genus Pernis vs bird genus

genus Pernis and bird genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Pernis	Yes	No	No	No
bird genus	Yes	No	No	No

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

genus Pernis: a common European bird of prey; dull brown with white-streaked underparts
bird genus: a genus of birds

genus Pernis (noun)	bird genus (noun)
a common European bird of prey; dull brown with white-streaked underparts	a genus of birds