Gallus vs bird genus

Gallus and bird genus both are nouns.

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

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

Gallus (noun)	bird genus (noun)
common domestic birds and related forms	a genus of birds