The River Warbler is a small bird with fine streaks on its breast and flanks. It stays hidden in waterside vegetation and searches for insects and other small invertebrates.
Its upperparts are olive-brown, with dark streaks running down the breast and flanks.
During the breeding season it stays among dense waterside grasses and low shrubs, feeding on insects and other small invertebrates while remaining difficult to see.
An extinction-risk assessment has not been added yet.