[Hmmm... An interesting concept, certainly. Where to start...]

Warm-blooded, egg-laying creatures with some form of feathers and beaks that walk upright rather than on all fours. Allowances can be made for teeth, as many dinosaurs were ancestors to birds, such as the velociraptor, though modern day birds no longer have them. Finally, their bones are light, yet strong, and while many fly, there are large flightless birds as well as aquatic birds such as penguins.

[His thoughts then flash through several examples. Crows, owls, penguins, ostriches, and even the humble kiwi.]