Podicipedidae vs bird family

Podicipedidae and bird family both are nouns.

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

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

Podicipedidae: coextensive with the order Podicipitiformes
bird family: a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings

Podicipedidae (noun)	bird family (noun)
coextensive with the order Podicipitiformes	a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings