Native to:
Alaska,
Albania,
Alberta,
Aleutian Is.,
Altay,
Austria,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
Central European Rus,
Chita,
Czechoslovakia,
Denmark,
East European Russia,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greece,
Greenland,
Hungary,
Iceland,
Inner Mongolia,
Iran,
Ireland,
Irkutsk,
Italy,
Kamchatka,
Kazakhstan,
Khabarovsk,
Kirgizstan,
Krasnoyarsk,
Krym,
Labrador,
Manchuria,
Manitoba,
Mongolia,
Netherlands,
New Brunswick,
New Hampshire,
New York,
Newfoundland,
North Caucasus,
North European Russi,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Nunavut,
Ontario,
Oregon,
Poland,
Portugal,
Primorye,
Québec,
Romania,
Sakhalin,
South European Russi,
Spain,
Sweden,
Switzerland,
Tadzhikistan,
Transcaucasus,
Turkey,
Turkey-in-Europe,
Tuva,
Ukraine,
Uzbekistan,
Washington,
West Siberia,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon
Introduced into:
Amur,
Arizona,
Colorado,
Connecticut,
Corse,
Idaho,
Kuril Is.,
Maine,
Massachusetts,
Michigan,
Montana,
New Mexico,
Saskatchewan,
Vermont,
Wisconsin