Yellow-green Brushfinch

The yellow-green brushfinch is about 17 to 18 cm (6.7 to 7.1 in) long. The sexes have the same plumage. Adults have a black crown and the rest of their head is brownish gray mottled with black. Their back is olive green and their rump and uppertail coverts are a darker olive green. Their wings and tail are black but for bright yellow at the bend of the wing. Their breast and belly are yellowish olive green, their undertail coverts olive green, and their flanks a darker olive green. They have puffy lemon yellow feathers on their tibiae. Voice: The yellow-green brushfinch's song is a "hurried jumble of tinkling, sweet, squeaky chattering notes". Pairs often sing in duet. The species' call is a "dry peenk".