Spheniscidae vs bird family

Spheniscidae and bird family both are nouns.

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

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

Spheniscidae: comprising all existing penguins
bird family: a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings

Spheniscidae (noun)	bird family (noun)
comprising all existing penguins	a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings