Struthionidae vs bird family

Struthionidae and bird family both are nouns.

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

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

Struthionidae: tall terrestrial birds: ostriches
bird family: a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings

Struthionidae (noun)	bird family (noun)
tall terrestrial birds: ostriches	a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings