Canyon canastero

The canyon canastero is 15 to 17 cm (5.9 to 6.7 in) long and weighs 13 to 17 g (0.46 to 0.60 oz). The sexes have the same plumage. Adults of the nominate subspecies have a thin buff supercilium and dark brownish lores on an otherwise gray-brown face. Their crown is warm dark brown and their back and rump a slightly paler brown. Their wings are dull reddish brown. Their uppertail coverts are chestnut-rufous and their tail a more rufous brown than the back. Their chin and upper throat are pale tawny-orange, their lower throat and upper breast light gray-brown with faint paler streaks, their lower breast and belly unstreaked pale gray-brown, and their flanks and undertail coverts dull rufescent brown. Their iris is brown, their maxilla black to dark horn, their mandible gray to pinkish horn with a blackish tip, and their legs and feet gray to blackish. Juveniles' chin and throat are light gray-brown, their breast has faint dark bars, and their underparts have a brownish wash. Subspecies A. p. neglecta has a darker back than the nominate, a more chestnut chin and throat, and darker and browner underparts. A. p. grisior is paler than the nominate with slightly grayer underparts and slightly less rufescent flanks.