Native to:
Alabama,
Alaska,
Alberta,
Angola,
Argentina Northwest,
Arkansas,
Assam,
Azores,
Bahamas,
Baltic States,
Bangladesh,
Belgium,
Belize,
Bermuda,
Bolivia,
Borneo,
Botswana,
British Columbia,
Burundi,
California,
Cameroon,
Canary Is.,
Cape Provinces,
Caprivi Strip,
Cayman Is.,
Chile North,
China South-Central,
China Southeast,
Colombia,
Comoros,
Connecticut,
Costa Rica,
Cuba,
Delaware,
Denmark,
District of Columbia,
Dominican Republic,
East Himalaya,
Ecuador,
El Salvador,
Eritrea,
Ethiopia,
Finland,
Florida,
France,
Free State,
Georgia,
Germany,
Great Britain,
Guatemala,
Gulf of Guinea Is.,
Hainan,
Haiti,
Honduras,
Ireland,
Jamaica,
Japan,
Jawa,
Kamchatka,
Kenya,
Khabarovsk,
Korea,
Kuril Is.,
KwaZulu-Natal,
Labrador,
Leeward Is.,
Lesotho,
Lesser Sunda Is.,
Louisiana,
Madagascar,
Madeira,
Magadan,
Maine,
Malawi,
Malaya,
Manitoba,
Maryland,
Massachusetts,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Southeast,
Mexico Southwest,
Michigan,
Minnesota,
Mississippi,
Mozambique,
Myanmar,
Nansei-shoto,
Nepal,
Netherlands,
New Brunswick,
New Guinea,
New Hampshire,
New Jersey,
New York,
Newfoundland,
Nicaragua,
North Carolina,
North European Russi,
Northern Provinces,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Nunavut,
Ohio,
Oklahoma,
Ontario,
Oregon,
Panamá,
Pennsylvania,
Peru,
Philippines,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Puerto Rico,
Québec,
Rhode I.,
Rwanda,
Sakhalin,
Saskatchewan,
Saudi Arabia,
South Carolina,
Southwest Caribbean,
Spain,
Sudan,
Sulawesi,
Sumatera,
Swaziland,
Sweden,
Taiwan,
Tanzania,
Texas,
Thailand,
Turks-Caicos Is.,
Uganda,
Venezuela,
Vermont,
Vietnam,
Virginia,
Washington,
Windward Is.,
Wisconsin,
Yemen,
Yukon,
Zambia,
Zaïre,
Zimbabwe
Introduced into:
Hawaii,
Illinois,
Marianas,
Ogasawara-shoto