Global Range: (>2,500,000 square km (greater than 1,000,000 square miles)) BREEDING: Holarctic. In North America, from tundra of Alaska, Canada, western Greenland, to western and central U.S.; also in Old World. NON-BREEDING: in Western Hemisphere, from eastern and southeastern (coastal) U.S., Great Lakes, southeastern Alaska southwestern British Columbia, western and southwestern U.S. south to northern Colombia and Venezuela, rarely to Surinam, including Puerto Rico, Virgin Islands, Hawaii; and Old World. In the U.S. the highest winter densities occur in northern Utah (Bear River refuge) and western Texas (Muleshoe refuge) (Root 1988).
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