Black-throated Antshrike

The black-throated antshrike is a large dark antbird, 19 to 22 cm (7.5 to 8.7 in) long and weighing 65 to 75 g (2.3 to 2.6 oz). The species exhibits significant sexual dimorphism, though both sexes have a crest (that usually is flattened), red irises, and a heavy black bill with a hook at the end like true shrikes. Adult males are mostly slate gray with a black head, throat, and breast, a usually hidden small white patch between their scapulars, and faint white bars on their tail. Adult females have a rufous crest, nape, upperparts, and wings. Voice: The black-throated antshrike's song is a "slow series of 10-15 first rising, then leveling out, fluted 'tuh' notes" that span six to seven seconds. It has also been described as "a slow, almost hypnotic of clear, insistent whistles, peeeur, peeeur, peeur... at a steady pace". Its call is "a long (e.g. 1 second), nasal, downward-inflected churr".