Large, unusual brown warbler with a black tail, pale eye, and black “moustache” mark. Found in patches of tall, thick grass within savanna and scrub habitats. Generally skulking, and most often seen when it sits up to sing. The song is a chatty, warbling jumble with a distinctive fast cadence. Similar in overall shape and habitat to Fan-tailed Grassbird, but much larger, with a pale eye and black facial streak.