Brown-billed Scythebill

The brown-billed scythebill (Campylorhamphus pusillus) is a species of bird in the subfamily Dendrocolaptinae of the ovenbird family Furnariidae. It is found in Colombia, Costa Rica, Ecuador, Panama, Peru, and Venezuela. == Taxonomy and systematics == The brown-billed scythebill has five subspecies: C. p. borealis Carriker, 1910 C. p. olivaceus Griscom, 1927 C. p. tachirensis Phelps, WH & Phelps, WH Jr, 1956 C. p. guapiensis Romero-Zambrano, 1980 C. p. pusillus (Sclater, PL, 1860) Subspecies C. p. borealis has sometimes been treated as a separate species. Some authors have suggested that subspecies C. p. tachirensis and C. p. guapiensis are not valid and should be merged into the nominate C. p. pusillus. == Description == The brown-billed scythebill is 20 to 25 cm (7.9 to 9.8 in) long and weighs 32 to 48 g (1.1 to 1.7 oz). It is a slim, medium-sized woodcreeper with a very long, slim, dramatically decurved bill. The sexes have the same plumage. Adults of the nominate subspecies have a face and neck streaked buff and blackish brown, with a faint buffy supercilium. Their crown and nape are dark brown, with thin deep buff streaks that extend sparsely onto the upper back. Their back and wing…