Question: Who is the discoverer or inventor of this object?

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Fresnel lens. A Fresnel lens ( ; ; or ) is a type of composite compact lens developed by the French physicist Augustin-Jean Fresnel (1788–1827) for use in lighthouses. It has been called "the invention that saved a million ships."The design allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional design. A Fresnel lens can be made much thinner than a comparable conventional lens, in some cases taking the form of a flat sheet. The simpler dioptric (purely refractive) form of the lens.

Fresnel lens. was first proposed by Count Buffon and independently reinvented by Fresnel. The "catadioptric" form of the lens, entirely invented by Fresnel, has outer elements that use total internal reflection as well as refraction; it can capture more oblique light from a light source and add it to the beam of a lighthouse, making the light visible from greater distances.## Description.The Fresnel lens reduces the amount of material required compared to a conventional lens by dividing the lens into a set of concentric annular sections. An ideal Fresnel lens would have an infinite number of sections. In each section, the overall.

Fresnel lens. thickness is decreased compared to an equivalent simple lens. This effectively divides the continuous surface of a standard lens into a set of surfaces of the same curvature, with stepwise discontinuities between them.In some lenses, the curved surfaces are replaced with flat surfaces, with a different angle in each section. Such a lens can be regarded as an array of prisms arranged in a circular fashion with steeper prisms on the edges and a flat or slightly convex center. In the first (and largest) Fresnel lenses, each section was actually a separate prism. 'Single-piece' Fresnel lenses were later produced, being.

Fresnel lens. used for automobile headlamps, brake, parking, and turn signal lenses, and so on. In modern times, computer-controlled milling equipment (CNC) or 3-D printers might be used to manufacture more complex lenses.Fresnel lens design allows a substantial reduction in thickness (and thus mass and volume of material) at the expense of reducing the imaging quality of the lens, which is why precise imaging applications such as photography usually still use larger conventional lenses.Fresnel lenses are usually made of glass or plastic; their size varies from large (old historical lighthouses, meter size) to medium (book-reading aids, OHP viewgraph projectors) to small (TLR/SLR.

Fresnel lens. camera screens, micro-optics). In many cases they are very thin and flat, almost flexible, with thicknesses in the 1 to 5 (mm) range.Most modern Fresnel lenses consist only of refractive elements. Lighthouse lenses, however, tend to include both refracting and reflecting elements, the latter being "outside" the metal rings seen in the photographs. While the inner elements are sections of refractive lenses, the outer elements are reflecting prisms, each of which performs two refractions and one total internal reflection, avoiding the light loss that occurs in reflection from a silvered mirror.## Lighthouse lens sizes.Fresnel designed six sizes of lighthouse lenses,.

Fresnel lens. divided into four "orders" based on their size and focal length. In modern use, these are classified as first through sixth order. An intermediate size between third and fourth order was added later, as well as sizes above first order and below sixth.A first-order lens has a focal length of 920 (mm) and stands about 2.59 (m) high, and 1.8 (m) wide. The smallest (sixth) order has a focal length of 150 (mm) and a height of 433 (mm).The largest Fresnel lenses are called hyperradiant (or hyper-radial). One such lens was on hand when it was decided to build and.

Fresnel lens. outfit the Makapuu Point Light in Hawaii. Rather than order a new lens, the huge optic construction, 12 (ft) tall and with over a thousand prisms, was used there.## Types.There are two main types of Fresnel lens: "imaging" and "non-imaging". Imaging Fresnel lenses use segments with curved cross-sections and produce sharp images, while non-imaging lenses have segments with flat cross-sections, and do not produce sharp images. As the number of segments increases, the two types of lens become more similar to each other. In the abstract case of an infinite number of segments, the difference between curved and flat segments.

Fresnel lens. disappears.Spherical: A spherical Fresnel lens is equivalent to a simple spherical lens, using ring-shaped segments that are each a portion of a sphere, that all focus light on a single point. This type of lens produces a sharp image, although not quite as clear as the equivalent simple spherical lens due to diffraction at the edges of the ridges.Cylindrical: A cylindrical Fresnel lens is equivalent to a simple cylindrical lens, using straight segments with circular cross-section, focusing light on a single line. This type produces a sharp image, although not quite as clear as the equivalent simple cylindrical lens due.

Fresnel lens. to diffraction at the edges of the ridges.Spot: A non-imaging spot Fresnel lens uses ring-shaped segments with cross sections that are straight lines rather than circular arcs. Such a lens can focus light on a small spot, but does not produce a sharp image. These lenses have application in solar power, such as focusing sunlight on a solar panel. Fresnel lenses may be used as components of Köhler illumination optics resulting in very effective nonimaging optics Fresnel-Köhler (FK) solar concentrators.Linear: A non-imaging linear Fresnel lens uses straight segments whose cross sections are straight lines rather than arcs. These lenses focus.

Fresnel lens. light into a narrow band. They do not produce a sharp image, but can be used in solar power, such as for focusing sunlight on a pipe, to heat the water within.## Uses.## Imaging.Fresnel lenses are used as simple hand-held magnifiers. They are also used to correct several visual disorders, including ocular-motility disorders such as strabismus. Fresnel lenses have been used to increase the visual size of CRT displays in pocket televisions, notably the Sinclair TV80. They are also used in traffic lights.Fresnel lenses are used in left-hand-drive European lorries entering the UK and Republic of Ireland (and vice versa,.

Fresnel lens. right-hand-drive Irish and British trucks entering mainland Europe) to overcome the blind spots caused by the driver operating the lorry while sitting on the wrong side of the cab relative to the side of the road the car is on. They attach to the passenger-side window.Another automobile application of a Fresnel lens is a rear view enhancer, as the wide view angle of a lens attached to the rear window permits examining the scene behind a vehicle, particularly a tall or bluff-tailed one, more effectively than a rear-view mirror alone.Multi-focal Fresnel lenses are also used as a part of retina.

Fresnel lens. identification cameras, where they provide multiple in- and out-of-focus images of a fixation target inside the camera. For virtually all users, at least one of the images will be in focus, thus allowing correct eye alignment.Fresnel lenses have also been used in the field of popular entertainment. The British rock artist Peter Gabriel made use of them in his early solo live performances to magnify the size of his head, in contrast to the rest of his body, for dramatic and comic effect. In the Terry Gilliam film "Brazil", plastic Fresnel screens appear ostensibly as magnifiers for the small CRT.

Fresnel lens. monitors used throughout the offices of the Ministry of Information. However, they occasionally appear between the actors and the camera, distorting the scale and composition of the scene to humorous effect. The Pixar movie Wall-E features a Fresnel lens in the scenes where the protagonist watches the musical Hello, Dolly! magnified on an iPod.## Photography.Canon and Nikon have used Fresnel lenses to reduce the size of telephoto lenses. Photographic lenses that include Fresnel elements can be much shorter than corresponding conventional lens design. Nikon calls the technology "Phase Fresnel".The Polaroid SX-70 camera used a Fresnel reflector as part of its.

Fresnel lens. viewing system.View and large format cameras can utilize a Fresnel lens in conjunction with the ground glass, to increase the perceived brightness of the image projected by a lens onto the ground glass, thus aiding in adjusting focus and composition.## Illumination.High-quality glass Fresnel lenses were used in lighthouses, where they were considered state of the art in the late 19th and through the middle of the 20th centuries; most lighthouses have now retired glass Fresnel lenses from service and replaced them with much less expensive and more durable aerobeacons, which themselves often contain plastic Fresnel lenses. Lighthouse Fresnel lens systems.

Fresnel lens. typically include extra annular prismatic elements, arrayed in faceted domes above and below the central planar Fresnel, in order to catch all light emitted from the light source. The light path through these elements can include an internal reflection, rather than the simple refraction in the planar Fresnel element. These lenses conferred many practical benefits upon the designers, builders, and users of lighthouses and their illumination. Among other things, smaller lenses could fit into more compact spaces. Greater light transmission over longer distances, and varied patterns, made it possible to triangulate a position.Perhaps the most widespread use of Fresnel lenses,.

Fresnel lens. for a time, occurred in automobile headlamps, where they can shape the roughly parallel beam from the parabolic reflector to meet requirements for dipped and main-beam patterns, often both in the same headlamp unit (such as the European H4 design). For reasons of economy, weight, and impact resistance, newer cars have dispensed with glass Fresnel lenses, using multifaceted reflectors with plain polycarbonate lenses. However, Fresnel lenses continue in wide use in automobile tail, marker, and reversing lights.Glass Fresnel lenses also are used in lighting instruments for theatre and motion pictures (see Fresnel lantern); such instruments are often called simply "Fresnels".

