Black-billed Scythebill

The black-billed scythebill (Campylorhamphus falcularius) is a species of bird in the subfamily Dendrocolaptinae of the ovenbird family Furnariidae. It is native to the Atlantic Forest. == Taxonomy and systematics == The black-billed scythebill and red-billed scythebill (C. trochilirostris) have at times been considered conspecific and also as sister species, but genetic data indicate neither is true. The black-billed scythebill is monotypic. == Description == The black-billed scythebill is 24 to 28 cm (9.4 to 11 in) long and weighs 37 to 42 g (1.3 to 1.5 oz). It is a slim, medium-sized woodcreeper with a very long, slim, dramatically decurved bill. The sexes have the same plumage. Adults have a thinly streaked face of buff and blackish with a narrow buffy-white supercilium. Their neck has the same colored streaks but they are coarser. Their crown and nape are blackish, with thin whitish to ochre streaks that extend onto the upper back. Their back, wing coverts, and rump are brownish to olive-brown. Their wings, uppertail coverts, and tail are rufous-chestnut; the tips of the primaries are blackish brown and the tail feathers have blackish shafts. Their throat is whitish with dark olive-brown streaks. Their underparts are pale brown to olive-brown…