Bucerotidae vs bird family

Bucerotidae and bird family both are nouns.

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

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

Bucerotidae: hornbills
bird family: a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings

Bucerotidae (noun)	bird family (noun)
hornbills	a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings