genus Gyps vs bird genus

genus Gyps and bird genus both are nouns.

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

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

genus Gyps: a genus of Accipitridae, containing 8 extant species of Old World vultures (Gyps)
bird genus: a genus of birds

genus Gyps (noun)	bird genus (noun)
a genus of Accipitridae, containing 8 extant species of Old World vultures (Gyps)	a genus of birds