EVOLUTION OF BIRDS

EVOLUTION OF BIRDS

We think that birds evolved from flying dinosaurs that lived in china during the early Cretaceous period,this is wrong.This dinosaurs disappeared 65mya,so how they evolved?The story starts back in the Jurassic with a creature called Ornitholestes,a 2m carnivore that that hunt lizards and mammals and scavenge on eggs.But he have something,the reason that is the ancestor of all birds.His hands are crushed,like all birds today when they landed.His hands became more crushed and at the behind side of them,feathers have evolved for the first time in dinosaurs.In their shadows the gliding dinosaurs evolved but they will vanish.65.5mya:All around the world small theropod dinosaurs have evolved,like Deinonychus in N.America,Velociraptors in Mongolia and the most related to birds,the Alaskan Troodons in Alaska.All of them have feathers and with their large brains they survived the extinction to come and leave behind the small bird like dinosaurs that lived only in China.But right after the dinosaurs they didn’t evolved to modern birds,to 2-3m tall birds that can’t fly but ruled the Earth,the 2m tall birds called Gastornis evolved finally to modern birds from lose size and their wing’s suffuse.But this birds rule every continent except S.America,a very alone and have unique animals continent.Here 3m tall terror birds rule this continent until the saber tooth cats came from N.America and vanished them.Today the birds are as we see them,some are great aerial predators like the falcon,the eagle,scavengers like vulture,some of them live as great swimmers like the penguins or some of them can’t fly like the ostrich.The biggest wingspan is held by the Marabou Stork’s,is over 4m in wingspan and is live now on Africa,meny birds will come,some will can’t fly other may can fly,until as all creatures disappeared.