Bold black-and-white wing patches are distinctive in flight. Nonbreeding birds are overall white below with warm brown and orange tones on head and back. During the breeding season they are white with black or gray on the back. Breeds on tundra at northern latitudes; forms flocks in the winter and moves south, often joining up with other species of field birds. Listen for distinctive tittering rattle and “tew” calls as they fly overhead. Foraging flocks also gives harsher buzzy calls.