Psittacula vs bird genus

Psittacula and bird genus both are nouns.

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

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

Psittacula: a genus of Psittacidae, commonly known as Afro-Asian ringnecked parakeets (Psittacula)
bird genus: a genus of birds

Psittacula (noun)	bird genus (noun)
a genus of Psittacidae, commonly known as Afro-Asian ringnecked parakeets (Psittacula)	a genus of birds