Black-capped Antwren is an inhabitant of gallery forest and deciduous forest from Eastern Brazil to Bolivia and Paraguay. Black-capped Antwren has gray upperparts with a black crown and nape, long white supercilium, a long blackish postocular streak, black wings and gray underparts. These antwrens are usually encountered in pairs and family groups traveling with mixed species flocks, 7 to 20m above the forest floor. Black-capped Antwrens are methodical feeders. As they forage, Black- capped antwrens constantly flick their wings progressing through short hops and stopping every couple of seconds to scan for prey. When prey is sighted these antwrens make short lunging stabs or quick diagonal sallies to snatch the insect or spider from a branch or leaf.