Birds; feathered creatures, considered as a course of vertebrates,next after animals: sometimes united with Reptilia in a superclass Sauropsida, distinguished in the one-hand from Mammalia, and on one other from Ichthyopsida, or amphibians and fishes together.
wild birds; feathered pets, thought to be a class of vertebrates,next after mammals: occasionally united with Reptilia in a superclass Sauropsida, distinguished in the one hand from Mammalia, as well as on the other from Ichthyopsida, or amphibians and fishes together.
How would you define aves?