Chunky, chestnut-colored bird found only near large rivers in the western part of the Amazon basin. Plumage is chestnut-brown with pale eyebrow, throat, and belly. Separated from Pale-legged Hornero by darker breast, face, and crown; from Lesser Hornero by larger size, darker breast, and pale (not dark) legs. Inhabits understory of densely wooded and seasonally flooded forest along rivers and on river islands. Song is a descending whinny.