Native to:
Alaska,
Alberta,
Aleutian Is.,
Altay,
Amur,
Argentina Northeast,
Argentina Northwest,
Argentina South,
Arizona,
British Columbia,
Buryatiya,
California,
Chile Central,
Chile South,
Colorado,
Connecticut,
Delaware,
District of Columbia,
Falkland Is.,
Finland,
Greenland,
Guatemala,
Idaho,
Illinois,
Indiana,
Iowa,
Irkutsk,
Japan,
Kamchatka,
Kansas,
Kentucky,
Khabarovsk,
Korea,
Krasnoyarsk,
Kuril Is.,
Labrador,
Magadan,
Maine,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Mexico Southeast,
Mexico Southwest,
Michigan,
Minnesota,
Missouri,
Mongolia,
Montana,
Nebraska,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New York,
Newfoundland,
North Carolina,
North Dakota,
Northwest European Russia,
Northwest Territories,
Norway,
Nova Scotia,
Nunavut,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pennsylvania,
Prince Edward I.,
Québec,
Rhode I.,
Sakhalin,
Saskatchewan,
South Carolina,
South Dakota,
Sweden,
Tennessee,
Texas,
Utah,
Vermont,
Virginia,
Washington,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Yukon
Introduced into:
Antipodean Is.,
Bulgaria,
Central European Russia,
Czechoslovakia,
Denmark,
East European Russia,
Føroyar,
Germany,
Great Britain,
Greece,
Hawaii,
Iceland,
Ireland,
Kazakhstan,
Madeira,
Malaya,
New South Wales,
New Zealand North,
New Zealand South,
Poland,
Queensland,
South Australia,
Spain,
Tasmania,
Victoria,
Western Australia