Native to:
Afghanistan,
Alabama,
Alaska,
Albania,
Alberta,
Aleutian Is.,
Algeria,
Altay,
Amur,
Andaman Is.,
Angola,
Argentina Northeast,
Argentina Northwest,
Argentina South,
Arizona,
Arkansas,
Aruba,
Assam,
Austria,
Azores,
Bahamas,
Baleares,
Baltic States,
Bangladesh,
Belarus,
Belgium,
Belize,
Benin,
Bermuda,
Bismarck Archipelago,
Bolivia,
Borneo,
Botswana,
Brazil North,
Brazil Northeast,
Brazil South,
Brazil Southeast,
Brazil West-Central,
British Columbia,
Bulgaria,
Burkina,
Burundi,
Buryatiya,
California,
Cambodia,
Cameroon,
Canary Is.,
Cape Provinces,
Caroline Is.,
Cayman Is.,
Central African Repu,
Central American Pac,
Central European Rus,
Chad,
Chagos Archipelago,
Chatham Is.,
Chile Central,
Chile North,
Chile South,
China North-Central,
China South-Central,
China Southeast,
Chita,
Christmas I.,
Cocos (Keeling) Is.,
Colombia,
Colorado,
Comoros,
Congo,
Connecticut,
Cook Is.,
Corse,
Costa Rica,
Cuba,
Cyprus,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
Djibouti,
Dominican Republic,
East Aegean Is.,
East European Russia,
East Himalaya,
Ecuador,
Egypt,
El Salvador,
Equatorial Guinea,
Eritrea,
Ethiopia,
Falkland Is.,
Fiji,
Finland,
Florida,
France,
Free State,
French Guiana,
Føroyar,
Gabon,
Galápagos,
Gambia,
Georgia,
Germany,
Ghana,
Gilbert Is.,
Great Britain,
Greece,
Greenland,
Guatemala,
Guinea,
Guinea-Bissau,
Gulf of Guinea Is.,
Gulf States,
Guyana,
Hainan,
Haiti,
Hawaii,
Honduras,
Hungary,
Iceland,
Idaho,
Illinois,
India,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Ivory Coast,
Jamaica,
Japan,
Jawa,
Juan Fernández Is.,
Kamchatka,
Kansas,
Kazakhstan,
Kentucky,
Kenya,
Kermadec Is.,
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,
Mali,
Maluku,
Manchuria,
Manitoba,
Marianas,
Maryland,
Massachusetts,
Mauritania,
Mauritius,
Mexican Pacific Is.,
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,
Netherlands Antilles,
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,
Nicobar Is.,
Niger,
Nigeria,
Norfolk Is.,
North Carolina,
North Caucasus,
North Dakota,
North European Russi,
Northern Provinces,
Northern Territory,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Nunavut,
Ohio,
Oklahoma,
Oman,
Ontario,
Oregon,
Pakistan,
Palestine,
Panamá,
Paraguay,
Pennsylvania,
Peru,
Philippines,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Puerto Rico,
Qinghai,
Queensland,
Québec,
Rhode I.,
Romania,
Rwanda,
Réunion,
Sakhalin,
Samoa,
Sardegna,
Saskatchewan,
Saudi Arabia,
Senegal,
Seychelles,
Sicilia,
Sierra Leone,
Sinai,
Society Is.,
Socotra,
Solomon Is.,
Somalia,
South Australia,
South Carolina,
South Dakota,
South European Russi,
Spain,
Sri Lanka,
Sudan,
Sulawesi,
Sumatera,
Suriname,
Swaziland,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Tanzania,
Tasmania,
Tennessee,
Texas,
Thailand,
Tibet,
Togo,
Tokelau-Manihiki,
Tonga,
Transcaucasus,
Trinidad-Tobago,
Tubuai Is.,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Turks-Caicos Is.,
Tuva,
Uganda,
Ukraine,
Uruguay,
Utah,
Uzbekistan,
Venezuela,
Venezuelan Antilles,
Vermont,
Victoria,
Vietnam,
Virginia,
Wallis-Futuna Is.,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Western Australia,
Windward Is.,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yemen,
Yugoslavia,
Yukon,
Zambia,
Zaïre,
Zimbabwe
Introduced into:
Nauru