Native to:
Alaska,
Alberta,
Aleutian Is.,
Altay,
Arizona,
Austria,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
California,
Colorado,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
Finland,
Florida,
France,
Georgia,
Germany,
Greenland,
Hungary,
Idaho,
Italy,
Japan,
Kamchatka,
Kazakhstan,
Khabarovsk,
Krasnoyarsk,
Kuril Is.,
Labrador,
Magadan,
Maine,
Manitoba,
Maryland,
Michigan,
Minnesota,
Mongolia,
Montana,
Netherlands,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
Newfoundland,
North Carolina,
North Dakota,
North European Russia,
Northwest Territories,
Norway,
Nova Scotia,
Nunavut,
Ontario,
Oregon,
Pennsylvania,
Poland,
Portugal,
Québec,
Romania,
Sakhalin,
Saskatchewan,
South Carolina,
South Dakota,
Spain,
Sweden,
Switzerland,
Tuva,
Ukraine,
Utah,
Virginia,
Washington,
West Siberia,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon
Introduced into:
West Himalaya