genus Coscoroba vs bird genus

genus Coscoroba and bird genus both are nouns.

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

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

genus Coscoroba: a genus of Anatidae, containing the Coscoroba swan (Coscoroba)
bird genus: a genus of birds

genus Coscoroba (noun)	bird genus (noun)
a genus of Anatidae, containing the Coscoroba swan (Coscoroba)	a genus of birds