genus Centropus vs bird genus

genus Centropus and bird genus both are nouns.

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

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

genus Centropus: a genus of Cuculidae, commonly known as coucals (Centropus)
bird genus: a genus of birds

genus Centropus (noun)	bird genus (noun)
a genus of Cuculidae, commonly known as coucals (Centropus)	a genus of birds