Megapodiidae vs bird family

Megapodiidae and bird family both are nouns.

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

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

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

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