Green-backed Twinspot

An unusual small sparrow of dry country. Males have a yellow head and underparts and a chestnut back. Females are much plainer, sandy brown on the back and pale below with a yellow wash. Found in dry thorn savanna, thorn scrub, and semi-desert. Nests colonially, and usually found in flocks, sometimes large, and sometimes mixed with other bird species. Similar to Arabian Golden Sparrow, but almost does not overlap in range. Male is separated by his chestnut back, and females by being duller and less yellow. The common calls include chirps and chatters. 

Chunky medium-sized tanager found in Andean cloud forests from Colombia to Bolivia. Yellow below and black above with blue patch on shoulder and blue edges on wing and tail feathers. Conspicuous yellow crown. Some variation across range; population on east slope of Andes in Colombia and Ecuador shows mossy green back. Generally quite common; a core member of mixed-species flocks from 1,200–2,500 m. Can be found in forests, edges, and gardens.

Flamboyantly plumaged little gamebird, with pumpkin-orange head and breast, brown wings, and smart black-and-white scaling on back and sides. Listen for its exuberant song, a series of accelerating whistles that eventually collapses into harsh, coarse notes, as though its voice had broken. Inhabits lowlands and middle-elevation forests, where it can be difficult to see as it forages on the ground, typically singly or in pairs; most readily seen at established feeding stations.