Feathered Dinosaurs and the Origins of Flight
4. Deinonychus sculpture head shot. With a mouth full of teeth,
Deinonychus may not appear to be very bird-like, but fossils now
indicate that it was a bird. Sculpture by Stephen Czerkas, © 2002.
5. Deinonychus sculpture full body. Deinonychus was
initially thought to be a bird-like dinosaur that represented what the
ancestors of birds were like before flight had fully evolved. It is now
known that Deinonychus had ancestors that were capable of flying
which means that it was really a bird which had lost the ability to fly.
Sculpture by Stephen Czerkas, © 2002.