in Michigan, many more young ones were reported in northeastern Mexico. To the opposite extreme, hawks residing as far north as Fairbanks, Alaska, may persevere through the winter on their home territory, as was recorded with one male over three consecutive years. Birds of any age tend to be territorial during winter but may shift ranges whenever food requirements demand it. Wintering birds tend to perch on inconspicuous tree perches, seeking shelter especially if they have a full crop or are in the midst of poor or overly windy weather. Adult wintering red-tails tend to perch more prominently than immatures do, which select lower or more secluded perches. Immatures are often missed in winter bird counts, unless they are being displaced by dominant adults. Generally, though, immatures can seem to recognize that they are less likely to be attacked by adults during winter and can perch surprisingly close to them. Age is the most significant consideration of wintering hawks' hierarchy, but size does factor in, as larger immatures (presumably usually females) are less likely to displaced than smaller ones. Dark adult red-tailed hawks appear to be harder to locate when perched than other red-tails. In Oklahoma, for example, wintering adult Harlan's hawks were rarely engaged in fights or chased by other red-tails. These hawks tended to gather in regional pockets and frequently the same ones occurred year-to-year. In general, migratory behavior is complex and reliant on each individual hawk's decision-making (i.e. whether prey populations are sufficient to entice the hawk to endure prolonged snow cover). During fall migration, departure may occur as soon as late September, but peak movements occur in late October and all of November in the United States, with migration ceasing after mid-December. The northernmost migrants may pass over resident red-tailed hawks in the contiguous United States, while the latter are still in the midst of brooding fledglings. Not infrequently, several autumn hawk watches in Ontario, Quebec, and the northern United States record 4,500–8,900 red-tailed hawks migrating through each fall, with records of up to 15,000 in a season at Hawk Ridge hawk watch in Duluth, Minnesota. Unlike some other Buteo spp., such as Swainson's hawks and broad-winged hawks, red-tailed hawks do not usually migrate in groups, instead passing by one-by-one, and only migrate on days when winds are favorable. Most migrants do not move past southern Mexico in late autumn, but a few North American migrants may annually move as far south as breeding red-tailed hawks happen to occur, i.e. in Central America to as far south Panama. However, a few records were reported of wintering migrant red-tails turning up in Colombia, the first records of them anywhere in South America. Spring northward movements may commence as early as late February, with peak numbers usually occurring in late March and early April. Seasonal counts may include up to 19,000 red-tails in spring at Derby Hill hawk watch, in Oswego, New York, sometimes more than 5,000 are recorded in a day there. The most northerly migratory individuals may not reach breeding grounds until June, even adults.
Immature hawks migrate later than adults in spring on average, but not, generally speaking, in autumn. In the northern Great Lakes, immatures return in late May to early June, when adults are already well into their nesting season and must find unoccupied ranges. In Alaska, adults tend to migrate before immatures in early to mid-September, to the contrary of other areas, probably as heavy snowfall begins. Yearlings that were banded in southwestern Idaho stayed for about 2 months after fledging, and then traveled long distances with a strong directional bias, with 9 of 12 recovered southeast of the study area- six of these moved south to coastal lowlands in Mexico] and as far as Guatemala, 4,205 km (2,613 mi) from their initial banding. In California, 35 hawks were banded as nestlings; 26 were recovered at less than 50 miles away, with multidirectional juvenile dispersals. Nestlings banded in Southern California sometimes actually traveled north as far as 1,190 km (740 mi) to Oregon, ranging to the opposite extreme as far as a banded bird from the Sierra Nevadas that moved 1,700 km (1,100 mi) south to Sinaloa. Nestlings banded in Green County, Wisconsin, did not travel very far comparatively by October–November, but by December, recoveries were found in states including Illinois, Iowa, Texas, Louisiana, and Florida.


The red-tailed hawk is carnivorous, and a highly opportunistic feeder. Nearly any small animal they encounter may be viewed as potential food. Their most common prey are small mammals such as rodents and lagomorphs, but they also consume birds, reptiles, fish, amphibians, and invertebrates. Prey varies considerably with regional and seasonal availability, but usually centers on rodents, accounting for up to 85% of a hawk's diet. In total, nearly 500 prey species have been recorded in their diet, almost as many as  great horned owls have been recorded as taking. When 27 North American studies are reviewed, mammals make up 65.3% of the diet by frequency, 20.9% by birds, 10.8% by reptiles, 2.8% by invertebrates, and 0.2% by amphibians and fish. The geometric mean body mass of prey taken by red-tailed hawks in North America is about 187 g (6.6 oz) based on a pair of compilation studies from across the continent, regionally varying at least from 43.4 to 361.4 g (1.53 to 12.75 oz). Staple prey (excluding invertebrates) has been claimed to weigh from 15 to 2,114 g (0.033 to 4.661 lb), ranging roughly from the size of a small mouse or lizard to the size of a black-tailed jackrabbit (Lepus californicus). The daily food requirements range from 7 to 11.2% of their own body weight, so that about three voles or the equivalent weight are required daily for a typical range adult.
The talons and feet of red-tailed hawks are relatively large for a Buteo hawk; in an average-sized adult red-tail, the "hallux-claw" or rear talon, the largest claw on all accipitrids, averages about 29.7 mm (1.17 in). In fact, the talons of red-tails in some areas averaged of similar size to those of ferruginous hawks which can be considerably heavier and notably larger than those of the only slightly lighter Swainson's hawk. This species may exert an average of about 91 kg/cm² (1,290 lbf/in²) of pressure through its feet. Owing to its morphology, red-tailed hawks generally can attack larger prey than other Buteo hawks typically can, and are capable of selecting the largest prey of up to their own size available at the time of hunting, though in all likelihood numerically most prey probably weighs on average about 20% of the hawk's own weight (as is typical of many birds of prey). Red-tailed hawks usually hunt by watching for prey activity from a high perch, also known as still hunting. Upon being spotted, prey is dropped down upon by the hawk. Red-tails often select the highest available perches within a given environment, since the greater the height they are at, the less flapping is required and the faster the downward glide they can attain toward nearby prey. If prey is closer than average, the hawk may glide at a steep downward angle with few flaps, if farther than average, it may flap a few swift wingbeats alternating with glides. Perch hunting is the most successful hunting method generally speaking for red-tailed hawks and can account for up to 83% of their daily activities (i.e. in winter). Wintering pairs may join together and aseasonally may join forces to group hunt agile prey that they may have trouble catching by themselves, such as tree squirrels. This may consist of stalking opposites sides of a tree, to surround the squirrel and almost inevitably drive the rodent to be captured by one after being flushed by the other hawk.
The most common flighted hunting method for red-tail is to cruise around 10 to 50 m (33 to 164 ft) over the ground with flap-and-glide type flight, interspersed occasionally with harrier-like quarters over the ground. This method is less successful than perch hunting, but seems relatively useful for capturing small birds and may be show the best results while hunting in hilly country. Hunting red-tailed hawks readily use trees, bushes, or rocks for concealment before making a surprise attack, even showing a partial ability to dodge among trees in an Accipiter-like fashion. Among thick stands of spruce in Alaska, a dodging hunting flight was thought to be unusually important to red-tails living in extensive areas of conifers, with hawks even coming to the ground and walking hurriedly in prey pursuit especially if the prey was large, a similar behavior to goshawks. Additional surprisingly swift aerial hunting has reported in red-tails that habitually hunt bats in Texas. Here, the bat-hunting specialists  stooped with half-closed wings, quite falcon-like, plowing through the huge stream of bats exiting their cave roosts, then zooming upwards with a bat in its talons. These hawks also flew parallel closely to the stream, then veer sharply into it and seize a bat. In the neotropics, red-tails have shown the ability to dodge amongst forest canopy whilst hunting. In Kansas, red-tailed hawks were recorded sailing to catch flying insects, a hunting method more typical of a Swainson's hawk. Alternately, they may drop to the ground to forage for insects like grasshoppers and beetles as well as other invertebrates and probably amphibians and fish (except by water in the latter cases). Hunting afoot seems to be particularly prevalent among immatures. Young red-tailed hawks in northeastern Florida were recorded often extracting earthworms from near the surface of the ground and some had a crop full of earthworms after rains. Ground hunting is also quite common on Socorro Island, where no native land mammals occur, and invertebrates are more significant to their overall diet. A red-tailed hawk was observed to incorporate an unconventional killing method, which was drowning a heron immediately after capture. One red-tailed hawk was seen to try to grab a young ground squirrel and, upon missing it, screamed loudly, which in turn caused another young squirrel to break into a run, wherein it was captured. Whether this was an intentional hunting technique needs investigation. Upon capture, smaller prey is taken to a feeding perch, which is almost always lower than a hunting perch. Among small prey, rodents are often swallowed whole, as are shrews and small snakes, while birds are plucked and beheaded. Even prey as small as chipmunks may take two or three bites to consume. Larger mammals of transportable size are at times beheaded and have part of their fur discarded, then leftovers are either stored in a tree or fall to the ground. Large prey, especially if too heavy to transport on the wing, is often dragged to a secluded spot and dismantled in various ways. If they can successfully carry what remains to a low perch, they tend to feed until full and then discard the rest.


