Native to:
Alabama,
Albania,
Algeria,
Altay,
Amur,
Angola,
Argentina Northeast,
Argentina Northwest,
Assam,
Austria,
Bahamas,
Baltic States,
Bangladesh,
Belarus,
Belgium,
Belize,
Benin,
Bolivia,
Borneo,
Botswana,
Brazil North,
Brazil Northeast,
Brazil South,
Brazil Southeast,
Brazil West-Central,
Bulgaria,
Burkina,
Burundi,
Buryatiya,
Cambodia,
Cameroon,
Cape Provinces,
Caprivi Strip,
Cayman Is.,
Central African Republic,
Central European Russia,
Chad,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colombia,
Congo,
Connecticut,
Costa Rica,
Cuba,
Czechoslovakia,
Delaware,
Dominican Republic,
East European Russia,
East Himalaya,
Ecuador,
El Salvador,
Ethiopia,
Fiji,
Florida,
France,
French Guiana,
Gabon,
Gambia,
Georgia,
Germany,
Ghana,
Great Britain,
Greece,
Guatemala,
Guinea,
Guinea-Bissau,
Guyana,
Hainan,
Haiti,
Honduras,
Hungary,
India,
Inner Mongolia,
Iran,
Iraq,
Irkutsk,
Italy,
Ivory Coast,
Jamaica,
Japan,
Jawa,
Kazakhstan,
Kenya,
Khabarovsk,
Korea,
Krasnoyarsk,
KwaZulu-Natal,
Laos,
Leeward Is.,
Lesser Sunda Is.,
Louisiana,
Madagascar,
Maine,
Malawi,
Malaya,
Mali,
Maluku,
Manchuria,
Maryland,
Massachusetts,
Mauritius,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Southeast,
Mexico Southwest,
Mississippi,
Mongolia,
Mozambique,
Myanmar,
Namibia,
Nansei-shoto,
Nepal,
Netherlands,
New Brunswick,
New Caledonia,
New Guinea,
New Hampshire,
New Jersey,
New South Wales,
New York,
Newfoundland,
Nicaragua,
Niger,
Nigeria,
North Carolina,
North Caucasus,
North European Russia,
Northern Provinces,
Northern Territory,
Nova Scotia,
Ontario,
Pakistan,
Panamá,
Paraguay,
Pennsylvania,
Peru,
Poland,
Portugal,
Primorye,
Puerto Rico,
Queensland,
Québec,
Rhode I.,
Romania,
Réunion,
Sardegna,
Senegal,
Sierra Leone,
Somalia,
South Australia,
South Carolina,
South European Russia,
Spain,
Sri Lanka,
Sudan,
Sulawesi,
Sumatera,
Suriname,
Swaziland,
Taiwan,
Tanzania,
Texas,
Thailand,
Tibet,
Transcaucasus,
Trinidad-Tobago,
Turkey-in-Europe,
Tuva,
Uganda,
Ukraine,
Uruguay,
Uzbekistan,
Vanuatu,
Venezuela,
Vermont,
Victoria,
Vietnam,
Virginia,
West Himalaya,
West Siberia,
Western Australia,
Xinjiang,
Yakutskiya,
Yugoslavia,
Zambia,
Zaïre,
Zimbabwe
Introduced into:
Arizona,
Arkansas,
California,
Denmark,
District of Columbia,
Illinois,
Indiana,
Ireland,
Kentucky,
Missouri,
Ohio,
Oklahoma,
Sweden,
Switzerland,
Venezuelan Antilles,
Washington