Fresnel lens. The entire instrument consists of a metal housing, a reflector, a lamp assembly, and a Fresnel lens. Many Fresnel instruments allow the lamp to be moved relative to the lens' focal point, to increase or decrease the size of the light beam. As a result, they are very flexible, and can often produce a beam as narrow as 7° or as wide as 70°. The Fresnel lens produces a very soft-edged beam, so is often used as a wash light. A holder in front of the lens can hold a colored plastic film ("gel") to tint the light or wire.

Fresnel lens. screens or frosted plastic to diffuse it. The Fresnel lens is useful in the making of motion pictures not only because of its ability to focus the beam brighter than a typical lens, but also because the light is a relatively consistent intensity across the entire width of the beam of light.Aircraft carriers and naval air stations typically use Fresnel lenses in their optical landing systems. The "meatball" light aids the pilot in maintaining proper glide slope for the landing. In the center are amber and red lights composed of Fresnel lenses. Although the lights are always on, the angle.

Fresnel lens. of the lens from the pilot's point of view determines the color and position of the visible light. If the lights appear above the green horizontal bar, the pilot is too high. If it is below, the pilot is too low, and if the lights are red, the pilot is very low.Fresnel lenses are also commonly used in searchlights, spotlights, and flashlights.## Projection.The use of Fresnel lenses for image projection reduces image quality, so they tend to occur only where quality is not critical or where the bulk of a solid lens would be prohibitive. Cheap Fresnel lenses can be.

Fresnel lens. stamped or molded of transparent plastic and are used in overhead projectors and projection televisions.Fresnel lenses of different focal lengths (one collimator, and one collector) are used in commercial and DIY projection. The collimator lens has the lower focal length and is placed closer to the light source, and the collector lens, which focuses the light into the triplet lens, is placed after the projection image (an active matrix LCD panel in LCD projectors). Fresnel lenses are also used as collimators in overhead projectors.## Solar power.Since plastic Fresnel lenses can be made larger than glass lenses, as well as being.

Fresnel lens. much cheaper and lighter, they are used to concentrate sunlight for heating in solar cookers, in solar forges, and in solar collectors used to heat water for domestic use. They can also be used to generate steam or to power a Stirling engine.Fresnel lenses can concentrate sunlight onto solar cells with a ratio of almost 500:1. This allows the active solar-cell surface to be reduced, lowering cost and allowing the use of more efficient cells that would otherwise be too expensive. In the early 21st century, Fresnel reflectors began to be used in concentrating solar power (CSP) plants to concentrate.

Fresnel lens. solar energy. One application was to preheat water at the coal-fired Liddell Power Station, in Hunter Valley Australia.Fresnel lenses can be used to sinter sand, allowing 3D printing in glass.## History.## Forerunners.Augustin-Jean Fresnel was not the first person to focus a lighthouse beam using a lens. That distinction apparently belongs to the London glass-cutter Thomas Rogers, who proposed the idea to Trinity House in 1788. The first Rogers lenses, 53cm in diameter and 14cm thick at the center, were installed at the Old Lower Lighthouse at Portland Bill in 1789. Behind each lamp was a back-coated spherical glass mirror, which.

Fresnel lens. reflected rear radiation back through the lamp and into the lens. Further samples were installed at Howth Baily, North Foreland, and at least four other locations by 1804. But much of the light was wasted by absorption in the glass.Nor was Fresnel the first to suggest replacing a convex lens with a series of concentric annular prisms, to reduce weight and absorption. In 1748, Count Buffon proposed grinding such prisms as steps in a single piece of glass. In 1790 (although secondary sources give the date as 1773 or 1788), the Marquis de Condorcet suggested that it would be easier.

Fresnel lens. to make the annular sections separately and assemble them on a frame; but even that was impractical at the time. These designs were intended not for lighthouses, but for burning glasses. David Brewster, however, proposed a system similar to Condorcet's in 1811, and by 1820 was advocating its use in British lighthouses.## Fresnel's contributions.The French (Commission of Lighthouses) was established by Napoleon in 1811, and placed under the authority of Fresnel's employer, the Corps of Bridges and Roads. As the members of the commission were otherwise occupied, it achieved little in its early years. But on 21 June 1819—three months.

Fresnel lens. after winning the physics of the Academy of Sciences for his celebrated memoir on diffraction—Fresnel was "temporarily" seconded to the commission on the recommendation of François Arago (a member since 1813), to review possible improvements in lighthouse illumination.By the end of August 1819, unaware of the Buffon-Condorcet-Brewster proposal, Fresnel made his first presentation to the commission, recommending what he called ('lenses by steps') to replace the reflectors then in use, which reflected only about half of the incident light. Much to Fresnel's embarrassment, one of the assembled commissioners, Jacques Charles, recalled Buffon's suggestion. However, whereas Buffon's version was biconvex and.

Fresnel lens. in one piece, Fresnel's was plano-convex and made of multiple prisms for easier construction. With an official budget of 500 francs, Fresnel approached three manufacturers. The third, François Soleil, found a way to remove defects by reheating and remolding the glass. Arago assisted Fresnel with the design of a modified Argand lamp with concentric wicks (a concept that Fresnel attributed to Count Rumford), and accidentally discovered that fish glue was heat-resistant, making it suitable for use in the lens. The prototype, finished in March 1820, had a square lens panel 55cm on a side, containing 97 polygonal (not annular) prisms—and.

Fresnel lens. so impressed the Commission that Fresnel was asked for a full eight-panel version. This model, completed a year later in spite of insufficient funding, had panels 76cm square. In a public spectacle on the evening of 13 April 1821, it was demonstrated by comparison with the most recent reflectors, which it suddenly rendered obsolete.Soon after this demonstration, Fresnel published the idea that light, including apparently unpolarized light, consists exclusively of transverse waves, and went on to consider the implications for double refraction and partial reflection.Fresnel acknowledged the British lenses and Buffon's invention in a memoir read on 29 July 1822.

Fresnel lens. and printed in the same year. The date of that memoir may be the source of the claim that Fresnel's lighthouse advocacy began two years later than Brewster's; but the text makes it clear that Fresnel's involvement began no later than 1819.Fresnel's next lens was a rotating apparatus with eight "bull's-eye" panels, made in annular arcs by Saint-Gobain, giving eight rotating beams—to be seen by mariners as a periodic flash. Above and behind each main panel was a smaller, sloping bull's-eye panel of trapezoidal outline with trapezoidal elements. This refracted the light to a sloping plane mirror, which then reflected.

Fresnel lens. it horizontally, 7 degrees ahead of the main beam, increasing the duration of the flash. Below the main panels were 128 small mirrors arranged in four rings, stacked like the slats of a louver or Venetian blind. Each ring, shaped like a frustum of a cone, reflected the light to the horizon, giving a fainter steady light between the flashes. The official test, conducted on the unfinished on 20 August 1822, was witnessed by the Commission—and by Louis XVIII and his entourage—from 20 (mi) away. The apparatus was stored at Bordeaux for the winter, and then reassembled at Cordouan Lighthouse.

Fresnel lens. under Fresnel's supervision—in part by Fresnel's own hands. On 25 July 1823, the world's first lighthouse Fresnel lens was lit. As expected, the light was visible to the horizon, more than 20 (mi) out.The day before the test of the Cordouan lens in Paris, a committee of the Academy of Sciences reported on Fresnel's memoir and supplements on double refraction—which, although less well known to modern readers than his earlier work on diffraction, struck a more decisive blow for the wave theory of light. Between the test and the reassembly at Cordouan, Fresnel submitted his papers on photoelasticity (16 September.

Fresnel lens. 1822), elliptical and circular polarization and optical rotation (9 December), and partial reflection and total internal reflection (7 January 1823), essentially completing his reconstruction of physical optics on the transverse wave hypothesis. Shortly after the Cordouan lens was lit, Fresnel started coughing up blood.In May 1824, Fresnel was promoted to Secretary of the , becoming the first member of that body to draw a salary, albeit in the concurrent role of Engineer-in-Chief. Late that year, being increasingly ill, he curtailed his fundamental research and resigned his seasonal job as an examiner at the , in order to save his remaining.

Fresnel lens. time and energy for his lighthouse work.In the same year he designed the first "fixed" lens—for spreading light evenly around the horizon while minimizing waste above or below. Ideally the curved refracting surfaces would be segments of toroids about a common vertical axis, so that the dioptric panel would look like a cylindrical drum. If this was supplemented by reflecting (catoptric) rings above and below the refracting (dioptric) parts, the entire apparatus would look like a beehive. The second Fresnel lens to enter service was indeed a fixed lens, of third order, installed at Dunkirk by 1 February 1825. However,.

