Native to:
Afghanistan,
Alabama,
Albania,
Alberta,
Algeria,
Andaman Is.,
Angola,
Argentina Northeast,
Argentina Northwest,
Argentina South,
Arizona,
Arkansas,
Assam,
Austria,
Bahamas,
Baleares,
Bangladesh,
Benin,
Bolivia,
Borneo,
Botswana,
Brazil North,
Brazil Northeast,
Brazil South,
Brazil West-Central,
British Columbia,
Bulgaria,
Burkina,
Burundi,
California,
Cambodia,
Cameroon,
Canary Is.,
Cape Provinces,
Cape Verde,
Central African Repu,
Chad,
Chile Central,
China North-Central,
China South-Central,
China Southeast,
Colombia,
Colorado,
Comoros,
Costa Rica,
Cuba,
Czechoslovakia,
Dominican Republic,
East European Russia,
East Himalaya,
Ecuador,
Egypt,
Eritrea,
Ethiopia,
Florida,
France,
Free State,
French Guiana,
Gambia,
Germany,
Ghana,
Greece,
Guatemala,
Guinea,
Guinea-Bissau,
Guyana,
Hainan,
Hawaii,
Honduras,
Hungary,
Idaho,
India,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Italy,
Jamaica,
Japan,
Jawa,
Kansas,
Kazakhstan,
Kenya,
Korea,
KwaZulu-Natal,
Laos,
Leeward Is.,
Lesotho,
Lesser Sunda Is.,
Liberia,
Libya,
Louisiana,
Madagascar,
Malawi,
Malaya,
Mali,
Manchuria,
Mauritania,
Mauritius,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Mexico Southeast,
Mexico Southwest,
Minnesota,
Mississippi,
Montana,
Morocco,
Mozambique,
Namibia,
Nansei-shoto,
Nebraska,
Netherlands,
Netherlands Antilles,
Nevada,
New Caledonia,
New Guinea,
New Mexico,
New South Wales,
Nicaragua,
Niger,
Nigeria,
North Dakota,
Northern Provinces,
Northern Territory,
Northwest European R,
Oklahoma,
Oman,
Oregon,
Pakistan,
Palestine,
Panamá,
Paraguay,
Peru,
Philippines,
Poland,
Portugal,
Puerto Rico,
Qinghai,
Queensland,
Romania,
Rwanda,
Réunion,
Sardegna,
Saskatchewan,
Saudi Arabia,
Senegal,
Sinai,
Socotra,
South Australia,
South Dakota,
Spain,
Sri Lanka,
Sudan,
Sulawesi,
Suriname,
Swaziland,
Switzerland,
Taiwan,
Tanzania,
Tasmania,
Texas,
Thailand,
Transcaucasus,
Tunisia,
Turkey,
Turks-Caicos Is.,
Uganda,
Ukraine,
Uruguay,
Utah,
Uzbekistan,
Venezuela,
Victoria,
Vietnam,
Washington,
West Himalaya,
Western Australia,
Wyoming,
Xinjiang,
Yemen,
Yugoslavia,
Zambia,
Zaïre,
Zimbabwe
Introduced into:
Azores,
Connecticut,
Delaware,
Georgia,
Great Britain,
Illinois,
Indiana,
Kentucky,
Maine,
Maryland,
Massachusetts,
Michigan,
Missouri,
New Hampshire,
New Jersey,
New York,
Ohio,
Ontario,
Pennsylvania,
Rhode I.,
Trinidad-Tobago,
Vermont,
Virginia