Zigong dinosaur growth and reproduction, nesting, spawning and taking care of the next generation are also one of the dinosaurs’ life content. The dinosaur’s nest is usually a mud or sand pit. Some dinosaurs gather their nests in breeding areas, and certain special species return to the same nesting site year after year to breed. Some female dinosaurs leave after laying eggs and let the eggs hatch themselves; while some female dinosaurs stay by the nest to protect the eggs and the newly hatched baby dinosaurs.
Dinosaurs, like most birds and reptiles, are likely to have a single row of cloaca-a place where feces, urine, and germ cells are excreted together. If this is the case, we can speculate that the male and female dinosaurs align with their cloaca when they mate, and then the male dinosaur enters the cloaca of the female dinosaur for mating. However, male dinosaurs may not have penis. If so, they may reproduce by spraying semen to the cloaca of the female dinosaur, just like some birds. Experts call this mating method as “colony kiss “.