Hydrobatidae vs bird family

Hydrobatidae and bird family both are nouns.

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

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

Hydrobatidae: storm petrels
bird family: a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings

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