Glossy Antshrike

The glossy antshrike is about 17 cm (6.7 in) long and weighs 27 to 33 g (0.95 to 1.2 oz). This species exhibits minor sexual dimorphism, and both sexes have a shaggy crest. Adult males are almost entirely black. Their lower back, rump, lower belly, and crissum are dark gray. Some white is mostly concealed under their scapulars and the tips of their tail feathers are white. The amount of white varies somewhat across the species' range. Adult females are almost like males but with a deep chestnut-brown forehead and crest. Voice: The glossy antshrike's song is a "short, accelerating series of 10-15 high, nasal 'ah' notes". It also makes "a slowly repeated series of downslurred whistles", "soft and raspy 'caw' notes". a "long downslurred whistle", and a "shorter downslurred whistle that immediately becomes a short rattle".