The great black-backed gull (Larus marinus) is the largest gull species. This aggressive hunter and scavenger breeds along the coasts and islands of the North Atlantic, primarily in northern Europe and northeastern North America. Southern populations are mostly sedentary, while those from the far north, such as northern Norway and northwest Russia, migrate south in winter and may also move to large inland lakes. Adults feature a white head, neck, and underparts, dark grey wings and back, pink legs, and a yellow bill with a red spot.
