Long-tailed finch length. It has a prominent roundish black bib on its throat and upper chest and a long pointed black tail. It has pinkish brown upperparts with paler plumage below its bib over the lower breast and abdomen. It has a grey head, a white ear-patch, and black lores. It has black patches on its upper flanks and its rump and undertail coverts are white. The beak colour of the adult long-tailed finch varies from red through orange to yellow. The subspecies with red beaks is sometimes called Heck's grass finch "Poephila acuticauda hecki", and the nominate subspecies with orange or
Cuzco brush finch gray with grayish-white abdomens. Males and females are extremely similar in colour, with the female being slightly smaller. Adults: Male: wing , tail 78 mm, tarsus , culmen Female: wing , tail 72 mm, tarsus 25 mm, culmen 15 mm The Cuzco brush finch is a species in the genus "Atlapetes" - along with 30 others. This genus is in the under-class Aves, order passeriformes (songbirds) and family Emberizidae. The Cuzco brush finch has been denoted in 1919 by Chapman as "Atlapetes canigenis". In 1938 "canigenis" was categorized as a subspecies of slaty brush finch. However, "Canigenis" is in a