Fresnel lens. due to the difficulty of fabricating large toroidal prisms, this apparatus had a 16-sided polygonal plan.In 1825 Fresnel extended his fixed-lens design by adding a rotating array outside the fixed array. Each panel of the rotating array was to refract part of the fixed light from a horizontal fan into a narrow beam.Also in 1825, Fresnel unveiled the ('lighthouse map'), calling for a system of 51 lighthouses plus smaller harbor lights, in a hierarchy of lens sizes called "orders" (the first being the largest), with different characteristics to facilitate recognition: a constant light (from a fixed lens), one flash per.

Fresnel lens. minute (from a rotating lens with eight panels), and two per minute (16 panels).In late 1825, to reduce the loss of light in the reflecting elements, Fresnel proposed to replace each mirror with a catadioptric prism, through which the light would travel by refraction through the first surface, then total internal reflection off the second surface, then refraction through the third surface. The result was the lighthouse lens as we now know it. In 1826 he assembled a small model for use on the , but he did not live to see a full-sized version: he died on 14 July.

Fresnel lens. 1827, at the age of 39.## After Fresnel.The first stage of the development of lighthouse lenses after the death of Augustin Fresnel consisted in the implementation of his designs. This was driven in part by his younger brother Léonor—who, like Augustin, was trained as a civil engineer but, unlike Augustin, had a strong aptitude for management. Léonor entered the service of the Lighthouse Commission in 1825, and went on to succeed Augustin as Secretary.The first fixed lens to be constructed with toroidal prisms was a first-order apparatus designed by the Scottish engineer Alan Stevenson under the guidance of Léonor Fresnel,.

Fresnel lens. and fabricated by Isaac Cookson & Co. using French glass; it entered service at the Isle of May, Scotland, on 22 September 1836. The first large catadioptric lenses were made in 1842 for the lighthouses at Gravelines and Île Vierge, France; these were fixed third-order lenses whose catadioptric rings (made in segments) were one metre in diameter. Stevenson's first-order Skerryvore lens, lit in 1844, was only partly catadioptric; it was similar to the Cordouan lens except that the lower slats were replaced by French-made catadioptric prisms, while mirrors were retained at the top. The first "fully" catadioptric first-order lens, installed.

Fresnel lens. at Pointe d'Ailly in 1852, also gave eight rotating beams plus a fixed light at the bottom; but its top section had eight catadioptric panels focusing the light about 4 degrees ahead of the main beams, in order to lengthen the flashes. The first fully catadioptric lens with "purely revolving" beams—also of first order—was installed at Saint-Clément-des-Baleines in 1854, and marked the completion of Augustin Fresnel's original "Carte des Phares".Thomas Stevenson (younger brother of Alan) went a step beyond Fresnel with his "holophotal" lens, which focused the light radiated by the lamp in nearly all directions, forward or backward, into.

Fresnel lens. a single beam. The first version, described in 1849, consisted of a standard Fresnel bull's-eye lens, a paraboloidal reflector, and a rear hemispherical reflector (functionally equivalent to the Rogers mirror of 60 years earlier, except that it subtended a whole hemisphere). Light radiated into the forward hemisphere but missing the bull's-eye lens was deflected by the paraboloid into a parallel beam surrounding the bull's-eye lens, while light radiated into the backward hemisphere was reflected back through the lamp by the spherical reflector (as in Rogers' arrangement), to be collected by the forward components. The first unit was installed at North.

Fresnel lens. Harbour, Peterhead, in August 1849. Stevenson called this version a "catadioptric holophote", although each of its elements was either purely reflective or purely refractive. In the second version of the holophote concept, the bull's-eye lens and paraboloidal reflector were replaced by a catadioptric Fresnel lens—as conceived by Fresnel, but expanded to cover the whole forward hemisphere. The third version, which Stevenson confusingly called a "dioptric holophote", was more innovative: it retained the catadioptric Fresnel lens for the front hemisphere, but replaced the rear hemispherical reflector with a hemispherical array of annular prisms, each of which used "two" total internal reflections.

Fresnel lens. to turn light diverging from the center of the hemisphere back toward the center. The result was an all-glass holophote, with no losses from metallic reflections.James Timmins Chance modified Thomas Stevenson's all-glass holophotal design by arranging the double-reflecting prisms about a vertical axis. The prototype was shown at the 1862 International Exhibition in London. Later, to ease manufacturing, Chance divided the prisms into segments, and arranged them in a cylindrical form while retaining the property of reflecting light from a single point back to that point. Reflectors of this form, paradoxically called "dioptric mirrors", proved particularly useful for returning light.

Fresnel lens. from the landward side of the lamp to the seaward side.As lighthouses proliferated, they became harder to distinguish from each other, leading to the use of colored filters, which wasted light. In 1884, John Hopkinson eliminated the need for filters by inventing the "group-flashing" lens, in which the dioptric and/or the catadioptric panels were split so as to give multiple flashes—allowing lighthouses to be identified not only by frequency of flashes, but also by multiplicity of flashes. Double-flashing lenses were installed at Tampico (Mexico) and Little Basses (Sri Lanka) in 1875, and a triple-flashing lens at Casquets Lighthouse (Channel Islands).

Fresnel lens. in 1876. The example shown (right) is the double-flashing lens of the Point Arena Light, which was in service from 1908 to 1977.The development of hyper-radial lenses was driven in part by the need for larger light sources, such as gas lights with multiple jets, which required a longer focal length for a given beam-width, hence a larger lens to collect a given fraction of the generated light. The first hyper-radial lens was built for the Stevensons in 1885 by F. Barbier & Cie of France, and tested at South Foreland Lighthouse with various light sources. Chance Brothers (Hopkinson's employers).

Fresnel lens. then began constructing hyper-radials, installing their first at Bishop Rock Lighthouse in 1887. In the same year, Barbier installed a hyper-radial at Tory Island. But only about 30 hyper-radials went into service before the development of more compact bright lamps rendered such large optics unnecessary (see "Hyperradiant Fresnel lens").Production of one-piece stepped dioptric lenses—roughly as envisaged by Buffon—became feasible in 1852, when John L. Gilliland of the Brooklyn Flint-Glass Company patented a method of making lenses from pressed and molded glass. The company made small bull's-eye lenses for use on railroads, steamboats, and docks; such lenses were common in the.

Fresnel lens. United States by the 1870s. In 1858 the company produced "a very small number of pressed flint-glass sixth-order lenses" for use in lighthouses—the first Fresnel lighthouse lenses made in America. By the 1950s, the substitution of plastic for glass made it economic to use Fresnel lenses as condensers in overhead projectors. Fresnel imager Fresnel zone plate Lenticular lens Linear Fresnel reflector Prism lighting − Fresnel anidolic optics M. Born and E. Wolf, "Principles of Optics", 7th Ed., Cambridge, 1999. G.-A. Boutry, 1948, "Augustin Fresnel: His time, life and work, 1788–1827", "Science Progress", vol. 36, no. 144 (October 1948), pp. 587–604;.

Fresnel lens. jstor.org/stable/43413515. J.Z. Buchwald, 1989, "The Rise of the Wave Theory of Light: Optical Theory and Experiment in the Early Nineteenth Century", University of Chicago Press, . J. Elton, 2009, "A Light to Lighten our Darkness: Lighthouse Optics and the Later Development of Fresnel's Revolutionary Refracting Lens 1780–1900", "International Journal for the History of Engineering & Technology", vol. 79, no. 2 (July 2009), pp. 183–244; . A. Fresnel, 1822, "Mémoire sur un nouveau système d'éclairage des phares", read 29 July 1822; reprinted in Fresnel, 1866–70, vol. 3, pp. 97–126; translated by T. Tag as "Memoir upon a new system of lighthouse.

Fresnel lens. illumination", U.S. Lighthouse Society, accessed 26 August 2017; archived 19 August 2016. (Cited page numbers refer to the translation.) A. Fresnel (ed. H. de Sénarmont, E. Verdet, and L. Fresnel), 1866–70, "Oeuvres complètes d'Augustin Fresnel" (3 vols.), Paris: Imprimerie Impériale; vol. 1 (1866), vol. 2 (1868), vol. 3 (1870). T.H. Levitt, 2013, "A Short Bright Flash: Augustin Fresnel and the Birth of the Modern Lighthouse", New York: W.W. Norton, . T. Young (ed. G. Peacock), 1855, "Miscellaneous Works of the late Thomas Young", London: J. Murray, vol. 1. "The Fresnel Lens", "The Keeper's Log", Winter 1985, pp. 12–14. U.S. Coast.

