Breeding range.—North to Alaska (Shumagin Islands, Bethel, St. Michael, Nome, Kowak River, Cape Smith, and Fort Yukon); Mackenzie (La Pierre House, Fort Anderson, Dease River, and Fort Smith); northeastern Manitoba (Fort Churchill); northern Ontario (Cape Henrietta Maria); Ungava (Fort George and Great Whale River); Labrador (Nain); and Newfoundland (Halls Bay, Grand Lake, and St. Johns). East to Labrador (Nain); Newfoundland (St. Johns); eastern Quebec (Magdalen Islands); Nova Scotia (Baddeck and Halifax); Maine (Calais and Waldo County); Massachusetts (Salem and Brookline); Connecticut (Portland); New York (Croton Falls); New Jersey (Newfoundland, Norristown, Trenton); and southeastern Pennsylvania (Mill Grove). South to southeastern Pennsylvania (Mill Grove); northwestern Pennsylvania (Meadville); northern Ohio (Fremont); northern Indiana (Miami, English Lake, and Cedar Lake); northern Illinois (Hinsdale and Winnebago); Iowa (Sabula, Grinnell, and Boone); Colorado (Estes Park, Barr, San Luis Lake, and Silverton); Utah (Parleys Park and Fairfield); southwestern Idaho (Nampa); and northern California (Sierra Valley and Shasta Valley). West to northern California (Shasta Valley); Oregon (Fort Klamath, Corvallis, and Salem); Washington (Yakima and Olympia); British Columbia (Chilliwack, Vancouver, and Metlakatla); and Alaska (Sitka, Kodiak, Nushagak, and Shumagin Islands).
Wilson's snipe also have been detected in summer north to Chimo, Ungava, Hopedale, Labrador, and Sandwich Bay, Quebec, and have been found lingering (probably non-breeders) south to Chloride, New Mexico, and Corpus Christi and San Angelo, Texas, while there is one breeding record for northern Los Angeles County, California (Mailliard, 1914).
Winter range.—The Wilson snipe winters regularly north to Washington (Tacoma); British Columbia (Chilliwack and Okanagan Landing); Wyoming (Yellowstone Park); Colorado (El Paso County); southern Arizona (Tucson and Fort Huachuca); southern New Mexico (Rio Mimbres); Texas (Austin, Kerrville, and Bonham); Oklahoma (Caddo); Arkansas (Fayetteville and Stuttgart); Alabama (Coosada and Montgomery County); central North Carolina (Raleigh); and southeastern Virginia (Virginia Beach); eastern North Carolina (Pea Islands); Bermuda; South Carolina (Charleston); Georgia (Savannah and Blackbeard Island); Florida (Canaveral, Orlando, Kissimmee, and Royal Palm Hammock); Bahama Islands (New Providence, Watling Islands, and Great Inagua); Porto Rico (Guanica Lagoon); and the Lesser Antilles (Antigua, St. Vincent, Barbados, Grenada, and Trinidad). South to the Lesser Antilles (Trinidad); northern Venezuela (Caracas); Brazil (Rio de Janeiro); Colombia (Medellin and Puerto Berrio); and Panama (Frijole and Chitra). West to Panama (Chitra and the Canal Zone); Costa Rica (San Jose); Nicaragua (Greytown and the Escondido River); Honduras (Comayagua and Manatee Lagoon); Guatemala (Duenas and Atitlan); Mexico (Guanajuato, Escuinapa, Mazatlan, San Jose del Cabo, and Colonia Diaz); California (Salton Sea, Santa Barbara, San Francisco, and Eureka); and Washington (Tacoma).
It also has been known to winter (where warm springs or other factors assure open water) north to Nevada (Paradise), Utah (Provo), Montana (Terry, Helena, and near Bozeman), Wyoming (Como and Cody), Colorado (Fountain Creek, Sweetwater Lake, Clear Creek near Denver, and near Julesburg), Nebraska (Holt, Sioux, Dawes, and Cherry Counties, and along the Missouri River), North Dakota (Fort Yates), Iowa (Hancock County), Wisconsin (Milwaukee), Michigan (Grand Rapids), southern Ontario (Barrie), Ohio (Granville), New York (Oneida, Onondaga Lake, Poughkeepsie, Ithaca, New York City, and Long Island), Connecticut (Portland and New Haven), Massachusetts (Jamaica Plain, near Boston, Peabody, Hancock, and Cape Cod), and Nova Scotia (Wolfville). It has been detected in Alaska at Wrangell, on November 11, 1920, and at Craig, on December 7, 1919.
