Guianan streaked antwren

The Guianan streaked antwren (Myrmotherula surinamensis) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Brazil, Colombia, French Guiana, Guyana, Suriname, and Venezuela.

The Guianan streaked antwren is 9 to 10.5 cm (3.5 to 4.1 in) long and weighs 7.5 to 9 g (0.26 to 0.32 oz). It is a smallish bird with a tiny tail. Adult males have a black and white streaked face. Their crown, back, and rump are black with thin white streaks. They have a large white patch between the shoulders. Their tail is black with white edges and tips to the feathers. Their wings are black with white tips on the coverts and white edges on the flight feathers. Their throat, breast, and belly are white and their flanks and crissum gray. Black streaks extend from the throat to the flanks and belly. Adult females have an orange-buff face and cinnamon-rufous crown and nape with black streaks. Their belly and crissum have a buff tinge; their underparts are mostly plain but may have fine streaks on the breast and sides.