Cape Verde Swamp Warbler Acrocephalus brevipennis

Medium-sized warbler with a long bill, short wings, and a long tail, endemic to the Cape Verde Islands. Rather grayish above with a gray-brown wash below. Breeds primarily in reedbeds, but has also adapted to sugar and coffee plantations. Song is a unique, bubbly series of warbles comparable to a bulbul or nightingale. Calls are a rather soft, "chak" and "chrrr."