In most of the interior contiguous United States the first egg is laid between mid-March and early April, ranging from 3 to 5 weeks after the nest is constructed, with the clutch completed 2 to 5 days after the initial egg is laid. The average date of the laying the first egg can be variable: peaking mid-January in Puerto Rico, averaging 9 March in Arizona, 26 March in the Front Range Urban Corridor and 1 May in Alberta. The mean initiation of clutches may bump weeks later if 10 cm (3.9 in) or more of snow is still on the ground in Wisconsin during March. A clutch of one to three eggs is laid in March or April, depending upon latitude, with four eggs being uncommon and five and perhaps even six increasingly rare. Clutch size depends almost exclusively on the availability of prey for the adults. At the species level, body size also determines clutch size. For example, while the total clutch weighs up to 18% of the females weight and the clutch size averages 2 to 3, a larger raptor like the golden eagle lays a smaller clutch, usually not more than two, that weighs less than 10% in total of the female’s body mass, whereas a smaller raptor like the kestrel lays a larger clutch averaging five that weighs 50% of the females weight. Average clutch size vary from 1.96 in Alaska when prey populations were low up to 2.96 in Washington. Eggs are laid approximately every other day. Average egg sizes in height and width (each with a sample size of 20) are in the following subspecies- B. j. borealis: 59.53 mm × 47.49 mm (2.344 in × 1.870 in); B. j. calurus: 60.04 mm × 47.1 mm (2.364 in × 1.854 in); B. j. fuertesi: 59.42 mm × 46.99 mm (2.339 in × 1.850 in). The eggs of red-tailed hawks are mostly white, sometimes with a faint buffy wash; at times the eggs manifest a sparsely or heavily marked with blotches of buff, pale reddish-brown, dark brown, or purple. The markings often appear indistinctly and may combine to form a fine speckling. They are incubated primarily by the female, with the male substituting when she leaves to hunt or merely stretch her wings. Rarely do the males incubate more than four hours of daylight. The male brings most food to the female while she incubates.


