Feathers, essential for thermoregulation, flight, and communication in birds, originate from simple appendages known as proto-feathers, which were present in certain dinosaurs.By studying embryonic ...

membranous wings that they move by altering their body shape. Birds possess strong wings made of bone and muscle, covered with overlapping feathers, and they use powerful muscles to flap their wings.

Paleontologists continue to discuss the possibility of their even earlier presence in the common ancestor of dinosaurs and pterosaurs (the first flying vertebrates with membranous wings) around 240 ...

Feathers are among the most complex cutaneous ... of dinosaurs and pterosaurs (the first flying vertebrates with membranous wings) around 240 million years ago. Proto-feathers are simple ...