Opisthocomidae vs bird family

Opisthocomidae and bird family both are nouns.

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

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

Opisthocomidae: comprising the hoatzins
bird family: a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings

Opisthocomidae (noun)	bird family (noun)
comprising the hoatzins	a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings