Large plain brown woodcreeper of Amazonian lowlands. Reddish brown overall with olive brown underparts, a heavy gray bill, and fine white breast streaking on some individuals. Typically found in young forest and forest edge, often around rivers and lakes. Most other woodcreepers have much more prominent streaking. Compared to similar Plain-brown and White-chinned Woodcreepers, this species has a more even brown face without noticeable facial markings and a heavier, lighter gray bill. Listen for its song, an explosive, decelerating rattle punctuated with a low churr at the end.