Nondescript, long-tailed, long-billed warbler of wetlands. Varies geographically: the back can be dark brown to rusty-brown, and the underparts can have heavy distinct streaking or a bit of blurry streaking. Found in reedbed wetland habitat, including papyrus. Extremely secretive and skulking. Most often seen when it sits up to sing or gives a short display flight. Song starts with slow and hesitant wooden notes that speed up, then ends with a trill made by beating the wings together at incredible speed. The variably streaked breast separates it from reed-warblers and swamp-warblers.