grass finch vs Poephila

grass finch and Poephila both are nouns.

Word	Noun	Adjective	Verb	Adverb
grass finch	Yes	No	No	No
Poephila	Yes	No	No	No

grass finch (noun)	Poephila (noun)
usually brightly-colored Australian weaverbirds; often kept as cage birds	grassfinches
common North American finch noted for its evening song