Native to:
Afghanistan,
Alabama,
Alaska,
Albania,
Alberta,
Algeria,
Altay,
Amur,
Andaman Is.,
Angola,
Argentina Northeast,
Argentina Northwest,
Argentina South,
Arizona,
Arkansas,
Assam,
Austria,
Bahamas,
Baleares,
Baltic States,
Bangladesh,
Belarus,
Belgium,
Belize,
Benin,
Bermuda,
Bolivia,
Botswana,
Brazil South,
British Columbia,
Bulgaria,
Burkina,
Burundi,
Buryatiya,
California,
Canary Is.,
Cape Provinces,
Cayman Is.,
Central American Pac,
Central European Rus,
Chad,
Chatham Is.,
Chile Central,
Chile North,
Chile South,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colombia,
Colorado,
Comoros,
Congo,
Connecticut,
Corse,
Costa Rica,
Cuba,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
Djibouti,
Dominican Republic,
East Aegean Is.,
East European Russia,
Easter Is.,
Ecuador,
Egypt,
El Salvador,
Eritrea,
Ethiopia,
Falkland Is.,
Finland,
Florida,
France,
Free State,
Gabon,
Gambia,
Georgia,
Germany,
Ghana,
Great Britain,
Greece,
Guatemala,
Guinea,
Guinea-Bissau,
Hainan,
Hawaii,
Honduras,
Hungary,
Idaho,
Illinois,
India,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Jamaica,
Japan,
Jawa,
Kamchatka,
Kansas,
Kazakhstan,
Kentucky,
Kenya,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kriti,
Krym,
Kuril Is.,
KwaZulu-Natal,
Labrador,
Lebanon-Syria,
Leeward Is.,
Lesotho,
Lesser Sunda Is.,
Libya,
Line Is.,
Louisiana,
Madagascar,
Madeira,
Magadan,
Maine,
Malawi,
Manchuria,
Manitoba,
Marianas,
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,
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,
Norfolk Is.,
North Carolina,
North Caucasus,
North Dakota,
North European Russi,
Northern Provinces,
Northern Territory,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Ogasawara-shoto,
Ohio,
Oklahoma,
Oman,
Ontario,
Oregon,
Pakistan,
Palestine,
Paraguay,
Pennsylvania,
Peru,
Philippines,
Phoenix Is.,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Puerto Rico,
Qinghai,
Queensland,
Québec,
Rhode I.,
Romania,
Rwanda,
Sakhalin,
Sardegna,
Saskatchewan,
Saudi Arabia,
Senegal,
Sicilia,
Sierra Leone,
Somalia,
South Australia,
South Carolina,
South Dakota,
South European Russi,
Spain,
Sri Lanka,
Sudan,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Tanzania,
Tasmania,
Tennessee,
Texas,
Thailand,
Tibet,
Transcaucasus,
Tubuai Is.,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Tuva,
Uganda,
Ukraine,
Uruguay,
Utah,
Uzbekistan,
Vanuatu,
Venezuela,
Vermont,
Victoria,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Western Australia,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yemen,
Yugoslavia,
Yukon,
Zambia,
Zaïre
Introduced into:
Cook Is.,
East Himalaya,
Haiti