Red-tailed hawk plumage can be variable, depending on the subspecies and the region. These color variations are morphs, and are not related to molting. The western North American population, B. j. calurus, is the most variable subspecies and has three main color morphs: light, dark, and intermediate or rufous. The dark and intermediate morphs constitute 10–20% of the population in the Western United States, but seem to constitute only 1–2% of B. j. calurus in western Canada. A whitish underbelly with a dark brown band across the belly, formed by horizontal streaks in feather patterning, is present in most color variations. This feature is variable in eastern hawks and generally absent in some light subspecies (i.e. B. j. fuertesi). Most adult red-tails have a dark-brown nape and upper head, which gives them a somewhat hooded appearance, while the throat can variably present a lighter brown "necklace". Especially in younger birds, the underside may be otherwise covered with dark-brown spotting, and some adults may too manifest this stippling. The back is usually a slightly darker brown than elsewhere with paler scapular feathers, ranging from tawny to white, forming a variable imperfect "V" on the back. The tail of most adults, which gives this species its name, is rufous brick-red above with a variably sized, black subterminal band and generally appears light buff-orange from below. In comparison, the typical pale immatures (i.e. less than two years old) typically have a mildly paler headed and tend to show a darker back than adults with more apparent pale wing-feather edges above (for descriptions of dark morph juveniles from B. j. calurus, which is also generally apt for description of rare dark morphs of other races, see under that subspecies description). In immature red-tailed hawks of all morphs, the tail is a light brown above with numerous small dark brown bars of roughly equal width, but these tend to be much broader on dark morph birds. Even in young red-tails, the tail may be a somewhat rufous tinge of brown. The bill is relatively short and dark, in the hooked shape characteristic of raptors, and the head can sometimes appear small in size against the thick body frame. The cere, the legs, and the feet of the red-tailed hawk are all yellow, as is the color of bare parts in many accipitrids of different lineages. Immature birds can be readily identified at close range by their yellowish irises. As the bird attains full maturity over the course of 3–4 years, the iris slowly darkens into a reddish-brown, which is the adult eye-color in all races. Seen in flight, adults usually have dark brown along the lower edge of the wings, against a mostly pale wing, which bares light brownish barring. Individually, the underwing coverts can range from all dark to off-whitish (most often more heavily streaked with brown) which contrasts with a distinctive black patagium marking. The wing coloring of adults and immatures is similar but for typical pale morph immatures having somewhat heavier brownish markings.
Though the markings and color vary across the subspecies, the basic appearance of the red-tailed hawk is relatively consistent.
Overall, this species is blocky and broad in shape, often appearing (and being) heavier than other Buteos of similar length. They are the heaviest Buteos on average in eastern North America, albeit scarcely ahead of the larger winged rough-legged buzzard (Buteo lagopus), and second only in size in the west to the ferruginous hawk (Buteo regalis). Red-tailed hawks may be anywhere from the fifth to the ninth heaviest Buteo in the world depending on what figures are used. However, in the northwestern United States, ferruginous hawk females are 35% heavier than female red-tails from the same area. On average, western red-tailed hawks are relatively longer winged and lankier proportioned but are slightly less stocky, compact and heavy than eastern red-tailed hawks in North America. Eastern hawks may also have mildly larger talons and bills than western ones. Based on comparisons of morphology and function amongst all accipitrids, these features imply that western red-tails may need to vary their hunting more frequently to on the wing as the habitat diversifies to more open situations and presumably would hunt more variable and faster prey, whereas the birds of the east, which was historically well-wooded, are more dedicated perch hunters and can take somewhat larger prey but are likely more dedicated mammal hunters. In terms of size variation, red-tailed hawks run almost contrary to Bergmann's rule (i.e. that northern animals should be larger in relation than those closer to the Equator within a species) as one of the northernmost subspecies, B. j. alascensis, is the second smallest race based on linear dimensions and that two of the most southerly occurring races in the United States, B. j. fuertesi and B. j. umbrinus, respectively, are the largest proportioned of all red-tailed hawks. Red-tailed hawks tend have a relatively short but broad tails and thick, chunky wings. Although often described as long-winged, the proportional size of the wings is quite small and red-tails have high wing loading for a buteonine hawk. For comparison, two other widespread Buteo hawks in North America were found to weigh: 30 g (1.1 oz) for every square centimeter of wing area in the rough-legged buzzard (B. lagopus) and 44 g (1.6 oz)/cm² in the red-shouldered hawk (B. lineatus). In contrast, the red-tailed hawk weighed considerably more for their wing area: 199 g (7.0 oz) per square cm.
As is the case with many raptors, the red-tailed hawk displays sexual dimorphism in size, as females are on average 25% larger than males. As is typical in large raptors, frequently reported mean body mass for red-tailed hawks is somewhat higher than expansive research reveals. Part of this weight variation is seasonal fluctuations; hawks tend to be heavier in winter than during migration or especially during the trying summer breeding season, and also due to clinal variation. Furthermore, immature hawks are usually lighter in mass than their adult counterparts despite having somewhat longer wings and tails. Male red-tailed hawks may weigh from 690 to 1,300 g (1.52 to 2.87 lb) and females may weigh  801 to 1,723 g (1.766 to 3.799 lb) (the lowest figure from a migrating female immature from Goshute Mountains, Nevada, the highest from a wintering female in Wisconsin). Some sources claim the largest females can weigh up to 2,000 g (4.4 lb), but whether this is in reference to wild hawks (as opposed to those in captivity or used for falconry) is not clear. The largest known survey of body mass in red-tailed hawks is still credited to Craighead and Craighead (1956), who found 100 males to average 1,028 g (2.266 lb) and 108 females to average 1,244 g (2.743 lb). However, these figures were apparently taken from labels on museum specimens, from natural history collections in Wisconsin and Pennsylvania, without note to the region, age, or subspecies of the specimens. However, 16 sources ranging in sample size from the aforementioned 208 specimens to only four hawks in Puerto Rico (with 9 of the 16 studies of migrating red-tails), showed that males weigh a mean of 860.2 g (1.896 lb) and females weigh a mean of 1,036.2 g (2.284 lb), about 15% lighter than prior species-wide published weights. Within the continental United States, typical weights of males can range from 840.8 g (1.854 lb) (for migrating males in Chelan County, Washington) to 1,031 g (2.273 lb) (for male hawks found dead in Massachusetts), and females ranged from 1,057.9 g (2.332 lb) (migrants in the Goshutes) to 1,373 g (3.027 lb) (for females diagnosed as B. j. borealis in western Kansas). Size variation in body mass reveals that the red-tailed hawk typically varies only a modest amount and that size differences are geographically inconsistent.
Male red-tailed hawks can measure 45 to 60 cm (18 to 24 in) in total length, females measuring 48 to 65 cm (19 to 26 in) long. Their wingspan typically can range from 105 to 141 cm (3 ft 5 in to 4 ft 8 in), although the largest females may possible span up to 147 cm (4 ft 10 in). In the standard scientific method of measuring wing size, the wing chord is 325.1–444.5 mm (12.80–17.50 in) long. The tail measures 188 to 258.7 mm (7.40 to 10.19 in) in length. The exposed culmen was reported to range from 21.7 to 30.2 mm (0.85 to 1.19 in) and the tarsus averaged 74.7–95.8 mm (2.94–3.77 in) across the races. The middle toe (excluding talon) can range from 38.3 to 53.8 mm (1.51 to 2.12 in), with the hallux-claw (the talon of the rear toe, which has evolved to be the largest in accipitrids) measuring from 24.1 to 33.6 mm (0.95 to 1.32 in) in length.


The booted warbler (Iduna caligata) is an Old World warbler in the tree warbler group. It was formerly considered to be conspecific with Sykes's warbler, but the two are now usually both afforded species status. Booted warbler itself breeds from central Russia to western China, and migrates to winter in the Indian subcontinent as far south as Sri Lanka. Booted warbler has expanded its breeding range westward in recent decades and nests now as far west and north as Finland.
It is a small passerine bird, found in open country with bushes and other tall vegetation. Three or four eggs are laid in a nest in a bush or vegetation.  Like most warblers they are insectivorous.
These are small warblers, especially compared to others in their genus. They are pale brown above and whitish below with buff flanks. The outer tail feathers have pale edges. They have a short pale supercilium, and the bill is strong and pointed. Sykes's warbler is larger and greyer than the booted warbler, and most resembles an eastern olivaceous warbler.
Keyserling and Blasius gave no explanation of the genus name Iduna, though in Norse mythology Iðunn, or Iduna, is the goddess of spring and fertility who was changed into a sparrow (or a nut) to enable her rescue by Loki. The specific caligata  is Latin for "booted" from caliga, "boot".


Their breeding habitat is the edges of conifer and mixed forests in mountainous regions of western North America, from southeastern Alaska and Yukon south to New Mexico. Their range is closely associated with that of various conifers. Their nest is a scrape on the ground concealed under a shrub or log.


They are permanent residents but move short distances by foot and short flights to denser forest areas in winter, with the odd habit of moving to higher altitudes in winter.


These birds forage on the ground, or in trees in winter. In winter, they mainly eat fir and douglas-fir needles, occasionally also hemlock and pine needles; in summer, other green plants (Pteridium, Salix), berries (Gaultheria, Mahonia, Rubus, Vaccinium), and insects (particularly ants, beetles, grasshoppers) are more important. Chicks are almost entirely dependent on insect food for their first ten days.


