Global Range: (>2,500,000 square km (greater than 1,000,000 square miles)) Discontinuously circumpolar, breeding in the north Atlantic, north Pacific, and Arctic oceans. In North America breeds in colonies along the coasts of Alaska, the Canadian Arctic, and in Greenland (Godfrey 1966). Highly pelagic. Two large colonies in the Bering Sea include light-plumaged birds almost exclusively, whereas dark-plumaged birds dominate colonies in the Gulf of Alaska and Aleutian Islands.
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