Native to:
Afghanistan,
Alabama,
Albania,
Alberta,
Aldabra,
Algeria,
Altay,
Amsterdam-St.Paul Is,
Andaman Is.,
Angola,
Argentina Northeast,
Argentina Northwest,
Argentina South,
Arizona,
Arkansas,
Aruba,
Ascension,
Assam,
Austria,
Azores,
Bahamas,
Baleares,
Bangladesh,
Belarus,
Belgium,
Belize,
Benin,
Bermuda,
Bolivia,
Borneo,
Botswana,
Brazil North,
Brazil Northeast,
Brazil South,
Brazil Southeast,
Brazil West-Central,
British Columbia,
Bulgaria,
Burkina,
Burundi,
California,
Cambodia,
Cameroon,
Canary Is.,
Cape Provinces,
Cape Verde,
Caprivi Strip,
Caroline Is.,
Cayman Is.,
Central African Repu,
Central European Rus,
Chad,
Chagos Archipelago,
Chile Central,
Chile North,
Chile South,
China North-Central,
China South-Central,
China Southeast,
Christmas I.,
Cocos (Keeling) Is.,
Colombia,
Colorado,
Comoros,
Congo,
Connecticut,
Corse,
Costa Rica,
Cuba,
Cyprus,
Czechoslovakia,
Delaware,
Desventurados Is.,
District of Columbia,
Djibouti,
Dominican Republic,
East Aegean Is.,
East European Russia,
East Himalaya,
Ecuador,
Egypt,
El Salvador,
Equatorial Guinea,
Eritrea,
Ethiopia,
Fiji,
Florida,
France,
Free State,
French Guiana,
Gabon,
Galápagos,
Gambia,
Georgia,
Ghana,
Great Britain,
Greece,
Guatemala,
Guinea,
Guinea-Bissau,
Gulf of Guinea Is.,
Gulf States,
Guyana,
Hainan,
Haiti,
Hawaii,
Honduras,
Hungary,
Idaho,
Illinois,
India,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Italy,
Ivory Coast,
Jamaica,
Japan,
Jawa,
Kansas,
Kazakhstan,
Kentucky,
Kenya,
Kirgizstan,
Korea,
Kriti,
Krym,
Kuwait,
KwaZulu-Natal,
Laos,
Lebanon-Syria,
Leeward Is.,
Lesotho,
Lesser Sunda Is.,
Liberia,
Libya,
Louisiana,
Madagascar,
Maine,
Malawi,
Malaya,
Mali,
Maluku,
Manchuria,
Manitoba,
Marianas,
Marquesas,
Marshall Is.,
Maryland,
Massachusetts,
Mauritania,
Mauritius,
Mexican Pacific Is.,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Mexico Southeast,
Mexico Southwest,
Michigan,
Minnesota,
Mississippi,
Missouri,
Mongolia,
Montana,
Morocco,
Mozambique,
Mozambique Channel I,
Myanmar,
Namibia,
Nansei-shoto,
Nebraska,
Nepal,
Netherlands,
Netherlands Antilles,
Nevada,
New Brunswick,
New Caledonia,
New Guinea,
New Hampshire,
New Jersey,
New Mexico,
New South Wales,
New York,
Newfoundland,
Nicaragua,
Nicobar Is.,
Niger,
Nigeria,
Norfolk Is.,
North Carolina,
North Caucasus,
North Dakota,
Northern Provinces,
Northern Territory,
Northwest Territorie,
Nova Scotia,
Ogasawara-shoto,
Ohio,
Oklahoma,
Oman,
Ontario,
Oregon,
Pakistan,
Palestine,
Panamá,
Paraguay,
Pennsylvania,
Peru,
Philippines,
Portugal,
Prince Edward I.,
Puerto Rico,
Queensland,
Québec,
Rhode I.,
Rodrigues,
Romania,
Rwanda,
Réunion,
Sardegna,
Saskatchewan,
Saudi Arabia,
Senegal,
Seychelles,
Sicilia,
Sierra Leone,
Sinai,
Socotra,
Somalia,
South Australia,
South Carolina,
South China Sea,
South Dakota,
South European Russi,
Southwest Caribbean,
Spain,
Sri Lanka,
Sudan,
Sulawesi,
Sumatera,
Suriname,
Swaziland,
Tadzhikistan,
Taiwan,
Tanzania,
Tasmania,
Tennessee,
Texas,
Thailand,
Tibet,
Togo,
Transcaucasus,
Trinidad-Tobago,
Tristan da Cunha,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Turks-Caicos Is.,
Uganda,
Ukraine,
Uruguay,
Utah,
Uzbekistan,
Venezuela,
Venezuelan Antilles,
Vermont,
Victoria,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Western Australia,
Western Sahara,
Windward Is.,
Wisconsin,
Wyoming,
Xinjiang,
Yemen,
Yugoslavia,
Zambia,
Zaïre,
Zimbabwe
Introduced into:
Central American Pac,
Cook Is.,
Denmark,
Easter Is.,
Germany,
Gilbert Is.,
Ireland,
Kermadec Is.,
Madeira,
Nauru,
New Zealand North,
New Zealand South,
Niue,
Pitcairn Is.,
Primorye,
Samoa,
Society Is.,
Solomon Is.,
St.Helena,
Switzerland,
Tokelau-Manihiki,
Tonga,
Tuamotu,
Tubuai Is.,
Vanuatu,
Wallis-Futuna Is.