The black-faced cuckooshrike (Coracina novaehollandiae) is a common omnivorous passerine bird native to Australia and southern New Guinea. It has a protected status in Australia, under the National Parks and Wildlife Act, 1974.
They are widely distributed in almost any wooded habitat throughout the area, except in rainforests. But they can also occur in urban areas, and are a fairly common sight on power lines in Australian cities such as Sydney and Perth.


The diet consists of insects, their larvae, caterpillars or other invertebrates. These may be caught in flight, or caught when searching through the foliage. In addition, some fruits and seeds are also eaten.
Breeding season is chiefly from August to February each year. Both partners build the rather small nest. The fledglings leave the nest after about three weeks of hatching. They look like the adults, except the black facial mask is reduced to an eye stripe.
Outside the breeding season, they like to flock in groups of up to a hundred birds. Some may be partially migratory or may remain in the same territory. Lack of significant differences between regional populations in Australia makes it difficult to determine where populations move in winter.


The California scrub jay (Aphelocoma californica) is a species of scrub jay native to western North America. It ranges from southern British Columbia throughout California and western Nevada near Reno to west of the Sierra Nevada.  The California scrub jay was once lumped with Woodhouse's scrub jay and collectively called the western scrub jay. The group was also lumped with the island scrub jay and the Florida scrub jay; the taxon was then called simply scrub jay. The California scrub jay is nonmigratory and can be found in urban areas, where it can become tame and will come to bird feeders. While many refer to scrub jays as "blue jays", the blue jay is a different species of bird entirely.


California scrub jays usually forage in pairs, family groups, or small non-kin groups, outside of the breeding season. They feed on small animals, such as frogs and lizards, eggs and young of other birds, insects, and (particularly in winter) grains, nuts, and berries. They will also eat fruit and vegetables growing in backyards. They should not be hand-fed by humans.


True to its name, the California scrub jay inhabits areas of low scrub, preferring pinon-juniper forests, oak woods, and edges of mixed evergreen forests. It also inhabits suburban gardens.


The chicks start off fully gray. The older they get, the more they turn blue. On their heads, chicks tend to have a red crest that resembles a comb. The chick will lose its crest at day seven, just like the way the baby chickens lose their egg tooth at 5–7 days. Nests are built low in trees or bushes, 1–10 m (3.3–32.8 ft) above the ground, primarily by the female, while the male guards her efforts. The nests are sturdy, with an outside diameter of 33–58 cm (13–23 in), constructed on a platform of twigs with moss and dry grasses lined with fine roots and hair. Four to six eggs are laid from March through July, with some regional variations. There are two common shell color variations: pale green with irregular, olive-colored spots or markings; and pale grayish-white to green with reddish-brown spots. The female incubates the eggs for about 16 days. The young leave the nest about 18 days after hatching.


The California scrub jay is a medium-sized bird, approximately 27–31 cm (11–12 in) in length (including its tail), with a 39 cm (15 in) wingspan, and about 80 g (2.8 oz) in weight.  In general, this species has a blue head, wings, and tail; a gray-brown back; grayish underparts; and white eyebrows. The throat is whitish with a blue necklace. The call or "screech" is described as "harsh and scratchy".


The flame-rumped tanager (Ramphocelus flammigerus) is a species of bird in the family Thraupidae. It is found in semi-open forest and woodland.
The most widespread subspecies, icteronotus, is found in the Tumbes-Chocó-Magdalena in Panama, Colombia, Ecuador and Peru, and is sometimes considered a separate species, the lemon-rumped tanager (R. icteronotus). However, it is known to hybridize with the nominate subspecies from the Cauca Valley in Colombia.
Males of both subspecies have a mainly black plumage and a narrowly black-tipped pale bluish bill. The rump of the male P. f. icteronotus is yellow, while it is red in P. f. flammigerus. In females, the head, wings and tail are blackish-brown and the underparts are mainly yellow. The rump is yellowish in the female P. f. icteronotus, while the rump, vent and chest are orange-red in P. f. flammigerus.


The red-throated pipit (Anthus cervinus) is a small passerine bird,which breeds in the far north of Europe and the Palearctic, with a foothold in northern Alaska. It is a long-distance migrant, moving in winter to Africa, South and East Asia and the West Coast United States. It is a vagrant to Western Europe.


The red-throated pipit is native to the boreal regions of Northern Europe and Asia. The breeding habitat is open country including mountains, marshland, and tundra. The nest is built on the ground, often beside a tussock of grass, on rough grassland, or on a hummock in a marsh. It is made of dry grasses and sedges with a soft lining of reindeer hair or down. Four to six eggs are laid and incubated by the female for nearly two weeks. The young are fledged and ready to leave the nest about 12 days later. The red-throated pipit is insectivorous, like its relatives, but also eats seeds.


The European green woodpecker (Picus viridis) is a large green woodpecker with a bright red crown and a black moustache. Males have a red centre to the moustache stripe which is absent in females. It is resident across much of Europe and the western Palearctic but in Spain and Portugal it is replaced by the similar Iberian green woodpecker (Picus sharpei).
The European green woodpecker spends much of its time feeding on ants on the ground and does not often 'drum' on trees like other woodpecker species. Though its vivid green and red plumage is particularly striking, it is a shy bird, and is more often heard than seen, drawing attention with its loud calls. A nest hole is excavated in a tree; four to six eggs are laid which hatch after 19–20 days.


The main food of the European green woodpecker is ants of the genera Lasius and Formica for which it spends much of its time foraging on the ground, though other insects and small reptiles are also taken occasionally. The bird's distinctive, elongated, cylindrical droppings often consist entirely of ant remains. At ant nests, it probes into the ground and licks up adult ants and their larvae. They have tongues that wrap to the back of their head. Green woodpeckers will often forage in short grazed or mown permanent grasslands where the availability of ant nests is high.
A study of a nest in Romania found that 10 species of ant were fed to the chicks. During the first 10 days, the young received an average of 15 g (0.53 oz) each, from days 10–20, 39.5 g (1.39 oz), and from day 20, 49.3 g (1.74 oz). The seven chicks consumed an estimated 1.5 million ants and pupae before leaving the nest.
The beak is relatively weak and used for pecking in soft wood only. In common with other woodpecker species, the green woodpecker's tongue is long (10 cm) and has to be curled around its skull. It lacks the barbs of the Dendrocopos woodpeckers and black woodpecker (Dryocopus martius), but is made sticky by secretions from the enlarged salivary glands. Heavy, prolonged snow cover makes feeding difficult for the green woodpecker and can result in high mortality, from which it may take 10 years for the population to recover. Ant nests can be located under the snow; one bird was observed to dig 85 cm to reach a nest.