Spring migration.—Early dates of arrival in the spring are: District of Columbia, Washington, February 17; Pennsylvania, Philadelphia, March 7, Harrisburg, March 11, Carlisle, March 18, Berwyn, March 21, and Meadville, March 22; New Jersey, Fort Mott, March 16, and Pennsville, March 20; New York, Syracuse, February 26, Branchport, March 5, Orient Point, March 12, Buffalo, March 13, Brockport, March 18, Lansing, March 29, Oswego, April 1, and Ithaca, April 3; Connecticut, Portland, March 18, and New Haven, March 19; Massachusetts, Lynn, March 2, Newburyport, March 8, Boston, March 19, Somerset, March 21, and Salem, March 21; Vermont, Rutland, April 2; Maine, Farmington, April 6, and Lewiston, April 8; Quebec, Quebec, April 18, Montreal, April 19, and Godbout, May 5; New Brunswick, Scotch Lake, April 5, Petitcodiac, April 27, and Chatham, April 28; Nova Scotia, Halifax, April 5, Pictou, April 11, and Kentville, April 19; Kentucky, Bowling Green, February 24, Guthrie, February 25, and Russellville, February 26; Missouri, St. Louis, February 17, Old Orchard, February 20, Chillicothe, March 2, Jonesburg, March 11, and Kansas City, March 14; Illinois, Lebanon, February 11, Odin, March 6, Addison, March 10, Carlinville, March 11, Englewood, March 15, Morgan Park, March 17, Rockford, March 19, and Wheaton, March 26; Indiana, Bicknell, February 13, Greensburg, February 28, Frankfort, March 4, Greencastle, March 5, Bloomington, March 6, Brookville, March 7, Terre Haute, March 9, Vincennes, March 11, and Waterloo, March 12; Ohio, Granville, March 3, Cleveland, March 4, Columbus, March 8, Hudson, March 11, Sandusky, March 13, Oberlin, March 15, and New Bremen, March 18; Michigan, Ann Arbor, March 6, Vicksburg, March 18, Hillsdale, March 21, Kalamazoo, March 22, Battle Creek, March 24, Manchester, March 25, and Detroit, March 28; Ontario, Dunnville, March 24, Madoc, March 29, Queensboro, March 30, and Listowel, April 1; Iowa, Sabula, March 15, Boone, March 17, Grinnell, March 18, Keokuk, March 18, Coralville, March 19, Wall Lake, March 22, Cedar Rapids, March 23, and Sioux City, March 28; Wisconsin. Hillside, March 16, Madison, March 18, Elkhorn, March 19, Waukesha, March 20, Delavan, March 23, and Racine, March 24; Minnesota, Hutchinson, March 30, Minneapolis, March 29, Heron Lake, April 1, and Elk River, April 2; Oklahoma, Copan, March 8; Kansas, Emporia, March 14, Independence, March 19, and Wichita, March 19; Nebraska, Falls City, March 15, and Badger, March 25; South Dakota, Forestburg, March 12, Huron, March 15, and Sioux Falls, March 15; North Dakota, Fargo, April 15, Larimore, April 16, Lisbon, April 18, and Grafton, April 19; Manitoba, Greenridge, April 2, Dalton, April 8, Reaburn, April 9, Margaret, April 10, Aweme, April 14, and Shell River, April 16; Saskatchewan, Qu'Appelle, April 9, and Indian Head, April 20; Colorado, Denver, March 10, Boulder, March 19, and Sweetwater Lake, March 26; Wyoming, Yellowstone Park, March 16; Idaho, Neeley, March 24, Meridian, April 9, and Payette Lake, April 17; Montana, Missoula, March 4, Helena, March 12, and Columbia Falls, March 27; Alberta, Onoway, April 13, Carvel, April 15, and Edmonton, April 21; and Mackenzie, Fort Providence, May 2, and Fort Simpson, May 10.
