Buff-browed Foliage-gleaner

The buff-browed foliage-gleaner is 17 to 18 cm (6.7 to 7.1 in) long and weighs 22 to 33 g (0.78 to 1.2 oz). It is a medium-sized furnariid with a thick, slightly upcurved, bill. The sexes have the same plumage. Adults of the nominate subspecies S. r. rufosuperciliata have a tawny-buff eye ring and a lighter supercilium that extends to the nape; the rest of their face is brownish with small buff markings. Their crown is dull olive-brown with vague whitish streaks at the rear, and their back, rump, and uppertail coverts are plain olive-brown. Their tail is dull rufous and their wings are rich olivaceous brown. Their throat is whitish with some brownish feather tips, their breast buffy whitish with olive-brown feather edges that give a scalloped appearance, their belly olive-brownish with wide blurry buffy-whitish streaks that disappear towards the rear, their flanks a darker olive-brownish with fewer streaks, and their undertail coverts olive-brownish with ochraceous-tinged streaks. Their iris is brown to dark brown, their maxilla brown to black, their mandible whitish to blue-gray, and their legs and feet olive to brownish gray. Juveniles are similar to adults but have spotted rather than streaked underparts. Subspecies S. r. …

The buff-browed foliage-gleaner has a disjunct distribution, with two widely separated ranges. The subspecies are found thus:

S. r. cabanisi: from extreme southern Ecuador's Cordillera del Cóndor south on the east slope of the Andes through Peru into Bolivia S. r. oleaginea: Andes from central Bolivia south into northwestern Argentina as far as La Rioja Province S. r. rufosuperciliata: southeastern Brazil from Minas Gerais and Espírito Santo south to Paraná S. r. acrita: north-central Paraguay, far southeastern Brazil's Santa Catarina and Rio Grande do Sul states, Uruguay, and northeastern Argentina south to Buenos Aires Province The Andean populations of the buff-browed foliage-gleaner inhabit montane evergreen forest and mature secondary forest, often with Chusquea bamboo, at elevations ranging between 1,300 and 2,500 m (4,300 and 8,200 ft), but in Bolivia, it occurs locally down to 1,000 m (3,300 ft). The southeastern populations inhabit lowland tropical evergreen forest, gallery forest, and secondary forest at elevations up to 2,000 m (6,600 ft).

The buff-browed foliage-gleaner feeds on arthropods. It forages singly and in pairs, sometimes as part of mixed-species feeding flocks, and usually in the forest's undergrowth but sometimes on the ground or up to the subcanopy. It gleans its prey from dead leaves, debris, epiphytes, and branches.