Tiny resident of tall rainforest. Wary and can be difficult to see well; note distinctive sputtering alarm call, tiny size, plain face, and large white (male) or buffy (female) wing spots. Generally found in pairs near treefall gaps and other places with dense understory; does not follow mixed-species flocks. Forages in low vegetation, rarely venturing more than a meter or two above the ground. Song of male is somewhat similar to Common Scale-backed Antbird, but has thinner quality and does not rise in pitch.