Nondescript, long-tailed, long-billed warbler of wetlands. Varies geographically, with the back being olive-brown to rusty-brown, and the underparts pure white to pale brown. Found in reedbed wetland habitat, including papyrus. Far less secretive than many marsh-dwelling warblers; often hops about in the open. Frequently sings a variable, complex mix of raspy and musical notes that usually ends in a trill. Smaller than Greater Swamp Warbler, larger than African Reed Warbler, and shorter-winged than Great Reed Warbler.