Fresnel lens. Guard, "Aids to Navigation", Washington, DC: U.S. Government Printing Office, 1945. U.S. Coast Guard, "Lighthouses, Lenses, Illuminants, Engineering, & Augustin Fresnel: A Historical Bibliography on Works Published Through 2007". United States Lighthouse Society, especially "Fresnel Lenses". W.A. Britten, "The Fresnel lens" (with photographs). J. Francis, "Fresnel Lens - Maxwell Simulation", 13 April 2009. J. Hare, "How the Fresnel lens works" (5-minute video), Vega Science Trust, 2008.


Question: Which body of water is this place located in or next to?

Instruction: Retrieve a Wikipedia paragraph that provides an answer to the given query about the image.

Front de Seine. Front de Seine is a development in the district of Beaugrenelle in Paris, France, located along the river Seine in the 15th arrondissement at the south of the Eiffel Tower. It is, with the 13th arrondissement, one of the few districts in the city of Paris containing highrise buildings, as most have been constructed outside the city (notably in La Défense).The Front de Seine district is the result of an urban planning project from the 1970s. It includes about 20 towers reaching nearly 100 m of height built all around an elevated esplanade. That esplanade is paved with frescos that.

Front de Seine. can be seen only from the elevated floors of the towers. As opposed to Italie 13, the design of the towers is much more varied. The Hôtel Novotel Paris-Tour Eiffel (formerly known as Hôtel Nikkō), for instance, has red-encircled windows, while the Tour Totem consists of a stack of several glazed blocks.A newly redesigned shopping centre, the Centre commercial Beaugrenelle opened in 2013.Furthermore, while 13th arrondissement towers are predominantly residential and La Défense towers are predominantly commercial, the towers of the Front de Seine are of mixed commercial and residential use. Tour Avant-Seine (1975): 98 m, 32 storeys. Tour Mars.

Front de Seine. (1974): 98 m, 32 storeys. Tour Paris Côté Seine (1977): 98 m, 32 storeys. Tour Seine (1970): 98 m, 32 storeys Tour Espace 2000 (1976): 98 m, 31 storeys. Tour Évasion 2000 (1971): 98 m, 31 storeys. Hôtel Novotel Paris-Tour Eiffel (1976): 98 m, 31 storeys. Tour Totem (1979): 98 m, 31 storeys. Tour Beaugrenelle (1979): 98 m, 30 storeys. Tour Panorama (1974): 98 m, 30 storeys. Tour Perspective 1 (1973): 98 m, 30 storeys. Tour Perspective 2 (1975): 98 m, 30 storeys. Tour Reflets (1976): 98 m, 30 storeys. Tour Rive Gauche (1975): 98 m, 30 storeys. Tour Keller.

Front de Seine. (1970): 98 m, 29 storeys. Tour Cristal (1990): 98 m, 27 storeys. 79 quai André Citroën: 24 storeys. Tour Mirabeau (1972): 18 storeys. Immeuble le Village (1973): 17 storeys. Bureaux Hachette Livre (1969): 12 storeys. Tour Mercure (1973): 12 storeys.Other structures Cheminée du Front de Seine (1971): 130 meters Italie 13 La Défense List of tallest structures in Paris Front de Seine website.


Question: What is the parent organization of this aircraft?

Instruction: I want to find a paragraph from Wikipedia that answers my question about this image.

De Havilland. The de Havilland Aircraft Company Limited () was a British aviation manufacturer established in late 1920 by Geoffrey de Havilland at Stag Lane Aerodrome Edgware on the outskirts of north London. Operations were later moved to Hatfield in Hertfordshire.Known for its innovation, de Havilland was responsible for a number of important aircraft, including the Moth biplane which revolutionised aviation in the 1920s; the 1930s Fox Moth, a commercial light passenger aircraft; the wooden World War II Mosquito multirole aircraft; and the pioneering passenger jet airliner Comet.The de Havilland company became a member of the Hawker Siddeley group in 1960, but.

De Havilland. lost its separate identity in 1963. Later, Hawker Siddeley merged into what is eventually known today as BAE Systems, the British aerospace and defence business. The de Havilland name lives on in De Havilland Canada, which owns the rights to the name and the aircraft produced by de Havilland's former Canadian subsidiary, including the Dash 8 regional airliner previously produced by Bombardier Aerospace.## History.## Origins.In January 1920 Geoffrey de Havilland was working for Airco as technical director and chief designer. BSA bought Airco on 20 January 1920 from George Holt Thomas on the say-so of one BSA director, Percy Martin,.

De Havilland. stronger. As a result, the Comet was extensively redesigned, with oval windows, structural reinforcements and other changes. Rival manufacturers meanwhile heeded the lessons learned from the Comet while developing their own aircraft. The Comet 4 enabled the de Havilland airliner to return to the skies in 1958. By then the United States had its Boeing 707 jet and the Douglas DC-8, both of which were faster and more economical to operate. Orders for the Comet dried up.Hawker Siddeley bought de Havilland in 1960 but kept it as a separate company until 1963. In that year it became the de Havilland.

De Havilland. Division of Hawker Siddeley Aviation and all types in production or development changed their designations from "DH" to "HS". De Havilland's final designs became the Hawker Siddeley Trident (originally the DH.121) and the innovative Hawker Siddley HS.125, originally the DH.125.The DH.121 design was modified to be smaller to fit the needs of one airline—British European Airways. Other airlines found it unattractive and turned to a rival tri-jet, the Boeing 727 which was much the same size as the initial DH.121 design. De Havilland, as Hawker Siddley, built only 117 Tridents, while Boeing went on to sell over 1,800 727s.De Havilland.

De Havilland. was established in March 1939, and work commenced on New Zealand's first aircraft factory at Rongotai. After World War II, the company undertook maintenance and refurbishment work until taken over by Hawker Siddeley International NZ Ltd in 1964. The site of the factory is now part of Wellington International Airport.## de Havilland Engines.As well as a prolific aircraft builder, de Havilland was also a significant producer of aero engines. This went against usual practice: usually engines are designed and produced by a dedicated company though in the UK the Bristol Aeroplane Company had a substantial engine business and Armstrong Whitworth.

De Havilland. Hertfordshire County Council for educational use: the site was then developed as Hatfield Technical College, which is now the College Lane Campus of the University of Hertfordshire. De Havilland was purchased by Hawker Siddeley in 1960 and merged into British Aerospace in 1978. The BAE site then closed in 1993, and the University of Hertfordshire purchased part of the site for the de Havilland Campus. Hatfield's aerospace history is recorded today in the names of local streets, such as Comet Way and Dragon Road.In September 2003 part of the former British aerospace site became the de Havilland campus of the.


Question: What is the closest parent taxonomy of this plant?

Instruction: Retrieve a Wikipedia paragraph that provides an answer to the given query about the image.

Dianthus gratianopolitanus. Dianthus gratianopolitanus, commonly known as the Cheddar pink or clove pink, is a species of plant in the family Caryophyllaceae. It is a herbaceous perennial, hardy to zones 4–8. It grows to a height of 0.5 to 1 feet, blooming from May to June. Flowers are fragrant and rose pink. Grows best in full sun, and has medium water requirements. Overwatering or poor drainage leads to crown rot, and plants do not tolerate wet winter soil conditions.The specific epithet "gratianopolitanus" refers to the ancient Roman name "Gratianopolis" of the modern French city Grenoble. The common name Cheddar pink refers to.

Dianthus gratianopolitanus. the fact that it's native to the Cheddar Gorge in England.It is native to western and central Europe, from the UK to the Ukraine. It became a protected species in the UK in 1975 under the Conservation of Wild Creatures and Wild Plants Act.## Cultivation.Cultivars include 'Feuerhexe' (syn. 'Fire Witch'), 'Grandiflorus' and 'Tiny Rubies'. "Dianthus gratianopolitanus" has gained the Royal Horticultural Society's Award of Garden Merit. GilliflowerMissouri Botanical Garden: Dianthus gratianopolitanus 'Grandiflorus' The Plant List.


Question: What is the highest observed lifespan of this animal?

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Sea otter. with more near Kamchatka and the Commander Islands. After the years of the Great Hunt, the population in these areas, currently part of Russia, was only 750. By 2004, sea otters had repopulated all of their former habitat in these areas, with an estimated total population of about 27,000. Of these, about 19,000 are at the Kurils, 2,000 to 3,500 at Kamchatka and another 5,000 to 5,500 at the Commander Islands. Growth has slowed slightly, suggesting the numbers are reaching carrying capacity.## British Columbia.Along the North American coast south of Alaska, the sea otter's range is discontinuous. A remnant population.

