Doubtfully present in:
Baltic States
Native to:
Alaska,
Albania,
Alberta,
Aleutian Is.,
Altay,
Amur,
Argentina South,
Austria,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
California,
Central European Russia,
Chile Central,
Chile South,
China North-Central,
Chita,
Czechoslovakia,
Denmark,
East European Russia,
Falkland Is.,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greenland,
Iceland,
Inner Mongolia,
Ireland,
Irkutsk,
Japan,
Kamchatka,
Kazakhstan,
Khabarovsk,
Korea,
Krasnoyarsk,
Kuril Is.,
Labrador,
Magadan,
Maine,
Manchuria,
Manitoba,
Michigan,
Minnesota,
Mongolia,
Netherlands,
New Brunswick,
New Hampshire,
New York,
Newfoundland,
North Caucasus,
North European Russia,
Northwest European Russia,
Northwest Territories,
Norway,
Nova Scotia,
Nunavut,
Ontario,
Oregon,
Poland,
Primorye,
Prince Edward I.,
Québec,
Romania,
Sakhalin,
Saskatchewan,
Spain,
Svalbard,
Sweden,
Switzerland,
Transcaucasus,
Tristan da Cunha,
Turkey,
Tuva,
Ukraine,
Vermont,
Washington,
West Siberia,
Yakutskiya,
Yugoslavia,
Yukon
Extinct in:
Juan Fernández Is.
Introduced into:
South Georgia