Native to:
Amur,
Angola,
Assam,
Bangladesh,
Bismarck Archipelago,
Borneo,
Cambodia,
Cape Provinces,
Caroline Is.,
China North-Central,
China South-Central,
China Southeast,
Cook Is.,
East Himalaya,
Fiji,
Free State,
Gilbert Is.,
Hainan,
India,
Inner Mongolia,
Japan,
Jawa,
Kazan-retto,
Khabarovsk,
Korea,
Kuril Is.,
KwaZulu-Natal,
Laos,
Lesotho,
Lesser Sunda Is.,
Malaya,
Maluku,
Manchuria,
Marquesas,
Marshall Is.,
Myanmar,
Nansei-shoto,
Nepal,
New Caledonia,
New Guinea,
Niue,
Ogasawara-shoto,
Pakistan,
Philippines,
Primorye,
Sakhalin,
Samoa,
Society Is.,
Solomon Is.,
South China Sea,
Sulawesi,
Sumatera,
Swaziland,
Taiwan,
Thailand,
Tibet,
Tonga,
Tuamotu,
Tubuai Is.,
Vanuatu,
Vietnam,
Wallis-Futuna Is.,
West Himalaya,
Zambia,
Zimbabwe
Introduced into:
Alabama,
Arkansas,
Austria,
Brazil South,
Brazil Southeast,
Brazil West-Central,
California,
Chile Central,
Colorado,
Connecticut,
Cuba,
Czechoslovakia,
Delaware,
District of Columbia,
Egypt,
Florida,
Georgia,
Germany,
Great Britain,
Hawaii,
Illinois,
Iowa,
Italy,
Kentucky,
Louisiana,
Maine,
Marianas,
Maryland,
Massachusetts,
Mexico Southeast,
Michigan,
Minnesota,
Mississippi,
Missouri,
Nebraska,
New Jersey,
New York,
New Zealand North,
New Zealand South,
North Carolina,
Ohio,
Ontario,
Pennsylvania,
Poland,
Puerto Rico,
Québec,
Rhode I.,
South Carolina,
Tennessee,
Transcaucasus,
Turkey,
Uruguay,
Vermont,
Virginia,
West Virginia,
Wisconsin