Sea otter. bites, raising concerns that the population had reached a plateau. However, the population increased markedly from 2015 to 2016, with the United States Geological Survey (USGS) California sea otter survey 3-year average reaching 3,272 in 2016, the first time it exceeded the threshold for delisting from the Endangered Species Act (ESA). If populations continued to grow and ESA delisting occurred, southern sea otters would still be fully protected by state regulations and the Marine Mammal Protection Act, which set higher thresholds for protection, at approximately 8,400 individuals. However, ESA delisting seems unlikely due to a precipitous population decline recorded in.


Question: What is the closest parent taxonomy of this animal?

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Mopalia muscosa. Mopalia muscosa, the mossy chiton, is a species of chiton, a polyplacophoran, an eight-plated marine mollusk. It is a northeastern Pacific species which occurs from British Columbia, Canada, to Baja California Mexico.This species is found in the middle and lower intertidal zone on exposed rocky shores. "Mopalia muscosa" can be 40 to 55 (mm) in length. Mossy chitons are often covered by algae, barnacles, and limpets. The chiton's girdle is covered with coarse hair-like bristles or "setae".The visible exterior of the chiton's eight shell plates are typically a drab brown or grey-green, however on the underside the shell plates have.

Mopalia muscosa. a vibrant turquoise blue color. Some mossy chitons are biofluorescent mainly around the girdle and may show a bright glowing green color under ultra-violet or blue light. Mossy chitons typically move about at night or when covered by a high tide in order to graze on the red and green algae of which their diet consists. Young chitons have a planktonic stage and later metamorphose and settle on the bottom as adults.## References.


Question: What is the closest parent taxonomy of this plant?

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Stylophorum diphyllum. Stylophorum diphyllum, commonly called the celandine poppy or wood poppy, is an herbaceous plant in the poppy family (Papaveraceae). It is native to North America, where it is found in the eastern United States and Ontario. Its typical natural habitat is moist forests over calcareous rock, particularly in ravines.It is occasionally cultivated for its bright yellow flowers. The common name is derived from greater celandine ("Chelidonium majus"), a closely related European plant with similar flowers and leaves.## Description."Stylophorum diphyllum" is an herbaceous perennial. It grows to about 1.5 (feet) tall, from underground rhizomes. Leaves are pinnately cut and lobed. They.

Stylophorum diphyllum. grow from the base of the plant, and in a pair at the top of the flowering stems. Apart from its normal sap, "Stylophorum diphyllum" produces a yellow-orange latex that stains.In spring, the deep yellow flowers of the celandine poppy appear as a brilliant display on the forest floor. The flowers have 4 yellow petals, two soon-falling sepals, many yellow-orange stamens, and a single knobby stigma. They appear singly or in umbels of two to four flowers from early spring to early summer. The flowers issue from between a pair of leaves at the top of the flowering stems. They.

Stylophorum diphyllum. produce pollen, but no nectar.After fertilization, a bristly blue-green pod hangs below the leaves. Seeds with white elaiosomes ripen in midsummer and the pod opens by four flaps.## Propagation.Propagation is done by seed or by dividing established clumps in spring. It grows best in moist, high-humus soil, and prefers to be in the shade. Division should be done early in the morning, preferably on a cloudy and mild day.Plants are relatively long lived and readily self-seed under garden conditions.## Conservation."Stylophorum diphyllum" is a conservative species, and is somewhat uncommon throughout its range. Forest clearance is responsible for the loss of.

Stylophorum diphyllum. some stands of this species. As the wood poppy requires semi-shaded conditions, even selective logging can have negative effects by creating large openings that allow too much sun to reach the forest floor.Due to its limited distribution in Canada, it is listed under Ontario's Endangered Species Act, 2007, which protects the species and its habitat. One Ontario population of the wood poppy is in a conservation area. Bioimages.


Question: Which city or region does this island locate in?

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Sumburgh Head. Sumburgh Head is a headland located at the southern tip of the Shetland Mainland in northern Scotland. The head consists of a 100 m high rocky spur and topped by the Sumburgh Head Lighthouse. In the Old Norse language, Sumburgh Head was called "Dunrøstar høfdi", it means "The Head onto the loud tide-race", referring to the noise of Sumburgh Roost. Robert Stevenson was the engineer in charge of building the Sumburgh Head lighthouse. Work started on the building in 1819, and the light was first lit in 1821.## Local ecology.The area is now recognized as a nature reserve by the.

Sumburgh Head. Royal Society for the Protection of Birds. The cliffs are home to large numbers of seabirds with 33,000 puffins being estimated in the year 2000. These numbers have declined sharply: for example only 570 of the birds were counted in 2017. The decline in Puffin numbers also appears to apply to other species native to Sumburgh Head. In as birds, Sumburgh Head has become a popular viewing point for whales and dolphins.## Nearby locations.Sumburgh Airport, which takes its name from the head, lies immediately to the north, and serves as the main airport for the Shetland Islands. Flights from here.

Sumburgh Head. connect to mainland Scotland, the Orkney Islands and Norway. Also close to the Sumburgh Head is the archaeological site of Jarlshof, at which a series of settlements existed dating back to the neolithic period. The tiny settlement of Grutness, which is the terminus of the Shetland Mainland to Fair Isle ferry service, lies 1 (mi) north of Sumburgh Head. Images from around Sumburgh.


Question: What country does this forest belong to?

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Ratargul Swamp Forest. Ratargul Swamp Forest is a freshwater swamp forest located in Gowain River, Fatehpur Union, Gowainghat, Sylhet, Bangladesh. Ratargul was once thought to be the only swamp forest in Bangladesh, and one of the few freshwater swamp forests in the world. Later, more swamp forests namely Jugirkandi Mayabon, Bujir Bon and Lokkhi Baor swamp forest were discovered in Bangladesh. The forest is naturally conserved under the Department of Forestry, Government of Bangladesh.Its area is 3, 325.61 acre including 504 acre declared as the animal sanctuary in 2015. It is known as the Sundarbans of Sylhet. This only swamp forest in Bangladesh.

Ratargul Swamp Forest. be found in the forest till now. 80 percent of the forest area is covered with umbrella of the trees.Two layer of plants can be seen in the swamp forest. The upper layer consists of trees and the lower one consists of intense Schumannianthus dichotomus. The canopy of the plants spreads up to 15 meters of height.Though the forest is natural, the Forestry Department of Bangladesh has planted some watery plants like "Calamus tenuis", "Neolamarckia cadamba", "Barringtonia acutangula", "Calamus tenuis". Banyan Tree is very common in the forest. Besides that, "Barringtonia acutangula", "Dalbergia reniformis", "Crateva religiosa" or "Hygrophila (plant)", "Alstonia.

Ratargul Swamp Forest. scholaris" can also be seen.## Animal diversity.Snake and worm snake can widely be seen in this water-drowned forest. Mongoose can be seen in dry season. Monkey and Water Monitor also resides in the forest. Heron, Egret, Kingfisher, Parrot, Bulbul, Swan, Dove, Water fowl, Eagle and Kite Bird are some of the birds of the swamp forest. Cotton Pygmy Goose and other Migratory birds and Vulture visit the forest in winter. Name of some local fishes available in the forest are Batasio, Rita, Pabda, Rohu etc.## Tourists attraction.Tourists mostly go to see the forest in monsoon. One needs to take permission.


Question: What is this food named after?

Instruction: You have to find a Wikipedia segment that answers the question about the displayed image.

Caprese salad. after the island of Capri, where it is believed to have originated. Two common stories about its origin include it being an homage to the Italian flag or "in the 20th century to appease the palates of vacationing royalty and important politicos."## Variants.Variations of Caprese salad may include Italian dressing or pesto in place of olive oil, or balsamic vinegar in addition to it. Olives may appear, along with arugula (rocket) or romaine lettuce to augment the basil. Oregano or black pepper is sometimes added. Buffalo mozzarella can be substituted for mozzarella to intensify flavor. It can also have pasta.


Question: What is the closest upper taxonomy of this bird?

Instruction: I want to find a paragraph from Wikipedia that answers my question about this image.

Brown pelican. The brown pelican (Pelecanus occidentalis) is a bird of the pelican family, Pelecanidae, one of three species found in the Americas and one of two that feed by diving into water. It is found on the Atlantic Coast from New Jersey to the mouth of the Amazon River, and along the Pacific Coast from British Columbia to northern Chile, including the Galapagos Islands. The nominate subspecies in its breeding plumage has a white head with a yellowish wash on the crown. The nape and neck are dark maroon–brown. The upper sides of the neck have white lines along the base.

