family Ardeidae vs bird family

family Ardeidae and bird family both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Ardeidae	Yes	No	No	No
bird family	Yes	No	No	No

As nouns, bird family is a hypernym of family Ardeidae; that is, bird family is a word with a broader meaning than family Ardeidae:

family Ardeidae: herons, egrets, night herons, bitterns
bird family: a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings

family Ardeidae (noun)	bird family (noun)
herons, egrets, night herons, bitterns	a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings