Natterer's slaty antshrike

Natterer's slaty antshrike (Thamnophilus stictocephalus) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Bolivia and Brazil.

Natterer's slaty antshrike is 14 to 15 cm (5.5 to 5.9 in) long and weighs 19 to 22 g (0.67 to 0.78 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 have a black forehead with gray spots and a black crown. Their back is mixed black and gray with a hidden white patch between their scapulars. Their face is gray. Their wings and wing coverts are black with white spots and edges. Their tail is black with white tips on the feathers. Their underparts are gray with a whitish belly. Adult females have a rufous crown and reddish yellow-brown upperparts with dark brown scapulars. Their wings are dark brown with white spots on the coverts and clay colored edges on the flight feathers. Their tail is dark brown with white tips on the feathers. Their underparts are a mix of light clay and light gray that is paler on the throat and belly. Males of subspecies T. s. parkeri have a gray forehead, a gray back with a few black spots, and paler underparts than the nominate; their belly center is white. Females have less reddish upperparts than the nominate.