Description wikipedia

The dusky-tailed canastero (Pseudasthenes humicola) is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is endemic to Chile. The dusky-tailed canastero is 14 to 16 cm (5.5 to 6.3 in) long and weighs 18 to 24 g (0.63 to 0.85 oz). The sexes have the same plumage. Adults of the nominate subspecies have a narrow whitish supercilium on an otherwise dark gray-brown face with faint paler streaks. Their crown is dark brown, their back a slightly paler brown, and paler brown rump and uppertail coverts that have a rufescent tinge. Their wings are mostly the same brown as the back with dull rufous on the shoulder. Their tail's central feathers are also mostly the same brown as the back with dark fuscous tips; the rest of the feathers are fuscous blackish. Their throat is whitish with black flecks, their upper breast whitish with black streaks, their lower breast brownish gray with faint pale streaks, their belly paler unstreaked brownish gray, their flanks rufescent brown, and their undertail coverts darker rufous-brown. Their iris is dark brown, their maxilla dull black, their mandible bluish gray with a black tip, and their legs and feet greenish to gray. Juveniles have a more rufous rump than adults, with less streaking on the underparts more rufescent on the tail. Compared to the nominate, subspecies P. h. goodalli has more streaks on its face, a darker crown, less visible streaks on its breast, and brighter cinnamon on its shoulder, flanks, and undertail coverts. P. h. polysticta is very like the nominate but with duller brown flanks and undertail coverts and more spotting on the underparts.