Olive-backed foliage-gleaner
The olive-backed foliage-gleaner is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in every mainland South American country except Argentina, Chile, Paraguay, and Uruguay.
Taxonomy and systematics
The olive-backed foliage-gleaner has these four subspecies:- A. i. infuscatus
- A. i. badius Zimmer, JT, 1935
- A. i. cervicalis
- A. i. purusianus Todd, 1948
The olive-backed foliage-gleaner, Para foliage-gleaner, Pernambuco foliage-gleaner, and white-eyed foliage-gleaner form a superspecies.
Description
The olive-backed foliage-gleaner is long and weighs about. It is a fairly large member of its genus and has a heavy bill. The sexes have the same plumage. Adults of the nominate subspecies A. i. infuscatus have a mostly blackish brown face with faint reddish streaks on the ear coverts and grizzled blackish brown and buff lores. Their forehead is blackish brown with wide but inconspicuous rufescent brown streaks that become faint on the dark brown crown. They have a vague dark brown collar with faint light brown streaks. Their back and rump are rich dark olivaceous-brown that blends to dark reddish brown uppertail coverts. Their wing coverts are rich dark brown and their flight feathers slightly paler with a rufescent tinge. Their tail is dark reddish chestnut. Their throat and the sides of their neck are white, their center breast white with a gray wash that becomes buffy before their light buff-brownish belly. The sides of their breast are dark olive-brown, their flanks rufescent brown, and their undertail coverts pale brown. Their iris is dark brown, light brown, or hazel; their maxilla black to dark olive-horn; their mandible olive horn to gray to pale brown; and their legs and feet grayish green to yellowish olive. Juveniles are slightly darker and duller than adults.Subspecies A. i. purusianus has more rufescent upperparts than the nominate. A. i. cervicalis has a more rufescent crown and hindneck than the nominate, with slightly more brownish flanks. A. i. badius has the reddest brown back and grayest lower breast and belly of all the subspecies.
Distribution and habitat
The olive-backed foliage-gleaner is a bird of the Amazon Basin. Its subspecies are found thus:- A. i. infuscatus: southeastern Colombia from Meta and Guainía departments south through eastern Ecuador and eastern Peru into northern Bolivia just into La Paz Department
- A. i. badius: eastern Colombia's Vichada Department, southern Venezuela, and northwestern Brazil north of the Amazon to the Rio Negro
- A. i. cervicalis: from Bolívar state in Venezuela east through the Guianas and northern Brazil north of the Amazon between the Rio Negro and Amapá state
- A. i. purusianus: western Brazil south of the Amazon east to the Rio Madeira