Native to:
Afghanistan,
Alaska,
Albania,
Alberta,
Aleutian Is.,
Algeria,
Altay,
Amur,
Assam,
Austria,
Azores,
Baleares,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
California,
Canary Is.,
Cape Provinces,
Cape Verde,
Central European Rus,
China North-Central,
China South-Central,
Chita,
Colorado,
Corse,
Cyprus,
Czechoslovakia,
Djibouti,
East Aegean Is.,
East European Russia,
Egypt,
France,
Free State,
Germany,
Great Britain,
Greece,
Greenland,
Gulf States,
Hungary,
Idaho,
India,
Inner Mongolia,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kazakhstan,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kriti,
Krym,
Kuril Is.,
KwaZulu-Natal,
Labrador,
Lebanon-Syria,
Lesotho,
Libya,
Madeira,
Magadan,
Manchuria,
Mexico Northwest,
Mongolia,
Montana,
Morocco,
Namibia,
Nepal,
Netherlands,
New Mexico,
North Caucasus,
North European Russi,
Northern Provinces,
Northwest European R,
Northwest Territorie,
Norway,
Nunavut,
Oman,
Pakistan,
Palestine,
Poland,
Portugal,
Primorye,
Québec,
Romania,
Sakhalin,
Sardegna,
Saudi Arabia,
Sicilia,
Sinai,
South European Russi,
Spain,
Svalbard,
Sweden,
Switzerland,
Tadzhikistan,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Tuva,
Ukraine,
Utah,
Uzbekistan,
West Himalaya,
West Siberia,
Wyoming,
Xinjiang,
Yakutskiya,
Yemen,
Yugoslavia,
Yukon
Introduced into:
Alabama,
Angola,
Argentina Northeast,
Argentina Northwest,
Argentina South,
Arizona,
Arkansas,
Bangladesh,
Bermuda,
Bolivia,
Cambodia,
Chile Central,
Chile South,
China Southeast,
Connecticut,
Cuba,
Delaware,
Denmark,
District of Columbia,
Dominican Republic,
East Himalaya,
Ecuador,
Ethiopia,
Falkland Is.,
Finland,
Hainan,
Haiti,
Honduras,
Iceland,
Illinois,
Iowa,
Juan Fernández Is.,
Kansas,
Kentucky,
Laos,
Louisiana,
Maine,
Manitoba,
Maryland,
Massachusetts,
Mexico Northeast,
Mexico Southeast,
Mexico Southwest,
Michigan,
Minnesota,
Missouri,
Myanmar,
New Brunswick,
New Hampshire,
New Jersey,
New South Wales,
New York,
New Zealand North,
Newfoundland,
Norfolk Is.,
North Carolina,
North Dakota,
Nova Scotia,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pennsylvania,
Peru,
Qinghai,
Queensland,
Rhode I.,
Saskatchewan,
South Australia,
South Carolina,
Taiwan,
Tasmania,
Tennessee,
Texas,
Thailand,
Tibet,
Tristan da Cunha,
Uruguay,
Venezuela,
Vermont,
Victoria,
Vietnam,
Virginia,
Washington,
West Virginia,
Western Australia,
Western Sahara,
Wisconsin