| Noun | 1. | bird family - a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wingsfamily Turdidae, Turdidae - thrushes; in some classifications considered a subfamily (Turdinae) of the family Muscicapidae family Sylviidae, Sylviidae - in some classifications considered a subfamily (Sylviinae) of the family Muscicapidae: Old World (true) warblers; American kinglets and gnatcatchers | |