Uniform Antshrike

The uniform antshrike is 14.5 to 17 cm (5.7 to 6.7 in) long and weighs about 24 g (0.85 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 significant sexual dimorphism. Adult males of the nominate subspecies are mostly deep gray or blackish gray. They sometimes have white tips on their outer tail feathers. Adult females have a rufous crown and a gray face. Their upperparts are rufous brown and their underparts pale rufous brown. Immatures of both sexes are similar to adult females. Voice: The uniform antshrike's song has been described as "a simple short series of nasal notes, each note sometimes with rising inflection, 'anh, anh, anh, anh' (sometimes 3 or 5 notes)" and as "a slightly accelerating and rising, slow series of 4–8 high, descending notes NYAH NYAH-nyah-nyah". The song of subspecies T. u. caudatus is similar to that of the other two but higher pitched.