Members of .
Birds are tetrapods and descendants of , a group that also includes the infamous and . Birds share with at least some of those dinosaurs the otherwise unique body coverings we call .
Because birds are to , they display numerous adaptations that result in their light . These include hollow and the loss of various features such as .
Birds, like mammals, are also and possess . Birds, like higher primates, are also highly , as befits an animal that must possess obstacle avoidance abilities!
We actually share a number of characteristics with birds that stem to a large degree from a dominance among our of the and a related need to quickly navigate complex, especially environments.
Video (Nice introduction to birds, their evolution, and their functioning)