Pelecanidae vs bird family

Pelecanidae and bird family both are nouns.

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

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

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

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