genus Anhinga vs bird genus

genus Anhinga and bird genus both are nouns.

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

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

genus Anhinga (noun)	bird genus (noun)
type genus of the Anhingidae	a genus of birds