Duida Grass-Finch

The Duida grass finch is about 22 cm (8.7 in) long. It has a long pointed tail and a moderately thick bill. The sexes have the same plumage. Adults have a blackish forehead and a blackish crown with thin brown streaks. They have a mostly dark brownish face with darker lores, a whitish supercilium just to the eye, and a thin whitish eye-ring. Their mantle and scapulars are olive with bold blackish streaks. The rest of their upperparts are mostly steaked with even amounts with cinnamon-brown and blackish. Their wings are mostly brownish with wide bright yellow-green edges. Their tail feathers have dark centers and brown edges. Their throat is whitish buff. They have a brownish band across the breast, buff flanks, and a white belly; the flanks and vent have darker streaks. They have a dark brown iris, a yellowish bill with a blackish culmen, and brownish legs feet. Juveniles are similar to adults with but with streaks on the breast and a buffy belly.

The Duida grass finch is known only from Venezuela's Cerro Duida, a tepui in central Amazonas state. It inhabits savanna at elevations between 1,300 and 2,100 m (4,300 and 6,900 ft).

The Duida grass finch is assumed to be a sedentary year-round resident. Because it is not known in life, there is no information on any aspect of its biology.