Brown pelican. of the gular pouch, and the lower fore neck has a pale yellowish patch. The male and female are similar, but the female is slightly smaller. The nonbreeding adult has a white head and neck. The pink skin around the eyes becomes dull and gray in the nonbreeding season. It lacks any red hue, and the pouch is strongly olivaceous ochre-tinged and the legs are olivaceous gray to blackish-gray.The brown pelican mainly feeds on fish, but occasionally eats amphibians, crustaceans, and the eggs and nestlings of birds. It nests in colonies in secluded areas, often on islands, vegetated land among.

Brown pelican. sand dunes, thickets of shrubs and trees, and mangroves. Females lay two or three oval, chalky white eggs. Incubation takes 28 to 30 days with both sexes sharing duties. The newly hatched chicks are pink, turning gray or black within 4 to 14 days. About 63 days are needed for chicks to fledge. Six to 9 weeks after hatching, the juveniles leave the nest, and gather into small groups known as pods.The brown pelican is the national bird of Saint Martin, Barbados, Saint Kitts and Nevis, and the Turks and Caicos Islands, and the official state bird of Louisiana, appearing.

Brown pelican. on the flag, seal, or coat of arms of each. It has been rated as a species of least concern by the International Union for Conservation of Nature. It was listed under the United States Endangered Species Act from 1970 to 2009, as pesticides such as dieldrin and DDT threatened its future in the Southeastern United States and California. In 1972, the use of DDT was banned in Florida, followed by the rest of the United States. Since then, the brown pelican's population has increased. In 1903, Theodore Roosevelt set aside the first National Wildlife Refuge, Florida's Pelican Island, to.

Brown pelican. protect the species from hunters.## Taxonomy.The brown pelican was described by Swedish zoologist Carl Linnaeus in the 1766 12th edition of his "Systema Naturae", where it was given the binomial name of "Pelecanus occidentalis." It belongs to the New World clade of the genus "Pelecanus".Five subspecies of the brown pelican are recognized. These subspecies are genetically distinct despite a similar phenotype. Different habitats allow to recognize them. : The brown pelican is part of a clade that includes the Peruvian pelican ("P. thagus") and the American white pelican ("P. erythrorhynchos"). The Peruvian pelican was previously treated as a subspecies of.

Brown pelican. the brown pelican, but is now considered a separate species on the basis of its much greater size (around double the weight of the brown pelican), differences in bill color and plumage, and a lack of hybridization between the forms despite a large range overlap. In contrast, hybridization between brown and white pelicans is possible.In 1932, James L. Peters separated the American white pelican and the brown pelican (including the Peruvian pelican) into monospecific subgenera. This separation was also supported by Jean Dorst and Raoul J. Mougin in 1979. The spot-billed pelican and the pink-backed pelican were considered to be.

Brown pelican. sister species by Andrew Elliott in 1992 and Joseph B. Nelson in 2005, and the divergence between the brown and the Peruvian pelicans was found to be the most in the pelican family. In 1993, Paul Johnsgard hypothesized that the pelicans derived from a south Asian or African ancestor, and spread through northern Asia and Australia before finally coming to North America. This hypothesis would imply that, unless the brown pelican and the American white pelican resulted from multiple invasions of North America, they would be sister taxa. However, trees derived from genetic data disagree. In 1990, Charles Sibley and.

Brown pelican. John E. Ahlquist's Unweighted Pair Group Method with Arithmetic Mean (UPGMA) tree based on DNA–DNA hybridization data found that the American white pelican, the pink-backed pelican, the great white pelican, and the Australian pelican were sister species, and the brown pelican was the most divergent of all.## Description.The brown pelican is the smallest of the eight extant pelican species, but is often one of the larger seabirds in their range nonetheless. It measures 1 to 1.52 (m) in length and has a wingspan of 2.03 to 2.28 (m). The weight of adults can range from 2 to 5 (kg), about.

Brown pelican. half the weight of the other pelicans found in the Americas, the Peruvian and American white pelicans. The average weight in Florida of 47 females was 3.17 (kg), while that of 56 males was 3.7 (kg). Like all pelicans, it has a very long bill, measuring 280 to 348 (mm) in length.The nominate subspecies in its breeding plumage has a white head with a yellowish wash on the crown. The nape and neck are dark maroon–brown. The upper sides of the neck have white lines along the base of the gular pouch, and the lower foreneck has a pale yellowish.

Brown pelican. patch. The feathers at the center of the nape are elongated, forming short, deep chestnut crest feathers. It has a silvery gray <dfn>mantle,</dfn> <dfn>scapulars</dfn>, and upperwing coverts (feathers on the upper side of the wings), with a brownish tinge. The lesser coverts have dark bases, which gives the leading edge of the wing a streaky appearance. The uppertail coverts (feathers above the tail) are silvery white at the center, forming pale streaks. The median (between the greater and the lesser coverts), primary (connected to the distal forelimb), secondary (connected to the ulna), and greater coverts (feathers of the outermost, largest,.

Brown pelican. row of upperwing coverts) are blackish, with the primaries having white shafts and the secondaries having variable silver-gray fringes. The tertials (feathers arising in the brachial region) are silver-gray with a brownish tinge. The underwing has grayish-brown remiges with white shafts to the outer primary feathers. The axillaries and covert feathers are dark, with a broad, silver–gray central area. The tail is dark gray with a variable silvery cast. The lower mandible is blackish, with a greenish-black gular pouch at the bottom for draining water when it scoops out prey. The breast and belly are dark, and the legs and.

Brown pelican. feet black. It has a grayish white bill tinged with brown and intermixed with pale carmine spots. The crest is short and pale reddish-brown in color. The back, rump, and tail are streaked with gray and dark brown, sometimes with a rusty hue. The male and female are similar, but the female is slightly smaller. It is exceptionally buoyant due to the internal air sacks beneath its skin and in its bones. It is as graceful in the air as it is clumsy on land.The nonbreeding adult has a white head and neck, and the pre-breeding adult has a creamy.

Brown pelican. yellow head. The pink skin around the eyes becomes dull and gray in the non-breeding season. It lacks any red hue, and the pouch is strongly olivaceous ochre tinged and the legs are olivaceous gray to blackish-gray. It has pale blue to yellowish white irides which become brown during the breeding season. During courtship, the bill becomes pinkish red to pale orange, redder at the tip, and the pouch is blackish. Later in the breeding season the bill becomes pale ash-gray over most of the upper jaw and the basal third of the mandible.The juvenile is similar, but is grayish-brown.

Brown pelican. overall and has paler underparts. The head, neck, and thighs are dusky-brown, and the abdomen is dull white. The plumage of the male is similar to a fully adult female, although the male's head feathers are rather rigid. The tail and flight feathers are browner than those of the adult. It has short, brown upperwing coverts, which are often darker on greater coverts, and dull brownish-gray underwing coverts with a whitish band at the center. The irides are dark brown and the facial skin is bluish. It has a gray bill which is horn-yellow to orange near the tip, with.

Brown pelican. a dark gray to pinkish-gray pouch. It acquires adult plumage at over 3 years of age, when the feathers on the neck become paler, the upperparts become striped, the greater upperwing and median coverts become grayer, and the belly acquires dark spots.The brown pelican is readily distinguished from the American white pelican by its nonwhite plumage, smaller size, and habit of diving for fish from the air, as opposed to co-operative fishing from the surface. It and the Peruvian pelican are the only true marine pelican species.The brown pelican produces a wide variety of harsh, grunting sounds, such as a.

Brown pelican. low-pitched "hrrraa-hrra", during displays. The adult also rarely emits a low croak, while young frequently squeal.## Distribution and habitat.The brown pelican lives on the Atlantic, Gulf, and Pacific Coasts in the Americas. On the Atlantic Coast, it is found from the New Jersey coast to the mouth of the Amazon River. Along the Pacific Coast, it is found from British Columbia to south-central Chile, including the Galapagos Islands. After nesting, North American birds move in flocks further north along the coasts, returning to warmer waters for winter. In the non-breeding season, it is found as far north as Canada. It.

Brown pelican. is a rare and irregular visitor south of the Piura in Peru, where generally it is replaced by the Peruvian pelican, and can occur as a non-breeding visitor south at least to Ica during El Niño years. Small numbers of brown pelicans have been recorded from Arica in far northern Chile. It is fairly common along the coast of California, South Carolina, North Carolina, Georgia, the West Indies, and many Caribbean islands as far south as Guyana. Along the Gulf Coast, it inhabits Alabama, Texas, Florida, Mississippi, Louisiana, and Mexico.The brown pelican is a strictly marine species, primarily inhabiting marine.

