About Hylophilus poicilotis Temminck, 1822
The rufous-crowned greenlet (scientific name Hylophilus poicilotis Temminck, 1822) is approximately 12.5 cm (4.9 in) long and weighs 9 to 12 g (0.32 to 0.42 oz). Males and females have identical plumage. Adult individuals have a bright chestnut-brown forehead and crown, with mottled grayish black ear coverts. Their nape, upper back, and shoulders are olive-green, while their lower back and rump are a brighter shade of green. Their wings are dull grayish black: the outer webs of the primaries and secondaries have thin greenish edges, and the inner webs of the tertials have yellow-green edges. Their tail is grayish green, with brighter greenish edges along the outer webs of the feathers. Their throat is dull pale gray, their upper breast is yellowish gray, their lower breast is dull yellow, their flanks and belly are a brighter yellow, and their vent is dull yellowish. They have dark reddish brown irises, a dull blackish maxilla, a gray to dusky pink mandible, and grayish legs and feet. Immature birds are similar to adults, but have a more olivaceous back and brighter underparts. The rufous-crowned greenlet is distributed in southeastern Brazil, from southern Mato Grosso do Sul south into Rio Grande do Sul, across eastern Paraguay, and into Misiones Province in northeastern Argentina. The South American Classification Committee has received unconfirmed reports of this species from Bolivia. It lives in moist to humid forest, woodlands, scrublands, and mature secondary forest, and can be found at elevations ranging from sea level up to 1,800 m (5,900 ft).
