Native to:
Afghanistan,
Alabama,
Alaska,
Albania,
Alberta,
Altay,
Amur,
Argentina South,
Arizona,
Arkansas,
Assam,
Austria,
Azores,
Baltic States,
Belarus,
Belgium,
Bolivia,
British Columbia,
Bulgaria,
Buryatiya,
California,
Central European Rus,
Chile Central,
Chile South,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colorado,
Connecticut,
Corse,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
East European Russia,
East Himalaya,
Finland,
Florida,
France,
Georgia,
Germany,
Great Britain,
Greece,
Guatemala,
Hawaii,
Hungary,
Iceland,
Idaho,
Illinois,
India,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Ireland,
Irkutsk,
Italy,
Japan,
Kansas,
Kazakhstan,
Kentucky,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Krym,
Kuril Is.,
Labrador,
Lebanon-Syria,
Louisiana,
Madeira,
Maine,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Mexico Southwest,
Michigan,
Minnesota,
Mississippi,
Missouri,
Mongolia,
Montana,
Myanmar,
Nebraska,
Nepal,
Netherlands,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New York,
Newfoundland,
North Carolina,
North Caucasus,
North Dakota,
North European Russi,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Nunavut,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pakistan,
Pennsylvania,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Qinghai,
Québec,
Rhode I.,
Romania,
Sakhalin,
Sardegna,
Saskatchewan,
Sicilia,
South Carolina,
South Dakota,
South European Russi,
Spain,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Tennessee,
Texas,
Tibet,
Transcaucasus,
Turkey,
Turkey-in-Europe,
Tuva,
Ukraine,
Utah,
Vermont,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon
Introduced into:
Argentina Northwest,
Baleares,
Brazil South,
Canary Is.,
Cape Provinces,
Colombia,
Ecuador,
El Salvador,
Honduras,
Ivory Coast,
Jawa,
Kenya,
Malaya,
Mauritius,
New Guinea,
New Zealand North,
New Zealand South,
Northern Provinces,
Philippines,
Pitcairn Is.,
Rwanda,
Réunion,
Sumatera,
Tanzania,
Trinidad-Tobago,
Tunisia,
Turkmenistan,
Uzbekistan