Enantiornithes. Artwork of prehistoric birds from the group Enantiornithes which existed 129-66 million years ago. Seen here flying in flocks and perched on top of Parasaurolophus dinosaurs. With well developed wings and feathers Enantiornithes were capable of powered flight. They also possessed clawed finger digits and toothed jaws similar to their non bird-like dinosaur ancestors. This species and numerous other feathered fossils support the theory that modern day birds evolved from prehistoric theropod dinosaurs.