Chestnut-winged hookbill
The chestnut-winged hookbill is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Bolivia, Brazil, Colombia, Ecuador, and Peru.
Taxonomy and systematics
The chestnut-winged hookbill is the only member of its genus. Beyond that its taxonomy is unsettled. The International Ornithological Committee and BirdLife International's Handbook of the Birds of the World treat it as monotypic. The Clements taxonomy assigns it two subspecies, the nominate A. s. strigilatus and A. s. cognitus.Within the ovenbird family, the chestnut-winged hookbill is most closely related to the foliage-gleaners of genus Dendroma.
This article follows the monotypic model.
Description
The chestnut-winged hookbill is long and weighs. 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. Their rump and uppertail coverts are an even lighter brown with fainter streaks. Their wing coverts are dull chestnut with pale shafts; the flight feathers have dull chestnut outer webs and dark fuscous inner webs and tips. Their tail is bright rufous. Their throat is pale yellowish buff with faint dull brownish flecks, their breast dull yellowish buff with blurry browish streaks, their belly like the breast but only faintly streaked, their flanks dull brownish with yellowish buff streaks, and their undertail coverts mottled dull buff and light browish. Their iris is brown, their maxilla blackish to dark horn, their mandible blue-gray to bluish ivory, and their legs and feet yellowish brown to pale brownish olive. Juveniles have less regular streaks on their upperparts and darker and narrower streaks on their underparts than adults.Distribution and habitat
The chestnut-winged hookbill is found in the Amazon Basin from southeastern Colombia south through eastern Ecuador and eastern Peru into northern Bolivia and east in Brazil to the Rio Tapajós. In Brazil it mostly occurs south of the Amazon but has been recorded north of it inJaú National Park. It inhabits tropical lowland evergreen forest. It strongly favors terra firme forest but does occur locally in várzea. In elevation it mostly occurs below but can be found locally up to.