Gough island finch Rowettia goughensis

A large striking finch with a dagger-like bill and different looking sexes. Male is mostly olive with a black throat and yellow eye-ring and moustache; female is brownish and lacks the black throat. Juvenile similar to female but heavily streaked. A critically endangered species endemic to Gough Island, where it is the only songbird; pairs and family groups are widespread on the island, preferring areas above 300 meters of elevation. Male sings a high-pitched whistle, while female answers with a chatter.