Native to:
Afghanistan,
Alaska,
Albania,
Algeria,
Altay,
Amur,
Arizona,
Arkansas,
Assam,
Austria,
Azores,
Baleares,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
California,
Canary Is.,
Cape Provinces,
Central European Rus,
China North-Central,
China South-Central,
China Southeast,
Chita,
Connecticut,
Corse,
Cyprus,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
East Aegean Is.,
East European Russia,
East Himalaya,
Egypt,
Finland,
France,
Free State,
Georgia,
Germany,
Great Britain,
Greece,
Hungary,
Iceland,
Idaho,
Illinois,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kansas,
Kazakhstan,
Kentucky,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kriti,
Krym,
Kuril Is.,
Labrador,
Lebanon-Syria,
Libya,
Madeira,
Magadan,
Maine,
Manchuria,
Maryland,
Massachusetts,
Michigan,
Mongolia,
Montana,
Morocco,
Nepal,
Netherlands,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New York,
Newfoundland,
North Carolina,
North Caucasus,
North European Russi,
Northern Provinces,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pakistan,
Palestine,
Pennsylvania,
Poland,
Portugal,
Primorye,
Qinghai,
Québec,
Rhode I.,
Romania,
Sakhalin,
Sardegna,
Sicilia,
Sinai,
South Carolina,
South European Russi,
Spain,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Tennessee,
Texas,
Tibet,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Tuva,
Ukraine,
Uzbekistan,
Vermont,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon
Extinct in:
Sri Lanka
Introduced into:
Alabama,
Argentina Northeast,
Argentina Northwest,
Bolivia,
Chile Central,
Colorado,
New South Wales,
New Zealand North,
New Zealand South,
Peru,
Queensland,
South Australia,
Tasmania,
Utah,
Western Australia,
Wisconsin