Native to:
Afghanistan,
Alabama,
Albania,
Alberta,
Algeria,
Argentina Northeast,
Argentina Northwest,
Argentina South,
Arizona,
Arkansas,
Assam,
Austria,
Bahamas,
Baleares,
Baltic States,
Bangladesh,
Belarus,
Belgium,
Belize,
Benin,
Bermuda,
Bolivia,
Brazil Northeast,
Brazil South,
Brazil Southeast,
Brazil West-Central,
British Columbia,
Bulgaria,
California,
Canary Is.,
Central European Russia,
Chad,
Chile Central,
Chile North,
Chile South,
China North-Central,
China South-Central,
China Southeast,
Colombia,
Colorado,
Connecticut,
Corse,
Costa Rica,
Cuba,
Cyprus,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
Dominican Republic,
East Aegean Is.,
East European Russia,
East Himalaya,
Ecuador,
Egypt,
El Salvador,
Eritrea,
Ethiopia,
Florida,
France,
Galápagos,
Georgia,
Germany,
Greece,
Guatemala,
Hainan,
Haiti,
Honduras,
Hungary,
Idaho,
Illinois,
India,
Indiana,
Iowa,
Iran,
Iraq,
Italy,
Jamaica,
Japan,
Jawa,
Kansas,
Kentucky,
Kenya,
Kirgizstan,
Korea,
Kriti,
Krym,
KwaZulu-Natal,
Lebanon-Syria,
Libya,
Louisiana,
Maine,
Mali,
Manitoba,
Maryland,
Massachusetts,
Mauritania,
Mexican Pacific Is.,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Mexico Southeast,
Mexico Southwest,
Michigan,
Minnesota,
Mississippi,
Missouri,
Montana,
Morocco,
Myanmar,
Nansei-shoto,
Nebraska,
Nepal,
Netherlands,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New South Wales,
New York,
Nicaragua,
North Carolina,
North Caucasus,
North Dakota,
North European Russia,
Northern Provinces,
Northern Territory,
Northwest European Russia,
Nova Scotia,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pakistan,
Palestine,
Panamá,
Paraguay,
Pennsylvania,
Peru,
Philippines,
Poland,
Portugal,
Puerto Rico,
Queensland,
Québec,
Rhode I.,
Romania,
Rwanda,
Sardegna,
Saskatchewan,
Senegal,
Sicilia,
Somalia,
South Australia,
South Carolina,
South Dakota,
South European Russia,
Spain,
Sudan,
Switzerland,
Tadzhikistan,
Taiwan,
Tanzania,
Tasmania,
Tennessee,
Texas,
Thailand,
Tibet,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Uganda,
Ukraine,
Uruguay,
Utah,
Uzbekistan,
Venezuela,
Vermont,
Victoria,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Virginia,
Western Australia,
Western Sahara,
Wisconsin,
Wyoming,
Xinjiang,
Yugoslavia,
Zambia,
Zaïre,
Zimbabwe
Introduced into:
Amsterdam-St.Paul Is.,
Angola,
Azores,
Borneo,
Botswana,
Cape Provinces,
Cape Verde,
Cook Is.,
Easter Is.,
Fiji,
Free State,
Great Britain,
Hawaii,
Ireland,
Juan Fernández Is.,
Leeward Is.,
Lesotho,
Madagascar,
Madeira,
Malawi,
Malaya,
Manchuria,
Mauritius,
Mozambique,
New Caledonia,
New Guinea,
New Zealand North,
New Zealand South,
Niger,
Nigeria,
Niue,
Norfolk Is.,
Oman,
Pitcairn Is.,
Primorye,
Réunion,
Southwest Caribbean,
Sri Lanka,
St.Helena,
Swaziland,
Sweden,
Tonga,
Trinidad-Tobago,
Tristan da Cunha,
Tuamotu,
Tubuai Is.,
Venezuelan Antilles,
Windward Is.