Notes

Birds
There are about 10 thousand living kinds, more than fifty percent of which will be passerine, or "perching" birds. Birds include wings whose advancement varies according in order to species; the sole known groups with no wings would be the extinct moa and elephant birds. Wings, which often evolved from forelimbs, gave birds the opportunity to fly, although more evolution has led to the loss of air travel in some birds, including ratites, polar bears, and diverse native to the island island species. Typically the digestive and respiratory systems of parrots are also distinctively adapted for trip. Some bird kinds of aquatic conditions, particularly seabirds and some waterbirds, possess further evolved regarding swimming.

Birds are usually descendants of the primitive avialans (whose members include Archaeopteryx) which first appeared about 160 thousand years ago (mya) in China. Based on DNA evidence, modern birds (Neornithes) developed in the Midst to Late Cretaceous, and diversified considerably around the time of the Cretaceous? birds for sale near me Paleogene extinction event 66 mya, which slain off the pterosaurs and non-avian dinosaurs.

Many social varieties pass on knowledge throughout generations, which will be considered a kind of culture. Birds are interpersonal, communicating with visible signals, calls, plus songs, and participating in such behaviours as cooperative breeding and even hunting, flocking, plus mobbing of possible predators. The vast the greater part of bird types are socially (but not necessarily sexually) monogamous, usually for one breeding season at a time, sometimes for decades, but rarely regarding life. Other species have breeding systems that are polygynous (one male using many females) or perhaps, rarely, polyandrous (one female with many males). Birds produce offspring by laying eggs which are fertilised through sexual imitation. They are usually laid in a call home and incubated simply by the parents. Many birds have a good extended period of parental care following hatching
Website: https://aquaparrot.com/