Large-billed woodcreeper of lowland rainforest. Warm brown with subtle fine black barring on the undersides. Large red bill is distinctive. The similar Amazonian Barred-Woodcreeper is barred and can also have a reddish bill in some parts of its range, but the barring on Bar-bellied is restricted to the belly, and the bill is heavier, and usually brighter red. Rare in most areas; it seems to prefer upland areas and tall stunted growth. Sometimes found around army ant swarms. Its song is a loud, resounding series of ascending squeals: “chu-WEE, chu-WEE, chu-WEE, …”.