Chestnut-winged Hookbill

The chestnut-winged hookbill is 17 to 19 cm (6.7 to 7.5 in) long and weighs 30 to 39 g (1.1 to 1.4 oz). It is a largish furnariid with distinctive plumage, and a moderately hooked bill resembling those of Thamnophilus antshrikes. The sexes have the same plumage. Adults have a wide whitish to buff supercilium, grizzled brownish and buff lores, brown ear coverts with pale streaks, and yellowish buff malars. Their crown is very dark brown with obvious narrow gold-buff streaks. Their back is a paler, somewhat grayish olive, brown, with paler and less well defined streaks. Voice: The chestnut-winged hookbill's song is "a fast, ascending trill that increases in loudness as it levels off in pitch, then ends abruptly" and can last for 30 seconds or more. It has also been described as a "sustained gently undulating, slightly angry-sounding rattle". Its calls include "a harsh, buzzing 'bzzt' " and "teejuw". It also makes a short ascending trill.