Straight-billed Earthcreeper

The straight-billed earthcreeper (Ochetorhynchus ruficaudus) is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Argentina, Bolivia, Chile, and Peru. == Taxonomy and systematics == The straight-billed earthcreeper has these three subspecies: O. r. montanus (d'Orbigny & Lafresnaye, 1838) O. r. famatinae (Nores, 1986) O. r. ruficaudus Meyen, 1834 For a time the straight-billed earthcreeper was placed in genus Upucerthia but since the early 2000s has been in its present genus. == Description == The straight-billed earthcreeper 16 to 19 cm (6.3 to 7.5 in) long and weighs 28 to 41 g (0.99 to 1.4 oz). It is a medium-sized earthcreeper whose bill is long and only very slightly decurved. The sexes are alike. Adults of the nominate subspecies O. r. ruficaudus have a dull brownish face with some paler inclusions, a narrow whitish supercilium, a black stripe through the eye, and whitish cheeks. In the north of their range their crown is brown with slight darker mottling, their back and rump rufescent brown, and their uppertail coverts dark rufescent. In the south their upperparts are darker and less reddish. Their tail's central pair of feathers have a rufous base that blends…