Native to:
Alabama,
Alaska,
Alberta,
Aleutian Is.,
Altay,
Amur,
Austria,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
California,
Central European Rus,
China Southeast,
Chita,
Colorado,
Connecticut,
Corse,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
East European Russia,
Finland,
France,
Føroyar,
Georgia,
Germany,
Great Britain,
Greece,
Greenland,
Hungary,
Iceland,
Idaho,
Illinois,
Indiana,
Iowa,
Ireland,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kentucky,
Khabarovsk,
Korea,
Krasnoyarsk,
Krym,
Kuril Is.,
Labrador,
Lebanon-Syria,
Magadan,
Maine,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Mississippi,
Montana,
Netherlands,
New Guinea,
New Hampshire,
New Jersey,
New York,
Newfoundland,
North Carolina,
North Caucasus,
North Dakota,
North European Russi,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Nunavut,
Ohio,
Ontario,
Oregon,
Pennsylvania,
Philippines,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Sakhalin,
Saskatchewan,
South Carolina,
South European Russi,
Spain,
Svalbard,
Sweden,
Switzerland,
Tennessee,
Transcaucasus,
Turkey,
Tuva,
Ukraine,
Vermont,
Virginia,
Washington,
West Siberia,
West Virginia,
Wisconsin,
Yakutskiya,
Yugoslavia,
Yukon
Introduced into:
Argentina South