_Breeding range._--North to northeastern Siberia (Taimyr Peninsula, Nijni Kolymsk, Cape Wankarem, and East Cape); Alaska (Cape Prince of Wales, Point Barrow, Colville Delta, and Camden Bay); Mackenzie (Cape Bathurst, Mackenzie Bay, Franklin Bay, and Baillie Island); and Franklin (Port Kennedy). East to Franklin (Port Kennedy and Felix Harbor); and probably eastern Keewatin (Cape Fullerton). South to probably eastern Keewatin (Cape Fullerton); northwestern Mackenzie (Great Slave Lake and Peel River); and Alaska (probably Nushagak and Ugashik). West to Alaska (Ugashik, Pastolik, Hooper Bay, and St. Michael); and northeastern Siberia (Cape Serdze, Plover Bay, and Taimyr Peninsula). The species also has been recorded as breeding in Greenland, and on the coast of Labrador (Okak), but the records are indefinite or otherwise unsatisfactory. _Winter range._--North to Washington (Dungeness Spit); Texas (Refugio County); Louisiana (Freshwater Bayou and New Orleans); and southern New Jersey (Anglesea). East to southern New Jersey (Anglesea, and Five-mile Beach); Virginia (Wallops, Cobbs, Sandy, and Hog Islands); North Carolina (Pea Island and Fort Macon); South Carolina (Port Royal and Frogmore); Georgia (Savannah and Darien); and Florida (Amelia Island, Tarpon Springs, and Fort Myers). South to Florida (Fort Myers); Texas (probably Brownsville); and Lower California (La Paz). West to Lower California (La Paz); California (San Diego, Alamitas Bay, Los Banos, San Francisco Bay, and Humboldt Bay); Oregon (Yaquina Bay); and Washington (Nisqually Flats, Tacoma, and Dungeness Spit). It also has been noted in winter north to the mouth of the Fraser River, British Columbia (specimen in U. S. National Museum); Barnstable, Massachusetts (Howe, December 23, 1903); Long Island, New York (Fleischer, December 25, 1914); and south to Great Inagua, Bahama Islands (Worthington, February 3, 1909).