Either of two small gulls (Rissa tridactyla or Rissa brevirostris) of the North Atlantic that nest in colonies on sea cliffs and spend the winter on the open ocean
or black-legged kittiwake White oceanic gull (Rissa tridactyla) with pearl-gray mantle, black-tipped wings, black feet, and yellow bill. Kittiwakes nest on narrow cliff ledges along the North and South Atlantic coasts. The red-legged kittiwake (R. brevirostris) is found in the Bering Sea region