Buff-winged Cinclodes

The buff-winged cinclodes is 15 to 19.4 cm (5.9 to 7.6 in) long and weighs 29 to 33 g (1.0 to 1.2 oz). It is a small cinclodes with a shortish bill. The sexes have the same plumage. Adults have a distinct light buffish white supercilium, dark gray-brown ear coverts with pale streaks, and a bright white malar area that flares to the rear. Their forehead is speckled, their crown dark gray-brown, and their upperparts dark brown. Their wing coverts are dark brown with wide buffish edges and their flight feathers dark fuscous with a narrow tawny-rufous band across them. Their tail's central feathers are dark brown and the rest blackish brown; the outer three pairs have progressively more pale tawny tips with the outermost of all having a tawny outer web. Their chin is white, their throat white with thin dark scallops, their breast dull pale brown with faint buff streaks, their belly whitish buff, their flanks dull brown, and their undertail coverts mottled brown and buff. Their iris is brown or dark brown, their bill dark brown to blackish whose mandible often has a paler base, and their legs and feet blackish to dark brownish. Juveniles are more richly colored than adults and have dark edges on most of their underparts' feathers.

The buff-winged cinclodes is found year-round in central and southern Chile and most of central and southern Argentina including Tierra del Fuego, and as a migrant to northern Argentina, southern Brazil, southeastern Paraguay, and Uruguay. It has also been recorded as a vagrant on the Falkland Islands. It inhabits a variety of open habitats, most of them grassy such as páramo, puna, and temperate grasslands. It also occurs in arid montane scrublands, on Patagonian steppes and beaches, and in open Patagonian woodlands. It usually is found near water, especially bogs and streams, and is commonly seen around human habitations. In elevation it occurs from sea level to 3,000 m (9,800 ft).

The buff-winged cinclodes feeds on a wide variety of invertebrates including many insects and some molluscs; it also feeds on seeds. It forages singly and in pairs while hopping and running on the ground. It probes and gleans from wet and dry ground, rocks, beach debris, grass, dung, and shallow water.