About Heliobletus contaminatus Berlepsch, 1885
The sharp-billed treehunter, Heliobletus contaminatus Berlepsch, 1885, measures 12 to 13 cm (4.7 to 5.1 in) in length and weighs 13 to 15 g (0.46 to 0.53 oz). It has a short, pointed, slightly downturned bill, and males and females share identical plumage. Adults of the nominate subspecies have a wide golden-buff supercilium, a blackish brown band behind the eye, dark brownish and ochraceous lores, and dull buff ear coverts. Their crown is blackish brown with wide golden-olive streaks, and they have a partial buff collar. Their back, rump, and uppertail coverts are dull olive-brown, with rufous tips on the uppertail coverts. Their tail is dark rufous, and the very tips of the tail feathers lack barbs. Their wings are olive-brown with darker primary coverts. Their throat is pale yellowish buff, their breast is a paler yellowish buff marked with dull olive-brown streaks, their belly is plain dull olive-brown, and their undertail coverts are dull brownish marked with very wide rufous streaks. Their iris is dark brown, their maxilla is brown to black, their mandible is pinkish gray, and their legs and feet are greenish gray to dull yellow-green. Juveniles closely resemble adults, but have a more ochraceous supercilium and more ochraceous streaks, and their streaks are less distinct. The subspecies H. c. camargoi has wide pale golden-buff streaks on its back, and more, wider streaks on its breast and belly. Regarding distribution and habitat, the nominate subspecies occurs in southeastern Brazil, ranging south from Minas Gerais and Espírito Santo to São Paulo and Rio de Janeiro states. H. c. camargoi occurs from São Paulo south through Rio Grande do Sul and eastern Paraguay, into northeastern Argentina's Misiones Province and extreme northeastern Uruguay. The species inhabits humid lowland and montane evergreen forest. It occurs at elevations ranging from sea level to 1,830 m (6,000 ft), and the nominate subspecies tends to be more numerous at higher elevations within this range.
