Bicolored Antbird

The bicolored antbird is 13.5 to 15 cm (5.3 to 5.9 in) long and weighs 28 to 37 g (0.99 to 1.3 oz). The sexes are the same. Adults of the nominate subspecies G. b. bicolor have a brownish chestnut crown and nape. They have bare blue-gray skin around the eye, a gray forehead, a broad gray band behind the eye, and black cheeks. Their back, rump, wings, and tail are brownish chestnut. Their throat and breast are white with a brown band from their cheek along their flanks. Subspecies G. b. Voice: The bicolored antbird's primary song is "a series of high notes which increase in pitch and pace, then slow down and descend". Its calls are essentially the same as those of the white-cheeked antbird and include a "harsh, vibrant 'chirr'...diminishing slightly in pitch and intensity, and abrupt 'chup' notes, usually doubled but also in groups of 3–4".