What is the evolutionary history of birds?

Birds are the third main evolutionary branch of the Sauropsids (reptiles), the first are nerchosauri reptiles and the second is archosaurs (which includes dinosaurs and crocodiles). Birds are highly developed archosaurs, so they don't look like their closest living relatives, crocodile. The evolutionary history of birds is long and complex because they are the latest main branch of the Sauropsid group. Previously, it was assumed that birds could develop from crocodiles or archosaur of tribal groups in the early mesozoic. This is a scientific consensus that has been formed relatively recently - for many decades, an unknown evolutionary history of birds and a highly questionable topic has been an unknown. The notion that the evolutionary history of birds began with dinosaurs was designed by dedicated Darwin Thomas Henry Huxley, shortly after publishing from 1859 from 1859, but it was not confirmed until the 1960s.

The evolutionary history of birds is rooted in feathered dinosaurs, animals that we did not even know that they existed as long as in China at the age of 90. Some dinosaurs seem to have grown so long that they could use them to slide and finally fly. This has led to a number of evolutionary changes in the direction of modern birds-drunk bones, higher metabolic speeds, beaks, etc. The development of birds from the creeping line is an example of a warm creature developing from cold-blooded creatures, something that also happened when mammals developed from cold synapsids

The most famous fossil, which refers to evolutionary connection between dinosaurs and birds is Archeopteryx , a dinosaur bird who lived in the middle mesozoice. It includes numerous medium functions between dinosaurs and birds. Although it had feathers, wide wings and the ability to fly, most of its anatomy had more in common with dinosaurs such as small teeth, dlOut bone tail and clawed limbs.

The evolutionary history of birds has experienced a new beginning when the main predators and competitors of birds, dinosaurs and pterosaurs (flying reptiles) disappeared and left the sky open. Today, birds are the main source of food for carnivorous or omnipotent mammals such as felines and people.