Pteroclididae vs bird family

Pteroclididae and bird family both are nouns.

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

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

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

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