Psittacus vs bird genus

Psittacus and bird genus both are nouns.

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

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

Psittacus: type genus of the Psittacidae: usually restricted to the African grey
bird genus: a genus of birds

Psittacus (noun)	bird genus (noun)
type genus of the Psittacidae: usually restricted to the African grey	a genus of birds