Native to:
Afghanistan,
Alaska,
Albania,
Alberta,
Aleutian Is.,
Algeria,
Altay,
Amur,
Argentina Northeast,
Argentina Northwest,
Argentina South,
Arizona,
Assam,
Austria,
Baleares,
Baltic States,
Belarus,
Belgium,
Bolivia,
British Columbia,
Bulgaria,
Buryatiya,
California,
Central European Russia,
Chile Central,
Chile South,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colorado,
Corse,
Cyprus,
Czechoslovakia,
Denmark,
East Aegean Is.,
East European Russia,
East Himalaya,
Ecuador,
Ethiopia,
Falkland Is.,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greece,
Greenland,
Hungary,
Iceland,
Idaho,
Inner Mongolia,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kazakhstan,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kriti,
Krym,
Kuril Is.,
Labrador,
Lebanon-Syria,
Libya,
Madeira,
Magadan,
Maine,
Manchuria,
Manitoba,
Michigan,
Minnesota,
Mongolia,
Montana,
Morocco,
Myanmar,
Nepal,
Netherlands,
Nevada,
New Brunswick,
New Hampshire,
New Mexico,
New York,
Newfoundland,
North Caucasus,
North European Russia,
Northwest European Russia,
Northwest Territories,
Norway,
Nova Scotia,
Nunavut,
Ontario,
Oregon,
Pakistan,
Palestine,
Peru,
Poland,
Portugal,
Primorye,
Qinghai,
Québec,
Romania,
Sakhalin,
Sardegna,
Saskatchewan,
Sicilia,
South Dakota,
Spain,
Svalbard,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Thailand,
Tibet,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Tuva,
Ukraine,
Utah,
Uzbekistan,
Vermont,
Vietnam,
Washington,
West Himalaya,
West Siberia,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon
Introduced into:
Alabama,
Canary Is.,
Colombia,
Georgia,
India,
Mississippi,
North Carolina,
Tennessee,
Virginia