Olive-backed Woodcreeper

The olive-backed woodcreeper is 19.5 to 25 cm (7.7 to 9.8 in) long, males weigh 40 to 52 g (1.4 to 1.8 oz) and females 32 to 48 g (1.1 to 1.7 oz). It is a medium-sized member of genus Xiphorhynchus, with a slightly decurved bill. The sexes have the same plumage. Adults of the nominate subspecies X. t. triangularis have a finely streaked face with a buffy supercilium and eyering. Their crown and nape are blackish brown with pale buff elongated spots. Their back, wing coverts, and rump are bright olive to brownish olive. Their upper back has scattered buff streaks. Voice: The olive-backed woodcreeper appears to be less vocal than many others of its genus. Its song is "a series of hard notes that accelerates then slows, 'we we we-we-we-we-we-WE-WE-We-we-wa' ". It also has a fainter song, "a weak and somewhat nasal series that accelerates into a slow trill, 'quee, quee QUEE-que-que'e'e'e'e'.