Description wikipedia

The bamboo antshrike (Cymbilaimus sanctaemariae) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Bolivia, Brazil, and Peru. == Taxonomy and systematics == Until the 1980s what is now the bamboo antshrike was treated as a subspecies of the fasciated antshrike (C. lineatus). The two are the only species in genus Cymbilaimus. The bamboo antshrike is monotypic. == Description == The bamboo antshrike is 16 to 17 cm (6.3 to 6.7 in) long and weighs 28 to 33 g (0.99 to 1.2 oz). This species exhibits significant sexual dimorphism. Both sexes have a small crest, a dark brown iris, and a somewhat heavy bill with a hook at the end like true shrikes. Adult males have a black forehead and crown; the rest of their plumage is thin black and white bars. Females have a rufous crown with black tips on the crest feathers. Their upperparts and tail have thin dark brown and pale yellowish brown bars, their throat is plain buffy white, and the rest of their underparts are mostly plain cinnamon-buff with darker barring on the sides and flanks.