Stocky shorebird that thrives where waves break on rocky shorelines. Most often seen in winter, along the Pacific coast anywhere from southeast Alaska all the way to the southernmost tip of South America. Gray above with a white belly; dark spots in breeding plumage darken the breast. Bill is fairly thick and about as long as the head. Strong greenish-yellow legs and feet. In flight, note striking black-and-white wing pattern and bold white band at base of tail. In winter and migration, rarely found away from the spray of incoming waves. Heads inland to arctic rocky mountain ridges to breed. Often found in flocks with Black Turnstone, which is blacker above with an all-dark bill.