Chestnut-rumped Woodcreeper

The chestnut-rumped woodcreeper is a medium-sized member of its genus, with a longish, slim, slightly decurved bill. The species is 20 to 23.5 cm (7.9 to 9.3 in) long; males weigh 32 to 49 g (1.1 to 1.7 oz) and females 27 to 46 g (0.95 to 1.6 oz). The sexes have the same plumage. Adults of the nominate subspecies have a face that is mostly thin deep buff and brown streaks, with a buff supercilium and eyering. Their crown and nape are blackish brown with deep buff spots on the crown, and the spots become streaks on the nape. Voice: The chestnut-rumped woodcreeper sings mostly at dawn and dusk. Its song has been put into words as "chip!, chip, chip, chi-i-i-i-i-i-i-ip" and "zut, zut, zut-zut-zut-t't't't't,e'e e". Its calls are an "unstructured series of chirps", such as "ik" and "chip".