More than 75% of the range of the European green woodpecker is in Europe, where it is absent from some northern and eastern parts and from Ireland, Greenland and the Macaronesian Islands, but otherwise distributed widely. Over half of the European population is thought to be in France and Germany, with substantial numbers also in United Kingdom, Sweden, Russia, Croatia, Romania and Bulgaria. It also occurs in western Asia.
The European green woodpecker has a large range and an Estimated Global Extent of Occurrence of between 1 million to 10 million square kilometres, and a population in the region of 920,000 to 2.9 million birds. Populations appear to be stable, so the species is considered of Least Concern. The species is highly sedentary and individuals rarely move more than around 500 m between breeding seasons.
A combination of old deciduous trees for nesting, and nearby feeding grounds with plenty of ants, is essential. This is usually found in semi-open landscapes with small woodlands, hedges, scattered old trees, edges of forests and floodplain forests. Suitable habitats for foraging include grassland, heaths, plantations, orchards and lawns.


The European green woodpecker measures 30–36 cm (12–14 in) in length with a 45–51 cm (18–20 in) wingspan. Both sexes are green above and pale yellowish green below, with yellow rump and red crown and nape; the moustachial stripe has a red centre in the male but is solid black in the female. The lores and around the white eye are black in both male and female, except in the Iberian race P. v. subsp. sharpei, in which it is dark grey and males have only a lower black border to the moustache. Juveniles are spotty and streaked all over; the moustache is dark initially, though juvenile males can show some red feathers by early June or usually by July or August.
Moult takes place between June and November with the first flight feathers being lost around the time the young fledge. Juveniles moult quickly after fledging and gain their adult plumage between August and November.
Although the European green woodpecker is shy and wary, it is usually its loud calls, known as yaffling, which first draw attention. It 'drums' rarely (a soft, fast roll), but often gives a noisy kyü-kyü-kyück while flying. The song is a loud series of 10–18 'klü' sounds which gets slightly faster towards the end and falls slightly in pitch. The female makes a thinner pü-pü-pü-pü-pü-pü-pü. The flight is undulating, with 3–4 wingbeats followed by a short glide when the wings are held by the body.
It can be distinguished from the similar, but smaller, grey-headed woodpecker by its yellowish, not grey, underparts, and the black lores and facial 'mask'. In Europe, its green upperparts and yellow rump can lead to confusion with the grey-headed woodpecker or possibly the female golden oriole, though the latter is smaller and more slender with narrower wings and longer tail. The closely related, very similar Levaillant's woodpecker occurs only in north-west Africa.


Fork-tailed flycatchers are usually found below 1000 m elevation where they occur in a wide variety of habitats including pastures, riparian forests, forest edges, mangroves, and open residential areas with scattered trees. During migration, however, T. savana may be found in an even broader range of habitats.
Its breeding range is from central Mexico to central Argentina. In most of this range, it is usually found year-round, but in the southern parts of its range, it retreats northward for the winter.
During migration, fork-tailed flycatchers are quite gregarious, nesting in flocks of up to 10,000 individuals. This species is known to wander widely. It is spotted almost annually in the eastern United States seaboard and Canada, normally around fall (September–November).
During migration, fork-tailed flycatchers have been observed flying accompanied by relative species such as eastern kingbirds and aggressively chasing off predators.
The nominate subspecies, T. s. savana, is found in central and southern Brazil, Bolivia, Paraguay, Uruguay, and Argentina (south to the Río Negro), and overwinters in Amazonia, a large portion of northern South America (i.e., within the Orinoco River Basin), and Trinidad and Tobago, occasionally appearing in the West Indies.


This species is primarily an insectivore, but will switch to berries and small fruits during winter if insects become scarce. Fork-tailed flycatchers sally from their perches to eat flying insects or glean them off of leaves and fruit. When insects become less available in winter months, they have been observed eating fruits.
Fork-tailed flycatchers long tail is an important asset in their hunt for arthropods. The long tail allows them to turn on a dime and sally after prey. In fact, fork-tailed flycatchers – though small and light – can reach speeds up to 65 miles per hour (105 km/h) and stop/turn impressively quickly using their flashy tails.


Males perform aerial courtship displays involving swirling somersaults, twists, and flips. All partnered with their buzzing calls, they do their best to impress female counterparts. Courtship displays also provide a usage for their long tail feathers (which are longer in males), as a way to impress potential mates. Breeding seasons are dependent on subspecies and location; breeding season ranges from late summer to mid-winter.
Fork-tailed flycatchers tend to build their cup nests in similar habitats to their hunting grounds (riparian forests, grasslands). They tend to prefer specific trees in specific geographic locations, such as Kielmeyera trees in central Brazil. The clutch is 1–3 eggs.


The fork-tailed flycatcher is white below and gray above, and has a black cap. Males sometimes show a yellow crown stripe. Males also have an extremely long, forked tail, of even greater length than that of the related scissor-tailed flycatcher. Females have a somewhat shorter tail, and it is significantly shorter in juveniles. Males are 37–41 cm (15–16 in) in length; females, 28–30 cm (11–12 in), including tail. They weigh only 28–32 g (0.99–1.13 oz), much less than closely related kingbirds, which are half the total length of this species. The tail in adult males is two to three times longer than the length of the bird from the bill to the base of the tail. Generally, males and females of the species look quite similar, but can be distinguished by the longer tail in males.
The nominate subspecies T. s. savana has a darker grey back compared to T. s. monachus and T. s. sanctaemartae, which have notable light backs that contrast greatly with their black heads. Discrete notches on the primary feathers are also quite handy in identifying subspecies.
Most fork-tailed flycatchers are migratory, but some stay year round, especially in southern Mexico. Migratory fork-tailed flycatchers tend to have more pointed wings than nonmigratory flycatchers.


The black-tailed gnatcatcher (Polioptila melanura) is a small, insectivorous bird which ranges throughout the Sonoran and Chihuahuan Deserts of the southwestern United States and northern Mexico.  It is nonmigratory and found in arid desert areas year-round.


Black-tailed gnatcatchers live in pairs all year, defending their territory and foraging in trees and low shrubs for a wide variety of small insects and some spiders. Unlike the blue-grey gnatcatcher, the black-tailed variety rarely catches insects in midair.


The nest is an open-cup, built by both sexes, and is typically found in low shrubs less than five feet off the ground. If available at the nesting site, desert mistletoe, Phoradendron californicum, is often used as the substrate for the nest, which provides nice concealment.  It is constructed of a variety of materials including weeds, grass, strips of bark, spider webs and plant fibers. It is lined with finer, softer matter. Three to five bluish-white eggs with red-brown dots are incubated by both parents and take 14 days to hatch. The young are fed by both parents, and leave the nest 10 to 15 days after hatching. Even though cowbirds often lay eggs in this species' nests, and the pair end up raising cowbird young, the black-tailed gnatcatcher population seems to be holding up well.


The great kiskadee occupies a wide range of habitats, from open grassland with scattered trees to urban areas. Its range extends from the Lower Rio Grande Valley in southern Texas south through Central America to southern Argentina. It does not occur in Chile. The great kiskadee was introduced to Bermuda in 1957. Two hundred birds were imported from Trinidad in an attempt to control the number of lizards, especially the tree lizard (Anolis grahami) which had itself been introduced. The birds bred successfully and by 1976 the population on the island had expanded to around 60,000. The great kiskadee is omnivorous and has failed to control the number of lizards.


