Slender, long-tailed bird found only from Cerro Duida, a tepui (table mountain) in southern Venezuela. It is so remote and inaccessible that the bird has not been observed by ornithologists since the original specimens were collected in the 1920s. It has olive-green wings, brownish breast, pale throat, yellow bill, and dark streaking on the back and crown. Very similar to Wedge-tailed Grass-Finch, but slightly larger. Inhabits grassy savanna, and voice is unknown.