Native to:
Afghanistan,
Alabama,
Alaska,
Albania,
Alberta,
Algeria,
Altay,
Amur,
Andaman Is.,
Angola,
Argentina Northeast,
Argentina Northwest,
Arkansas,
Assam,
Austria,
Bahamas,
Baleares,
Baltic States,
Bangladesh,
Belarus,
Belgium,
Belize,
Benin,
Bolivia,
Botswana,
Brazil North,
Brazil Northeast,
Brazil South,
Brazil Southeast,
Brazil West-Central,
British Columbia,
Bulgaria,
Burkina,
Burundi,
Buryatiya,
Cambodia,
Cameroon,
Cape Provinces,
Cayman Is.,
Central African Republic,
Central European Russia,
Chad,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colombia,
Comoros,
Congo,
Connecticut,
Corse,
Costa Rica,
Cuba,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
Dominican Republic,
East European Russia,
East Himalaya,
Ecuador,
Egypt,
El Salvador,
Ethiopia,
Finland,
Florida,
France,
Free State,
French Guiana,
Gabon,
Gambia,
Georgia,
Germany,
Ghana,
Great Britain,
Greece,
Guatemala,
Guinea,
Guinea-Bissau,
Gulf of Guinea Is.,
Guyana,
Hainan,
Haiti,
Honduras,
Hungary,
Idaho,
Illinois,
India,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Ivory Coast,
Jamaica,
Japan,
Jawa,
Kamchatka,
Kansas,
Kazakhstan,
Kentucky,
Kenya,
Khabarovsk,
Korea,
Krasnoyarsk,
Kuril Is.,
KwaZulu-Natal,
Laos,
Lebanon-Syria,
Leeward Is.,
Lesser Sunda Is.,
Liberia,
Louisiana,
Madagascar,
Magadan,
Maine,
Malawi,
Malaya,
Mali,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Mauritania,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Mexico Southeast,
Mexico Southwest,
Michigan,
Minnesota,
Mississippi,
Missouri,
Mongolia,
Montana,
Morocco,
Mozambique,
Myanmar,
Namibia,
Nebraska,
Nepal,
Netherlands,
Netherlands Antilles,
New Brunswick,
New Guinea,
New Hampshire,
New Jersey,
New South Wales,
New York,
Newfoundland,
Nicaragua,
Nicobar Is.,
Niger,
Nigeria,
North Carolina,
North Caucasus,
North European Russia,
Northern Provinces,
Northern Territory,
Northwest European Russia,
Northwest Territories,
Norway,
Nova Scotia,
Ohio,
Oklahoma,
Oman,
Ontario,
Pakistan,
Palestine,
Panamá,
Paraguay,
Pennsylvania,
Peru,
Philippines,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Puerto Rico,
Queensland,
Québec,
Rhode I.,
Romania,
Rwanda,
Sakhalin,
Saskatchewan,
Senegal,
Sierra Leone,
Somalia,
South Carolina,
South European Russia,
Spain,
Sri Lanka,
Sudan,
Sumatera,
Suriname,
Swaziland,
Sweden,
Switzerland,
Taiwan,
Tanzania,
Tennessee,
Texas,
Thailand,
Tibet,
Togo,
Transcaucasus,
Trinidad-Tobago,
Tunisia,
Turkey,
Turkey-in-Europe,
Tuva,
Uganda,
Ukraine,
Uruguay,
Uzbekistan,
Venezuela,
Venezuelan Antilles,
Vermont,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Western Australia,
Windward Is.,
Wisconsin,
Xinjiang,
Yakutskiya,
Yemen,
Yugoslavia,
Yukon,
Zambia,
Zaïre,
Zimbabwe
Extinct in:
Sardegna,
Sicilia
Introduced into:
Arizona,
Ascension,
Azores,
California,
Chile Central,
Chile South,
Colorado,
Cook Is.,
Fiji,
Mauritius,
Nevada,
New Mexico,
New Zealand North,
New Zealand South,
Oregon,
Seychelles,
Society Is.,
Tubuai Is.,
Utah,
Victoria