About Arremon dorbignii P.L.Sclater, 1856
Description: The adult male moss-backed sparrow (Arremon dorbignii) has a mostly black head, with a white supercilium that runs from the lores to the back of the head, and a narrow gray streak on the crown. Its neck is gray, and its back, wings, and tail are dull olive green. The underside is white with grayish edges, and has a narrow black band across the upper chest. The adult female is similar to the male, but is duller overall; the crown stripe is olive, and the underparts are buffy with brown flanks. Juveniles are similar to adults but also duller overall. The moss-backed sparrow shares the striking orange bill of the saffron-billed sparrow, which it was formerly grouped under. Six specimens collected from Argentina had a mean weight of 22.1 g (0.78 oz). Distribution and habitat: The moss-backed sparrow is found from the La Paz, Cochabamba, and Santa Cruz Departments of Bolivia south into northwest Argentina, reaching as far south as Catamarca Province. It primarily inhabits primary and second-growth tropical deciduous forest, and is also often found near forest edges, interior forest openings, and along waterways. Its elevational range extends from sea level up to 1,400 m (4,600 ft).