Brown pelican. subtidal, warm estuarine, and marine pelagic waters. It is also found in mangrove swamps, and prefers shallow waters, especially near salty bays and beaches. It avoids the open sea, seldom venturing more than 20 miles from the coast. Some immature birds may stray to inland freshwater lakes. Its range may also overlap with the Peruvian pelican in some areas along the Pacific coast of South America. It roosts on rocks, water, rocky cliffs, piers, jetties, sand beaches, and mudflats.## Migration.Most brown pelican populations are resident (nonmigratory) and dispersive (species moving from its birth site to its breeding site, or its.

Brown pelican. breeding site to another breeding site), although some migration is observed, especially in the northern areas of its range, but these movements are often erratic, depending on local conditions. Southwards, they are vagrants (found outside its usual range) in Tierra del Fuego. They have been recorded off the eastern coast of Brazil, in Alagoas. Rare inland vagrants, generally caused by hurricanes or El Niño phenomena, have been reported from the Colombian Andes. They were first recorded in July 2009 at the Interandean Valley where they remained for at least 161 days. There are four records far inland in Amazônia Legal.

Brown pelican. along the Amazon River and its tributaries.## Behavior.The brown pelican is a very gregarious bird; it lives in flocks of both sexes throughout the year. In level flight, brown pelicans fly in groups, with their heads held back on their shoulders and their bills resting on their folded necks. They may fly in a V formation, but usually in regular lines or single file, often low over the water's surface. To exclude water from the nasal passage, they have narrower internal regions of the nostrils.## Feeding.The brown pelican is a piscivore, primarily feeding on fish. Menhaden may account for 90%.

Brown pelican. of its diet, and the anchovy supply is particularly important to the brown pelican's nesting success. Other fish preyed on with some regularity includes pigfish, pinfish, herring, sheepshead, silversides, mullets, sardines, minnows, and topminnows. Brown pelicans residing in Southern California rely especially heavily on pacific sardine as a major food source which can compose up to 26% of their diet, making them one of the top three predators of sardines in the area. Non-fish prey includes crustaceans, especially prawns, and it occasionally feeds on amphibians and the eggs and nestlings of birds (egrets, common murres and its own species).As the.

Brown pelican. brown pelican flies at a maximum height of 60 to 70 (ft) above the ocean, it can spot schools of fish while flying. When foraging, it dives bill-first like a kingfisher, often submerging completely below the surface momentarily as it snaps up prey. Besides its sister species, the Peruvian pelican, this is the only pelican to primarily forage via diving, all other extant pelican merely float on the waters' surface when foraging. Upon surfacing, it spills the water from its throat pouch before swallowing its catch. Only the Peruvian pelican shares this active foraging style (although that species never dives.

Brown pelican. from such a great height), while other pelicans forage more inactively by scooping up corralled fish while swimming on the water surface. It is an occasional target of kleptoparasitism by other fish-eating birds such as gulls, skuas, and frigatebirds. They are capable of drinking saline water due to the high capacity of its salt glands to excrete salt.## Breeding.The brown pelican is a monogamous breeder within a breeding season, but does not pair for life. Nesting season peaks during March and April. The male chooses a nesting site and performs a display of head movements to attract a female. At.

Brown pelican. the proposed nest site, major courtship displays such as head swaying, bowing, turning, and upright (standing on its legs without any support) are performed by both the sexes. They may also be accompanied by low "raaa" calls.Once a pair forms a bond, overt communication between them is minimal. It is a colonial species, with some colonies maintained for many years. Probably owing to disturbance, tick infestation, or alteration in food supply, colonies frequently shift. It nests in secluded area, often on islands, vegetated spots among sand dunes, thickets of shrubs and trees, and in mangroves, although sometimes on cliffs, and.

Brown pelican. less often in bushes or small trees. Nesting territories are clumped, as individual territories may be at a distance of just 1 (m) from each other. They are usually built by the female from reeds, leaves, pebbles, and sticks, and consist of feather-lined impressions protected with a 10 to 25 (cm) rim of soil and debris. They are usually found 3 to 10 (ft) above the ground. Renesting may occur if eggs are lost from the nest early in the breeding season.There are usually two to three, or sometimes even four, oval eggs in a clutch, and only one brood.

Brown pelican. is raised per year. The egg is chalky white, and can measure about 76 (mm) in length and 51 (mm) in width. Incubation takes 28 to 30 days with both sexes sharing duties, keeping the eggs warm by holding them on or under their webbed feet. It takes 28 to 30 days for the eggs to hatch, and about 63 days to fledge. After that, the juvenile leave the nest and gather into small groups known as pods. The newly hatched chicks are pink and weigh about 60 (g). Within 4 to 14 days, they turn gray or black. After.

Brown pelican. that, they develop a coat of white, black or grayish down. Fledging success may be as high as 100% for the first hatched chick, 60% for the second chick, and just 6% for the third chick.The parents regurgitate predigested food for the young to feed upon until they reach their fledging stage. After about 35 days, the young venture out of the nest by walking. The young start flying about 71 to 88 days after hatching. The adults remain with them until some time afterwards and continue to feed them. In the 8- to 10-month period during which they are.

Brown pelican. cared for, the nestling pelicans are fed by regurgitated, partially digested food of around 70 (kg) of fish. The young reach sexual maturity (and full adult plumage) at anywhere from three to five years of age. A brown pelican has been recorded to have lived for over 31 years in captivity.## Predators and parasites.Predation is occasional at colonies, and predators of eggs and young (usually small nestlings are threatened but also occasionally up to fledgling size depending on the size of the predator) can include gulls, raptors (especially bald eagles), spiny-tailed iguanas, alligators, vultures, feral cats, feral dogs, raccoons, fish.

Brown pelican. crows, and corvids. Predation is likely reduced if the colony is on an island. Although it is rare, bobcats have been documented eating both the offspring and injured adults. Predation on adult brown pelicans is rarely reported, but cases where they have fallen prey to bald eagles have been reported. Also, South American sea lions and unidentified large sharks have been observed to prey on adult brown pelicans by seizing them from beneath while the birds are sitting on ocean waters. The invasive red imported fire ant is known to prey on hatchlings. Like all pelicans, brown pelicans are highly.

Brown pelican. sensitive to disturbances by humans (including tourists or fishermen) at their nests, and may even abandon their nests. Due to their size, non-nesting adults are rarely predated. Brown pelicans have several parasitic worms such as "Petagiger", "Echinochasmus", "Phagicola longus", "Mesostephanus appendiculatoides", "Contracaecum multipapillatum", and "Contracaecum bioccai", from its prey diet of black mullets, white mullets, and other fish species.## Relationship with humans.The brown pelican is now a staple of crowded coastal regions and is at some risk by fishermen (monofilament fishing line and hooks) and boaters. In the early twentieth century, hunting was a major cause of its death, and.

Brown pelican. people still hunt adults for their feathers and collect eggs on the Caribbean coasts, in Latin America, and occasionally in the United States, even though it is protected under the Migratory Bird Treaty Act of 1918.## Depictions in culture.The brown pelican is the national bird of Saint Martin, Barbados, Saint Kitts and Nevis, and the Turks and Caicos Islands. In 1902, it was made a part of the official Louisiana seal and, in 1912, a pelican and her young became part of the Flag of Louisiana as well. One of Louisiana's state nicknames is "The Pelican State", and the brown.

Brown pelican. pelican is the official state bird of Louisiana. It is one of the mascots of Tulane University, present on its seal, and is also present on the crest of the University of the West Indies. The National Basketball Association (NBA)'s New Orleans Pelicans are named in the honor of the brown pelican.In the 1993 film "The Pelican Brief", based on the novel of the same name by John Grisham, a legal brief speculates that the assassins of two supreme court justices were motivated by a desire to drill for oil on a Louisiana marshland that was a habitat of the.

Brown pelican. endangered brown pelican. In the same year, "Jurassic Park" showed a pod of brown pelicans at the end of the film. In 1998, American conductor David Woodard performed a requiem for a California brown pelican on the seaward limit of the berm of a beach where the animal had fallen. In the 2003 Disney/Pixar film "Finding Nemo", a brown pelican (voiced by Geoffrey Rush in an Australian accent) was illustrated as a friendly, virtuous talking character named Nigel.## Status and conservation.Since 1988, the brown pelican has been rated as least concern on the IUCN Red List of Endangered species based.