This alert and aggressive bird has a strong and maneuverable flight, which it uses to good effect when it feels annoyed by raptors. Even much larger birds are attacked by the great kiskadee, usually by diving down or zooming straight at them while they are in mid-air. Harsh calls are also often given during these attacks, alerting all potential prey in the area of the predator's presence. If not very hungry, any raptor subject to a great kiskadee's mobbing behavior is likely to leave, as it is well-nigh impossible to make a good catch when subject to the tyrant flycatcher's unwelcome attention. In general, avian predators are liable to steer clear of an alert great kiskadee, lest their hunting success be spoiled, and will hunt the great kiskadee itself – though it is as meaty as a fat thrush – only opportunistically.
To mammalian and squamate predators that can sneak up to nesting or sleeping birds, it is more vulnerable however. Even omnivorous mammals as small as the common marmoset (Callithrix jacchus) will try to plunder great kiskadee nests – at least during the dry season when fruits are scarce – despite the birds' attempts to defend their offspring. One of two birds studied in the Parque Nacional de La Macarena of Colombia was parasitized by microfilariae.


Great kiskadees are monogamous and defend a territory. Both sexes build the large domed nest that has a side entrance. It is chiefly composed of grasses and small twigs but can also incorporate lichen, string and plastic. The birds will steal material from other nests. The nest is placed in a wide range of sites, often in an exposed position high up in a tree or on man-made structures. Occasionally the nest is placed in a cavity. The clutch is 3 to 4 eggs. These are moderately glossy, light yellowish cream in colour with purplish black and purplish brown spots. The average size is 27.9 mm × 20.0 mm (1.10 in × 0.79 in). Only the female incubates the eggs; the male guards the nest while she leaves the nest to feed. The eggs hatch after 16–17 days. The chicks are fed by both parents and fledge after 17–18 days.


The adult great kiskadee is one of the largest of the tyrant flycatchers. It is 25 to 28 cm (9.8 to 11.0 in) in length and weighs 53 to 71.5 g (1.87 to 2.52 oz). The head is black with a strong white supercilium and a concealed yellow crown stripe. The upperparts are brown, and the wings and tail are brown with usually strong rufous fringes. The bill is short, thick, and black in color. The similar boat-billed flycatcher (Megarynchus pitangua) has a more massive black bill, an olive-brown back and very little rufous in the tail and wings. A few other tyrant flycatchers — the social flycatcher (Myiozetetes similis), for example — share a similar color pattern, but these species are markedly smaller.
The call is an exuberant BEE-tee-WEE, and the bird has an onomatopoeic name in different languages and countries: In Brazil its popular name is bem-te-vi ("I saw you well") and in Spanish-speaking countries it is often bien-te-veo ("I see you well") and sometimes shortened to benteveo. In Venezuela it is called "cristofué" or "Christ did it".


The black swan (Cygnus atratus) is a large waterbird, a species of swan which breeds mainly in the southeast and southwest regions of Australia.  Within Australia, the black swan is nomadic, with erratic migration patterns dependent upon climatic conditions. It is a large bird with mostly black plumage and a red bill. It is a monogamous breeder, with both partners sharing incubation and cygnet-rearing duties.
The black swan was introduced to various countries as an ornamental bird in the 1800s, but has managed to escape and form stable populations. Described scientifically by English naturalist John Latham in 1790, the black swan was formerly placed into a monotypic genus, Chenopis. Black swans can be found singly, or in loose companies numbering into the hundreds or even thousands. It is a popular bird in zoological gardens and bird collections, and escapees are sometimes seen outside their natural range.
This bird is a regional symbol of both Western Australia, where it is native, and the English town of Dawlish, where it is an introduced species.


The black swan is almost exclusively herbivorous, and while there is some regional and seasonal variation, the diet is generally dominated by aquatic and marshland plants. In New South Wales the leaf of reedmace (genus Typha) is the most important food of birds in wetlands, followed by submerged algae and aquatic plants such as Vallisneria. In Queensland, aquatic plants such as Potamogeton, stoneworts, and algae are the dominant foods. The exact composition varies with water level; in flood situations where normal foods are out of reach black swans will feed on pasture plants on shore. The black swan feeds in a similar manner to other swans. When feeding in shallow water it will dip its head and neck under the water and it is able to keep its head flat against the bottom while keeping its body horizontal. In deeper water the swan up-ends to reach lower. Black swans are also able to filter feed at the water's surface.


The black swan is common in the wetlands of southwestern and eastern Australia and adjacent coastal islands. In the south west its range encompasses an area between North West Cape, Cape Leeuwin and Eucla; while in the east it covers a large region bounded by the Atherton Tableland, the Eyre Peninsula and Tasmania, with the Murray Darling Basin supporting very large populations of black swans. It is uncommon in central and northern Australia.
The black swan's preferred habitat extends across fresh, brackish and salt water lakes, swamps and rivers with underwater and emergent vegetation for food and nesting materials. It also favors permanent wetlands, including ornamental lakes, but can also be found in flooded pastures and tidal mudflats, and occasionally on the open sea near islands or the shore.
The black swan was once thought to be sedentary, but is now known to be highly nomadic. There is no set migratory pattern, but rather opportunistic responses to either rainfall or drought. In high rainfall years, emigration occurs from the south west and south east into the interior, with a reverse migration to these heartlands in drier years. When rain does fall in the arid central regions, black swans will migrate to these areas to nest and raise their young. However, should dry conditions return before the young have been raised, the adult birds will abandon the nests and their eggs or cygnets and return to wetter areas.
The black swan, like many other water fowl, loses all its flight feathers at once when it moults after breeding and is unable to fly for about a month. During this time it will usually settle on large, open waters for safety.
The species has a large range, with figures between 1 and 10 million km² given as the extent of occurrence. The current global population is estimated to be up to 500,000 individuals.  No threat of extinction or significant decline in population has been identified with this numerous and widespread bird.
Black swans were first seen by Europeans in 1697, when Willem de Vlamingh's expedition explored the Swan River, Western Australia.


Like other swans, the black swan is largely monogamous, pairing for life (about 6% divorce rate). Recent studies have shown that around a third of all broods exhibit extra-pair paternity. An estimated one-quarter of all pairings are homosexual, mostly between males.  They steal nests, or form temporary threesomes with females to obtain eggs, driving away the female after she lays the eggs.
Generally, black swans in the Southern hemisphere nest in the wetter winter months (February to September), occasionally in large colonies. A black swan nest is essentially a large heap or mound of reeds, grasses and weeds between 1 and 1.5 metres (3–4+1⁄2 feet) in diameter and up to 1 metre high, in shallow water or on islands. A nest is reused every year, restored or rebuilt as needed. Both parents share the care of the nest.  A typical clutch contains four to eight greenish-white eggs that are incubated for about 35–40 days. Incubation begins after the laying of the last egg, to synchronise the hatching of the chicks. Prior to the commencement of incubation the parent will sit over the eggs without actually warming them. Both sexes incubate the eggs, with the female incubating at night. The change over between incubation periods is marked by ritualised displays by both sexes. If eggs accidentally roll out of the nest both sexes will retrieve the egg using the neck (in other swan species only the female performs this feat). Like all swans, black swans will aggressively defend their nests with their wings and beaks. After hatching, the cygnets are tended by the parents for about nine months until fledging. Cygnets may ride on their parent's back for longer trips into deeper water, but black swans undertake this behaviour less frequently than mute and black-necked swans.


