The earliest feathered dinosaur, Archaeopteryx (plumage not shown). Drawn from specimen at Humboldt Museum, Berlin. The skull is about six inches long.
An ostrich-like dinosaur, Struthiomimus; in the classic posture indicative of brain damage and asphyxiation at death. Drawn from specimen at American Museum of Natural History. The skull is about a foot long.
Warm or cold blooded didn't matter; protoceratops was eating velociraptor for dinner, and
this fish didn't get a chance to swallow, that's how SUDDEN it was.