Brown pelican. on its large range—greater than 20,000 km2 (7700 mi2)—and an increasing population trend. The population size is also well beyond the threshold for vulnerable species. The nominate race population is thought to number at least 290,000 in the West Indies, and 650,000 globally. In 1903, Theodore Roosevelt set aside Pelican Island, now known as Pelican Island National Wildlife Refuge, to solely protect the brown pelican from hunters.Starting in the 1940s with the invention and extensive use of pesticides such as DDT, the brown pelican population had drastically declined due to a lack of breeding success. By the 1960s, it had.

Brown pelican. almost disappeared along the Gulf Coast and, in southern California, it had suffered almost total reproductive failure, due to DDT usage in the United States. The brown pelican was listed under the United States Endangered Species Act from 1970 to 2009. A research group from the University of Tampa, headed by Ralph Schreiber, conducted research in Tampa Bay, and found that DDT caused the pelican eggshells to be too thin to support the embryo to maturity. In 1972, the United States Environmental Protection Agency (USEPA) banned DDT usage in the United States and limited the use of other pesticides. There.

Brown pelican. has been a decline in chemical contaminant levels in brown pelican eggs since then, and a corresponding increase in its nesting success. It became extinct in 1963 in Louisiana. Between 1968 and 1980, the Louisiana Department of Wildlife and Fisheries' reintroduction program re-established the brown pelican, and its population numbers in California and Texas were restored due to improved reproduction and natural recolonization of the species. By 1985, its population in the eastern United States, including Florida, Georgia, South Carolina, Alabama, and northward along the Atlantic Coast, had recovered and the species was removed from the Endangered Species List. Its.

Brown pelican. population has grown by about 68% per decade over a period of 40 years in North America, and this trend appears to be continuing. It is still listed as endangered in the Pacific Coast region of its range and in the southern and central United States. Although the United States Gulf Coast populations in Louisiana and Texas are still listed as endangered, they were recently estimated in 2009 about 12,000 breeding pairs. Since that time the Deepwater Horizon oil spill has adversely affected populations, and current population figures are not available.## Indicator species.The brown pelican abundance has steadily recovered from.

Brown pelican. the drastic population decreases in the 1940s, however bottom up control threatens the Southern California populations as food sources become diminished. It is common for forage fish populations to experience regular fluctuations, however there has been a consistent decrease in the Pacific sardine population beginning as early as 2014. In 2019 these declines were found to have reached levels which were a mere 10% of the highest reported abundances. Fluctuations in sardine populations have largely been attributed to bottom-up control, primarily including climate variability and ocean temperature. The significant decrease in pacific sardine population can be linked to the levels.

Brown pelican. of nitrogen within their habitat, a limiting factor in plankton production. Pacific sardines in the California current system rely on wind driven upwelling to push cooler, nitrogen rich waters towards the surface, maintaining a sustainable, nutrient abundant environment. Continued environmental disruptions, such as El Niño, rising ocean temperatures, and increased commercial fishing, have drastic effects on nutrient cycling within the California current system, leading to lasting impacts on Pacific sardine productivity and reproductive success.The brown pelican has been predicted to have high vulnerability to declining sardine populations . At the lowest levels of sardine abundance, the brown pelican population has.

Brown pelican. been predicted to decline up to 50%. Even with a more moderate decline in sardine abundance (50% relative abundance), brown pelicans have been predicted to decrease by up to 27%. A recent decline in brown pelican breeding success coincides with the population decline of the Pacific sardine. Between 2014 and 2016, brown pelicans experienced a continuous breeding failure. These breeding failures have been characterized by decreased numbers of pelicans arriving at nesting colonies, large scale abandonment and early migration due to an inability to feed hatchlings, and sub-optimal breeding by those who do attempt to breed. Breeding success is greatly.

Brown pelican. reduced by oceanic anomalies, specifically warm-phase anomalies that increase the intensity of upwellings. Increased upwellings disrupt marine productivity and forage fish availability. These trends have important implications for the health and conservation of brown pelicans, as well as other seabirds.Seabirds have become increasingly important as an indicator species. They are often used in order to indirectly track changes in fish stocks, ecosystem health, and climate change. Environmental changes tend to have fast acting impacts on marine bird populations due to the simplicity of their trophic cascade, allowing for complex, long term trends in ecosystem health and resources to be easily.

Brown pelican. realized and tracked. Brown pelicans have proven to be a useful indicator in determining the effects of the well established fishing industry in Southern California. Sardine fishery in the Gulf of California has been showing signs of overfishing since the early 1990s. Sardine population and abundance, however, is difficult to monitor and obtain indicators for. Since lacking food availability has negative implications for breeding success in seabirds, seabird diet and breeding success has been used to indirectly measure the population status of the fish they feed on. This model has been shown to work using brown pelicans as an indicator.

Brown pelican. species. As the proportion of sardines in the brown pelicans diet decreases, the success of fisheries declines to a lesser extent. When eventually the sardine abundance has declined enough for brown pelicans to move away and begin feeding on other forage fish, commercial fishing still would be fishing in significant numbers. This indicates that even when fisheries are not seeing signs of declining sardine abundance, brown pelicans may have already been affected to the point of locating other food sources. This availability of sardines may decline even further during El Niño anomalies, when thermoclines prevent brown pelicans from reaching their.

Brown pelican. prey. Brown pelican diet will mostly indicate declines in sardine abundance for fisheries during the same season, as brown pelicans feed mostly on the same adult fish that are commercially fished. Although brown pelicans serve as an important indicator species for fisheries, declining sardine abundance due to both climate changes and overfishing have huge implications on overall ecosystem health, within or outside the individual trophic cascade. Field Guide Page on Flickr.


Question: For the animal in the image, what do they commonly eat?

Instruction: Retrieve a Wikipedia paragraph that provides an answer to the given query about the image.

Elephant. tall. As with other megaherbivores, including the extinct sauropod dinosaurs, the large size of elephants likely developed to allow them to survive on vegetation with low nutritional value. Their limbs grew longer and the feet shorter and broader. The feet were originally plantigrade and developed into a digitigrade stance with cushion pads and the sesamoid bone providing support. Early proboscideans developed longer mandibles and smaller craniums while more derived ones developed shorter mandibles, which shifted the head's centre of gravity. The skull grew larger, especially the cranium, while the neck shortened to provide better support for the skull. The increase.

Elephant. in size led to the development and elongation of the mobile trunk to provide reach. The number of premolars, incisors and canines decreased.The cheek teeth (molars and premolars) of proboscideans became larger and more specialized, especially after elephants started to switch from C3-plants to C4-grasses, which caused their teeth to undergo a three-fold increase in teeth height as well as substantial multiplication of lamellae after about five million years ago. Only in the last million years or so did they return to a diet mainly consisting of C3 trees and shrubs. The upper second incisors grew into tusks, which varied.

Elephant. gait similar to running. In walking, the legs act as pendulums, with the hips and shoulders rising and falling while the foot is planted on the ground. With no "aerial phase", the fast gait does not meet all the criteria of running, although the elephant uses its legs much like other running animals, with the hips and shoulders falling and then rising while the feet are on the ground. Fast-moving elephants appear to 'run' with their front legs, but 'walk' with their hind legs and can reach a top speed of 25 (km/h). At this speed, most other quadrupeds are.

Elephant. impede dehydration and improve thermal regulation over a long period of time.## Behaviour and life history.## Ecology and activities.The African bush elephant can be found in habitats as diverse as dry savannahs, deserts, marshes, and lake shores, and in elevations from sea level to mountains above the snow line. Forest elephants mainly live in equatorial forests but will enter gallery forests and ecotones between forests and savannahs. Asian elephants prefer areas with a mix of grasses, low woody plants, and trees, primarily inhabiting dry thorn-scrub forests in southern India and Sri Lanka and evergreen forests in Malaya. Elephants are herbivorous.


Question: How many offspring can this bird produce at the same time?

Instruction: Determine the Wikipedia snippet that matches the question of this image.

Northern waterthrush. locality from Latin "novus", "new" and "Eboracum", York.## Description.The northern waterthrush is a large New World warbler (and not a thrush, despite the name). It has a length of 12 – 15 (cm), wingspan of 21 – 24 (cm) and weighs between 13 and 25 (g) Among standard measurements, the wing chord is 6.8 to 8.2 (cm), the tail is 4.5 to 5.7 (cm), the bill is 1.1 to 1.2 (cm) and the tarsus is 1.9 to 2.3 (cm). On the head, the crown is brown with a white supercilium. The bill is pointed and dark. The throat is lightly.