Native to:
Afghanistan,
Alabama,
Albania,
Algeria,
Argentina Northeast,
Argentina Northwest,
Arizona,
Arkansas,
Assam,
Austria,
Bahamas,
Baleares,
Baltic States,
Bangladesh,
Belarus,
Belgium,
Belize,
Bolivia,
Botswana,
Brazil South,
Brazil Southeast,
British Columbia,
Bulgaria,
California,
Cambodia,
Canary Is.,
Cape Provinces,
Central European Rus,
Chad,
Chile Central,
Chile North,
China North-Central,
China South-Central,
China Southeast,
Colombia,
Colorado,
Connecticut,
Corse,
Costa Rica,
Cuba,
Cyprus,
Czechoslovakia,
Denmark,
Djibouti,
Dominican Republic,
East Aegean Is.,
East European Russia,
East Himalaya,
Ecuador,
Egypt,
Eritrea,
Ethiopia,
Florida,
France,
Free State,
Galápagos,
Georgia,
Germany,
Great Britain,
Greece,
Guatemala,
Gulf States,
Haiti,
Honduras,
Hungary,
Illinois,
India,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Ireland,
Italy,
Jamaica,
Japan,
Jawa,
Kansas,
Kazakhstan,
Kentucky,
Kirgizstan,
Korea,
Kriti,
Krym,
Kuril Is.,
Kuwait,
KwaZulu-Natal,
Laos,
Lebanon-Syria,
Lesotho,
Lesser Sunda Is.,
Libya,
Madeira,
Maine,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Mauritania,
Mexican Pacific Is.,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Mexico Southeast,
Mexico Southwest,
Minnesota,
Mississippi,
Missouri,
Montana,
Morocco,
Myanmar,
Nansei-shoto,
Nebraska,
Nepal,
Netherlands,
New Guinea,
New Hampshire,
New Jersey,
New Mexico,
New South Wales,
New York,
New Zealand North,
New Zealand South,
Nicaragua,
North Caucasus,
North Dakota,
Northern Provinces,
Northern Territory,
Northwest European R,
Norway,
Ohio,
Oklahoma,
Oman,
Ontario,
Oregon,
Pakistan,
Palestine,
Panamá,
Paraguay,
Pennsylvania,
Peru,
Philippines,
Poland,
Portugal,
Primorye,
Queensland,
Québec,
Rhode I.,
Romania,
Sardegna,
Saskatchewan,
Saudi Arabia,
Sicilia,
Sinai,
Socotra,
Somalia,
South Australia,
South Dakota,
South European Russi,
Spain,
Sri Lanka,
Sudan,
Sumatera,
Swaziland,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Tanzania,
Tasmania,
Tennessee,
Texas,
Thailand,
Tibet,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Turks-Caicos Is.,
Ukraine,
Uruguay,
Uzbekistan,
Venezuela,
Vermont,
Victoria,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
Western Australia,
Western Sahara,
Wisconsin,
Wyoming,
Xinjiang,
Yemen,
Yugoslavia
Introduced into:
Azores,
New Caledonia,
Niue,
Samoa,
Tonga,
Wallis-Futuna Is.,
West Virginia