Rufous-backed Antvireo Dysithamnus xanthopterus

Big headed antbird with a heavy hooked bill and a shortish tail. Rufous above and pale below with a gray neck and face dappled with white spots. Males have a dark gray cap, rufous in females. The song is a loud and fast descending series of trembling notes. Found in the upper to middle levels of humid forests, usually with mixed-species flocks.