Late dates of departure in the spring are: Costa Rica, February 16; Haiti, April 13; Florida, Tallahassee, April 10, Fruitland Park, April 10, Gainesville, April 15, and St. Marks, May 10; Georgia, Cumberland, April 14, and Savannah, April 15; South Carolina, Columbia, April 19, and Charleston, May 1; Chihuahua, Lake Palomas, April 8; Lower California, Colnett, April 8, and Salton River, April 19; and Texas, Kerrville, April 11, Bonham, April 30, and Austin, April 30.
Fall migration.—Early dates of arrival in the fall are: Texas, Tivoli, August 19; Lower California, San Jose del Cabo, August 28; Chihuahua, Janos River, September 5, and Chuechupa, September 19; Sonora, August 19; South Carolina, Frogmore, September 10; Georgia, Savannah, September 15; Florida, St. Marks, September 12; Lesser Antilles, St. Croix, September 24, and Barbadoes, October 11; Porto Rico, Guanica Lagoon, September 29; Costa Rica, October 9; and Panama, Canal Zone, October 7.
Late dates of departure in the fall are: Montana, Big Sandy, October 24, and Missoula, December 5; Idaho, Meridian, November 21, and Ketchum, December 20; Wyoming, Sundance, November 25, and Yellowstone Park, December 9; Utah, Provo, November 25; Colorado, Greeley, November 3, and Boulder, December 24; Manitoba, Killarney, October 24, Aweme, November 5, and Margaret, November 10; North Dakota, Chase Lake, October 21, Westhope, November 3, and Marstonmoor, November 3; South Dakota, Harrison, October 24, and Sioux Falls, November 22; Nebraska, Falls City, November 20, Crawford, December 7, and Broken Bow, December 12; Kansas, Independence, December 13; Minnesota, Elk River, November 1, Jackson, November 6, Parkers Prairie, November 7, Fort Snelling, November 13, and Heron Lake, November 14; Wisconsin, Unity, November 3, Madison, November 6, Elkhorn, November 8, Shiocton, November 13, North Freedom, November 14, and Milwaukee, November 15; Iowa, Davenport, November 2, Grinnell, November 4, Hillsboro, November 11, Indianola, November 15, Marshalltown, November 18, Wall Lake, November 28, and Keokuk, November 28; Ontario, Toronto, October 29, Longpoint, November 2, Windsor, November 9, Kingston, November 12, Ottawa, November 17, and Point Pelee, November 21; Michigan, Hillsdale, November 3, Ann Arbor, November 5, Manistee, November 7, Manchester, November 12, Detroit, November 15, and Vicksburg, December 30; Ohio, Scio, November 6, Salem, November 16, Oberlin, November 22, Youngstown, November 21, Sandusky, December 2, and Cleveland, December 29; Indiana, Bloomington, October 24, Bicknell, November 9, and Lyons, November 25; Illinois, Glen Ellyn, November 4, Canton, November 8, Fernwood, November 13, Lawrenceville, November 15, Elgin, November 17, and La Grange, November 23; Missouri, St. Louis, November 21, and St. Charles County, December 14; Nova Scotia, Pictou, October 24, and Halifax, December 3; New Brunswick, Scotch Lake, October 20, and St. John, November 5; Quebec, Quebec, November 5, and Montreal, November 13; Maine, Lewiston, November 5, Ellsworth, November 8, and Portland, November 15; Massachusetts, East Templeton, November 23, Salem, November 25, Lynn, December 20, and Belchertown, December 20; Rhode Island, Newport, December 3; Connecticut, New Haven, December 1, Portland, December 7, and Lakeville, December 28; New York, Geneva, November 3, West Winfield, November 13, Fair Haven Light, November 17, Branchport, November 24, Shelter Island, November 29, Madison County, December 10, and Orient Point, December 20; New Jersey, Bloomfield, November 1, Camden, November 7, Egg Island, November 8, and Pennsville, December 1; Pennsylvania, Berwyn, November 1, and Erie, November 21; and District of Columbia, Washington, December 22.
Casual records.—A Wilson's snipe was killed at Naaleho Plantation, Kau, Hawaiian Islands, several years prior to 1900 and a second was reported as seen in the same locality in the fall of the same year (Henshaw, 1902). It also has been reported as taken in Great Britain, but the record is too doubtful to warrant serious consideration.
Egg dates.—Magdalen Islands: 36 records, June 1 to 27; 18 records, June 3 to 14. Alberta: 39 records, May 16 to July; 20 records, May 28 to June 10. Utah: 48 records, May 8 to July 24; 24 records, May 12 to June 2.