Curve-billed Scythebill

The curve-billed scythebill is 22.5 to 25 cm (8.9 to 9.8 in) long and weighs 30 to 38 g (1.1 to 1.3 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 C. p. procurvoides have a dark brown head and neck with thin whitish to buffy streaks on them and the face. Their back and wing coverts are olive-brown to reddish brown. Their flight feathers, rump, and tail ares rufous-chestnut that contrasts with the back. Their throat is buffy-white with a fine scaly appearance. Voice: The curve-billed scythebill sings mostly at dawn and only in short bursts. The subspecies' songs differ. That of the nominate is "an accelerating series...of 7–9 somewhat melancholy whistles on even pitch or falling slightly...'weeee, weé, wee, we, we, wew' or 'kuweee, kuwee, kwee, wee-wee-we-we-we. ". That of C. p.