Large brown-and-white swallow with a band across the chest and a pale mark above the eye. In flight, shows broad wings with large white patches below. Found mainly in grassland and wetland, though ranges widely over other open habitats. Often in flocks, sometimes mixed with other swallow and swift species. Song is a fast, twanging jumble. Similar to Bank Swallow, but much larger, with white patches under the wing and with a square tail.