The origin of birds refers to the initial stages in the evolution of birds. The scientific consensus is that birds are a group of theropod dinosaurs that evolved during the Mesozoic Era.
On July 31, 2014, scientists reported details of the evolution of birds from theropod dinosaurs.
Fossils of dromaeosaurids more primitive than Velociraptor are known to have had feathers covering their bodies and fully developed feathered wings.
There may be contradiction to this theory but fossil records prove that the dinosaur has feathers in late Cretaceous period
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