Black swans are mostly black-feathered birds, with white flight feathers. The bill is bright red, with a pale bar and tip; and legs and feet are greyish-black. Cobs (males) are slightly larger than pens (females), with a longer and straighter bill. Cygnets (immature birds) are a greyish-brown with pale-edged feathers.
Mature black swans measure between 110 and 142 centimetres (43 and 56 in) in length and weigh 3.7–9 kilograms (8.2–19.8 lb). Their wing span is between 1.6 and 2 metres (5.2 and 6.6 ft). The neck is long (relatively the longest neck among the swans) and curved in an "S"-shape.
The black swan utters a musical and far reaching bugle-like sound, called either on the water or in flight, as well as a range of softer crooning notes. It can also whistle, especially when disturbed while breeding and nesting.
When swimming, black swans hold their necks arched or erect and often carry their feathers or wings raised in an aggressive display. In flight, a wedge of black swans will form as a line or a V, with the individual birds flying strongly with undulating long necks, making whistling sounds with their wings and baying, bugling or trumpeting calls.
The black swan is unlike any other Australian bird, although in poor light and at long range it may be confused with a magpie goose in flight. However, the black swan can be distinguished by its much longer neck and slower wing beat.
One captive population of black swans in Lakeland, Florida has produced a few individuals which are a light mottled grey colour instead of black. White black swans are also known to exist; these individuals, which are leucistic, are believed to occur rarely in the wild.


This bird is widespread, in the breeding season, throughout the forests of northern Europe and east across the Palearctic. It is migratory, wintering in southern Europe, North Africa, northern India, northern Pakistan, China, and Japan.  It frequently strays into Alaska during migration and there are scattered records across the northern United States and southern Canada. The global population of bramblings is about 100 to 200 million, with a decreasing trend.
Open coniferous or birch woodland is favoured for breeding.


This species is almost entirely migratory. In Europe, it forms large flocks in the winter, sometimes with thousands or even millions of birds in a single flock. Such large gatherings occur especially if beech mast is abundant. Bramblings do not require beech mast in the winter, but winter flocks of bramblings will move until they find it. This may be an adaptation to avoid competition with the common chaffinch. Bramblings mostly eat seeds in winter, but insects in summer. It builds its nest in a tree fork, and decorates the exterior with moss or lichen to make it less conspicuous. It lays 4–9 eggs.


The brambling is similar in size and shape to a common chaffinch. Breeding-plumaged male bramblings are very distinctive, with a black head, dark upperparts, orange breast and white belly. Females and younger birds are less distinct, and more similar in appearance to some chaffinches. In all plumages, however, bramblings differs from chaffinches in a number of features:
the brambling has a white rump, whereas that of the common chaffinch is grey-green;
the breast is orange, contrasting with a white belly, on the brambling, whereas on the common chaffinch, the underparts are more uniformly coloured (pink or buff);
the brambling's scapular feathers are orange, whereas the common chaffinch's are grey or grey-brown;
the flanks are dark-spotted on the brambling, plain on the common chaffinch;
bramblings lack the white outer tail feathers of common chaffinches.
An additional difference for all plumages except breeding-plumaged males is the bill colour - yellow in the brambling, dull pinkish in the common chaffinch (breeding-plumaged male bramblings have black bills, common chaffinches in the corresponding plumage have grey bills).
Measurements:
Length: 16 cm
Weight: 23-29 g
Wingspan: 25–26 cm


The pied stilt (Himantopus leucocephalus), also known as the white-headed stilt, is a shorebird in the family Recurvirostridae. It is widely distributed with a large total population size and apparently stable population trend, occurring in Malaysia, Japan, the Philippines, Brunei, Christmas Island, Indonesia, Palau, Papua New Guinea, Australia, and New Zealand. It is listed as Least Concern on the IUCN Red List.
It is sometimes considered a subspecies of the black-winged stilt (H. himantopus).


The pied stilt is a waterbird and feeds in shallow water, probing into the sediment with its beak. It is gregarious, and in New Zealand sometimes forms mixed flocks with the black stilt (Himantopus novaezelandiae). It feeds largely on aquatic insects and on small molluscs. It emits a repeated yelping cry as it flies, and the legs trail behind it, tending to sway from side-to-side.
The pied stilt breeds in spring, choosing as a nesting site an area of sand or shingle by an estuary, beside a dried up riverbed, on a flat bit of coast or in a grassy field near the sea. It seems particularly attracted to locations near where the red duck-weed (Azolla rubra) flourishes. It prepares a nest in a shallow depression or in a scrape in the ground where it usually lays four, ovoido-conical eggs. These are yellowish-brown dappled irregularly with dark blotches and spots. The nest is difficult to find as the eggs are well-camouflaged. But the parent birds give away the presence of the nest by mounting into the air and flying in circles, uttering distress cries. The chicks are able to leave the nest almost as soon as they have hatched. They are difficult to detect because their downy plumage is well-camouflaged and they "freeze" when alarmed. A parent bird sometimes feigns a leg injury to draw intruders away from its chicks.


The pied stilt is resident in southern Sumatra, Java, Sulawesi and most of Australia, New Zealand and Papua New Guinea. There are non-breeding populations in Sri Lanka, the Philippines, Brunei, Palau, South Kalimantan, West Nusa Tenggara, East Nusa Tenggara, East Timor and New Guinea. This bird is a vagrant to Japan and Christmas Island.


The pied stilt grows to a length of about 14 in (36 cm) with a wingspan of about 26.5 in (67 cm). The back of the head and neck, the back and the upper surfaces of the wings are glossy greenish-black. The undersides of the wings are plain black and the remainder of the plumage is white, apart from the tail feathers which are tinged with grey. The long, thin legs are pink and the toes have black claws. The long slender beak is black and the irises and the eyelids are red.


Lactarius deliciosus has a carrot-orange cap that is convex to vase shaped, inrolled when young, 4 to 14 centimetres (1+1⁄2 to 5+1⁄2 inches) across, often with darker orange lines in the form of concentric circles. The cap is sticky and viscid when wet, but is often dry. It has crowded decurrent gills and a squat orange stipe that is often hollow, 3 to 8 cm (1 to 3 in) long and 1 to 2 cm (1⁄2 to 1 in) thick. The flesh stains a deep green color when handled. When fresh, it exudes an orange-red latex that does not change color.
The mushroom is similar to L. rubrilacteus, which stains blue, exudes a red latex, and is also edible. It also resembles L. olympianus, which has white latex and tastes unpleasant.


