Native to:
Alabama,
Arkansas,
Belize,
Colombia,
Costa Rica,
Delaware,
Ecuador,
El Salvador,
Florida,
Galápagos,
Georgia,
Guatemala,
Honduras,
Louisiana,
Maryland,
Massachusetts,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Southeast,
Mexico Southwest,
Mississippi,
New Hampshire,
New Jersey,
New York,
Nicaragua,
North Carolina,
Ontario,
Panamá,
Pennsylvania,
Peru,
Rhode I.,
South Carolina,
Tennessee,
Texas,
Venezuela,
Vermont,
Virginia
Introduced into:
Afghanistan,
Albania,
Algeria,
Angola,
Argentina Northeast,
Argentina Northwest,
Arizona,
Assam,
Austria,
Azores,
Bahamas,
Baleares,
Belgium,
Benin,
Bermuda,
Bolivia,
Botswana,
Brazil North,
Brazil Northeast,
Brazil South,
Brazil Southeast,
Brazil West-Central,
British Columbia,
Bulgaria,
Burkina,
California,
Cambodia,
Cameroon,
Canary Is.,
Cape Provinces,
Cape Verde,
Central African Republic,
Chad,
Chile Central,
Chile North,
Chile South,
China North-Central,
China South-Central,
China Southeast,
Colorado,
Comoros,
Congo,
Connecticut,
Corse,
Cuba,
Cyprus,
Czechoslovakia,
Denmark,
District of Columbia,
Dominican Republic,
East Aegean Is.,
East Himalaya,
Egypt,
Eritrea,
Ethiopia,
Finland,
France,
Free State,
Gabon,
Gambia,
Germany,
Ghana,
Great Britain,
Greece,
Guinea,
Gulf of Guinea Is.,
Gulf States,
Hawaii,
Hungary,
Idaho,
Illinois,
India,
Indiana,
Iowa,
Iran,
Iraq,
Ireland,
Italy,
Ivory Coast,
Japan,
Juan Fernández Is.,
Kansas,
Kentucky,
Kenya,
Korea,
Kriti,
Krym,
KwaZulu-Natal,
Laos,
Lebanon-Syria,
Leeward Is.,
Lesotho,
Liberia,
Libya,
Madeira,
Maine,
Malawi,
Mali,
Manitoba,
Mauritius,
Mexico Northwest,
Michigan,
Minnesota,
Missouri,
Montana,
Morocco,
Namibia,
Nansei-shoto,
Nebraska,
Nepal,
Nevada,
New Mexico,
New South Wales,
Nigeria,
North Caucasus,
North Dakota,
North European Russia,
Northern Provinces,
Northern Territory,
Nova Scotia,
Ohio,
Oklahoma,
Oman,
Oregon,
Pakistan,
Paraguay,
Poland,
Portugal,
Primorye,
Queensland,
Québec,
Romania,
Rwanda,
Réunion,
Sardegna,
Saudi Arabia,
Senegal,
Sicilia,
Sierra Leone,
Sinai,
South Australia,
South Dakota,
Spain,
Sri Lanka,
Sudan,
Swaziland,
Sweden,
Switzerland,
Tanzania,
Thailand,
Togo,
Transcaucasus,
Tristan da Cunha,
Tunisia,
Turkey,
Uganda,
Uruguay,
Victoria,
Vietnam,
Washington,
West Himalaya,
West Virginia,
Western Australia,
Wisconsin,
Yemen,
Yugoslavia,
Zambia,
Zaïre,
Zimbabwe