This small finch has a heavy bill. The Peru species account records it in riverside grass and overgrown fallow fields; a specialist account describes it as feeding on seeds.
The male is black with a thick black bill and a white patch in the wing. The female is rich brown and has a similarly thick bill, but lacks the white wing patch.
It has been recorded in tall grass beside rivers, overgrown fallow fields, and scrub. Species accounts describe it as eating seeds.
An extinction-risk assessment has not been added yet.