Noun | 1. | ![]() bird family - a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings Apodiformes, order Apodiformes - swifts; hummingbirds swift - a small bird that resembles a swallow and is noted for its rapid flight genus Apus, Apus - type genus Chateura, genus Chateura - a genus of Apodidae Collocalia, genus Collocalia - a genus of Apodidae |