Distinctive rounded-tailed rufous-brown bird of riverine habitats. Narrow buffy eyebrow and buffy streaks on cheeks and breast. Upperparts rufous-brown and underparts olive-brown; rich chestnut in chin, wings, rump, and tail. Rare, usually in pairs, found from understory to mid-level in riverine forest in very restricted range. Voice consists of repeated “CHEUP” notes, mostly in duet. Similar to Delta Amacuro Softtail (no range overlap), which is more streaked (including the head) and lacks buff eyebrow; Speckled Spinetail has a buffy (not orange) chin, paler head and breast with dark speckling, and a rufoud cap. Endemic to the Orinoco River and nearby tributaries in southwestern Venezuela and eastern Colombia.