Olive-backed Foliage-gleaner

The olive-backed foliage-gleaner (Automolus infuscatus) 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 (Sclater, PL, 1856) A. i. badius Zimmer, JT, 1935 A. i. cervicalis (Sclater, PL, 1889) A. i. purusianus Todd, 1948 What is now the Para foliage-gleaner (A. paraensis) was a fifth subspecies. Following a 2002 publication, major taxonomic systems elevated it to species rank. The olive-backed foliage-gleaner, Para foliage-gleaner, Pernambuco foliage-gleaner (A. lammi), and white-eyed foliage-gleaner (A. leucophthalmus) form a superspecies. == Description == The olive-backed foliage-gleaner is 18 to 19 cm (7.1 to 7.5 in) long and weighs about 27 to 40 g (0.95 to 1.4 oz). 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…