Males have green plumage, a white bill, and pale purple legs. The species is known for mimicking the song of the Rock Firefinch, its host. It is listed from Nigeria, with an additional observation from northern Cameroon.
Breeding males are described as green with brown wings, a white bill, and pale purple legs. The account does not establish that females or young share this appearance, so these traits are presented for males.
It is a brood parasite of the Rock Firefinch and mimics that host’s descending trill and whistle-like notes. A 2009 Cameroon observation found the birds with their host in rocky, grassy hill habitat.
An extinction-risk assessment has not been added yet.