Native to:
Afghanistan,
Alabama,
Alaska,
Albania,
Alberta,
Algeria,
Altay,
Amur,
Angola,
Argentina Northeast,
Argentina Northwest,
Argentina South,
Arizona,
Arkansas,
Ascension,
Assam,
Austria,
Azores,
Baleares,
Baltic States,
Bangladesh,
Belarus,
Belgium,
Belize,
Bismarck Archipelago,
Bolivia,
Borneo,
Botswana,
Brazil Northeast,
Brazil South,
Brazil Southeast,
Brazil West-Central,
British Columbia,
Bulgaria,
Burundi,
Buryatiya,
California,
Cambodia,
Cameroon,
Canary Is.,
Cape Provinces,
Caroline Is.,
Central African Repu,
Central European Rus,
Chile Central,
Chile North,
Chile South,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colombia,
Colorado,
Congo,
Connecticut,
Corse,
Costa Rica,
Cuba,
Cyprus,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
Dominican Republic,
East Aegean Is.,
East European Russia,
East Himalaya,
Ecuador,
Egypt,
El Salvador,
Eritrea,
Ethiopia,
Falkland Is.,
Finland,
Florida,
France,
Free State,
Føroyar,
Gabon,
Georgia,
Germany,
Great Britain,
Greece,
Greenland,
Guatemala,
Guinea,
Gulf of Guinea Is.,
Guyana,
Hainan,
Haiti,
Hawaii,
Honduras,
Hungary,
Iceland,
Idaho,
Illinois,
India,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Ivory Coast,
Jamaica,
Japan,
Jawa,
Kamchatka,
Kansas,
Kazakhstan,
Kazan-retto,
Kentucky,
Kenya,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kriti,
Krym,
Kuril Is.,
KwaZulu-Natal,
Labrador,
Laos,
Lebanon-Syria,
Leeward Is.,
Lesotho,
Lesser Sunda Is.,
Liberia,
Libya,
Louisiana,
Madagascar,
Madeira,
Magadan,
Maine,
Malawi,
Malaya,
Maluku,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Mexico Southeast,
Mexico Southwest,
Michigan,
Minnesota,
Mississippi,
Missouri,
Mongolia,
Montana,
Morocco,
Mozambique,
Myanmar,
Namibia,
Nansei-shoto,
Nebraska,
Nepal,
Netherlands,
Nevada,
New Brunswick,
New Caledonia,
New Guinea,
New Hampshire,
New Jersey,
New Mexico,
New South Wales,
New York,
New Zealand North,
New Zealand South,
Newfoundland,
Nicaragua,
Nigeria,
North Carolina,
North Caucasus,
North Dakota,
North European Russi,
Northern Provinces,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Nunavut,
Ogasawara-shoto,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pakistan,
Palestine,
Panamá,
Paraguay,
Pennsylvania,
Peru,
Philippines,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Qinghai,
Queensland,
Québec,
Rhode I.,
Romania,
Rwanda,
Réunion,
Sakhalin,
Sardegna,
Saskatchewan,
Saudi Arabia,
Sicilia,
Sierra Leone,
Sinai,
Solomon Is.,
South Australia,
South Carolina,
South Dakota,
South European Russi,
Spain,
Sri Lanka,
St.Helena,
Sulawesi,
Sumatera,
Svalbard,
Swaziland,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Tanzania,
Tasmania,
Tennessee,
Texas,
Thailand,
Tibet,
Togo,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Tuva,
Uganda,
Ukraine,
Utah,
Uzbekistan,
Vanuatu,
Venezuela,
Vermont,
Victoria,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yemen,
Yugoslavia,
Yukon,
Zambia,
Zaïre,
Zimbabwe
Introduced into:
Comoros,
Galápagos,
Juan Fernández Is.,
Marquesas,
Mauritius,
Puerto Rico,
Rodrigues,
Society Is.,
Trinidad-Tobago,
Tubuai Is.,
Uruguay,
Western Australia