genus Colaptes vs bird genus

genus Colaptes and bird genus both are nouns.

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

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

genus Colaptes (noun)	bird genus (noun)
a genus of Picidae, containing the flickers (Colaptes)	a genus of birds