Diomedeidae vs bird family

Diomedeidae and bird family both are nouns.

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

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

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

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