L. deliciosus is an edible mushroom, but may taste mild or bitter; its misleading epithet, deliciosus ('delicious'), may have been caused by Linnaeus mistaking it for another species. The mushrooms are collected in August to early October, where they are traditionally fried, salted or pickled. High consumption of the species may cause urine to discolor to orange or red. Some field guides hold L. sanguifluus in higher esteem.
It is widely collected in the Iberian Peninsula, and used in Spanish cuisine—being probably the most sought after wild mushroom in the country. One recipe recommends they should be lightly washed, fried whole cap down in olive oil with a small amount of garlic and served drenched in raw olive oil and parsley. The same recipe advises that butter should never be used when cooking this mushroom.
Further north and east it is a feature of Provençal cuisine. They are also collected in Poland, where they are traditionally served fried in butter, with cream, or marinated. In Cyprus, saffron milk caps are usually grilled on the charcoal and then dressed in olive oil and lemon or bitter orange, they are sautéed with onions, or sometimes stewed with onions, coriander and red wine. In Russian cuisine these mushrooms are traditionally preserved by salting.
In India, the fungus is one of the ten most widely consumed mushrooms by ethnic tribes of Meghalaya.


Its breeding habitat is freshwater lakes and rivers across northern North America, Greenland, Europe, and the Palearctic. It nests in sheltered locations on the ground near water. It is migratory and many northern breeders winter in coastal waters further south.


Red-breasted mergansers dive and swim underwater. They mainly eat small fish, but also aquatic insects, crustaceans, and frogs.


The adult red-breasted merganser is 51–62 cm (20–24 in) long with a 70–86 cm (28–34 in) wingspan. The red-breasted merganser weight ranges from 28.2 to 47.6 oz (800 to 1,350 g).
It has a spiky crest and long thin red bill with serrated edges. The male has a dark head with a green sheen, a white neck with a rusty breast, a black back, and white underparts. Adult females have a rusty head and a grayish body. Juveniles look similar to females, but lack the white collar and have smaller white wing patches.


The Altamira oriole (Icterus gularis) is a New World oriole. The bird is widespread in subtropical lowlands of the Mexican Gulf Coast and northern Central America, the Pacific coast and inland. They have since spread to southern Texas, but this was not until 1939.
At 25 cm (9.8 in) and 56 g (2.0 oz), this is the largest oriole in genus Icterus. The bird nests in open woodland, with the nest being a very long woven pouch, attached to the end of a horizontal tree branch, sometimes to telephone wires.
This bird forages high in trees, sometimes in the undergrowth. They mainly eat insects and berries.
These birds are permanent residents, and unlike the migratory orioles that breed in the US, the species is sexually monomorphic—both the males and the females have elaborate coloration and patterning.


The Altamira oriole is a forage gleaner, searching for food through the tree-tops to the near-ground bottom of the tree. Its diet includes fruit (small fruits, hackberries and figs) and insects, such as grasshoppers, crickets, and caterpillars.


In Texas, their breeding season ranges from late April to late July. Their nest resembles a small pouch made of moss, grass, palm fibers, weeds, strips of bark, and is lined with feathers. The nest may also hang from telephone wires. The nest is assumed to be built by the female, but it is not known how long this takes. 4–6 eggs are laid, and nestlings are fed and cared for by both parents.


The Eurasian penduline tit or European penduline tit (Remiz pendulinus) is a passerine bird of the genus Remiz. It is relatively widespread throughout the western Palearctic. It is migratory in the northern part of its range but resident in the southern part.
The breeding range in Western Europe experienced an expansion during the 1980s and 1990s. This was accompanied by an expansion of the species’ winter range and reached as far south as northern Morocco.
It builds an elaborate hanging nest, formerly used in Central Europe as children's slippers.


The Eurasian penduline tit usually eats insects and spiders but will also eat seeds such as those from the willow (Salix). It generally searches for food in trees but will also forage in reeds where it will take insects from the stem as well as the seed head. It uses one foot to cling to the reed and the other to pull out clumps of seeds from the head.


The eggs are laid from end of April to the beginning of July. The nest is suspended from thin long branches of trees such as willow (Salix), elm (Ulmus) or birch (Betula), often over water. The nest can also sometimes be suspended between two or three reeds (Typha) only a meter or so above the water. The nest is a large free hanging pouch-shaped structure, approximately 25 cm (9.8 in) in height and 17 cm (6.7 in) in diameter. It is made of plant fibres, grass, hair and wool with an entrance tube at one side. Both sexes contribute to the construction which takes around 20 days. Eggs are laid daily. The clutch contains 6 to 8 white eggs which measure 16.2 mm × 10.7 mm (0.64 in × 0.42 in) and weigh 0.95 g (0.034 oz). Incubation starts after the last egg is laid and lasts for 14 days. The eggs are incubated by either the male or more usually the female, but not by both. The hatching is synchronous. The young are cared for by either the male or the female but rarely by both parents. The nestlings are fed larval insects and spiders. The nestlings fledge at around 22 days of age. The parents will sometimes attempt to raise a second brood, but this is rarely successful.


The black-collared starling (Gracupica nigricollis) is a species of starling in the family Sturnidae. Its plumage is black and white, with a black collar. It is found in southern China and most of mainland Southeast Asia, and has been introduced to Taiwan, Malaysia and Singapore. Its habitats include grassland, dry forest and human settlements. The International Union for Conservation of Nature (IUCN) has assessed it as being of least concern.


This starling forages on the ground, sometimes around livestock. It feeds on insects, earthworms and seeds. A very vocal bird, its calls include shrill, harsh, melodious and discordant notes, such as a jay-like kraak kraak, a whistling prrü resembling a bee-eater, and a pü-pü-pü-pü similar to a "hesitant" rufous-capped babbler. Its song is transcribed as tcheeuw-tchew-trieuw. Two courtship displays have been recorded. One consists of a pair facing each other, their feathers ruffled and beaks open. In the other, the pair droop their wings and bow their heads. Between displays, the pair run or fly after each other. Pairs also preen each other, a behaviour known as allopreening. The breeding season has been recorded as February to May in Thailand, March to July in China, and April to August in Burma. The large, domed nest is constructed from twigs, grasses, feathers and flowers. It is built on a tree, and may be re-used. Nesting colonies have been observed. Three to five eggs are laid per clutch.


This species is found in southern China from Fujian to Yunnan, and south to Burma, Laos, Cambodia, Vietnam and Thailand. An individual recorded in Brunei may be an escaped captive or a vagrant. It has been introduced to Taiwan, Malaysia and Singapore. This starling lives in grassland, dry forest, cultivated areas and human settlements, mostly occurring at low elevations, but also up to 2,000 m (6,600 ft).


The ovenbird (Seiurus aurocapilla) is a small songbird of the New World warbler family (Parulidae). This migratory bird breeds in eastern North America and winters in Central America, many Caribbean islands, Florida and northern Venezuela.