Dinornithidae vs bird family

Dinornithidae and bird family both are nouns.

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

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

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

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