Chapman's Antshrike

Chapman's antshrike is 14 to 15.5 cm (5.5 to 6.1 in) long and weighs about 22 g (0.78 oz). Members of genus Thamnophilus are largish members of the antbird family; all have stout bills with a hook like those of true shrikes. This species exhibits marked sexual dimorphism though both sexes have a bushy crest. Adult males of the nominate subspecies T. d. zarumae have a black and white streaked forehead and a black crown and crest. Their face and the sides of their neck are streaked with black and white. They have a medium gray "collar". Voice: The song of Chapman's antshrike is "an accelerating series of 12-14 nasal notes, followed by three higher pitched, broad amplitude notes and then ending in a short rattle or trill". Schulenberg et al. write it as "pew pew-pew-pwe'pu'puPEWpee pew-trr'eh". Its calls include "a nasal 'nah' ", "a high, descending, mewing whistle: peew", and "an abrupt chup".