Pelecanoididae vs bird family

Pelecanoididae and bird family both are nouns.

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

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

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

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