Native to:
Afghanistan,
Alabama,
Albania,
Alberta,
Algeria,
Altay,
Amur,
Angola,
Argentina Northeast,
Argentina Northwest,
Arizona,
Arkansas,
Assam,
Austria,
Azores,
Bahamas,
Baleares,
Baltic States,
Bangladesh,
Belarus,
Belgium,
Belize,
Bermuda,
Bolivia,
Borneo,
Botswana,
Brazil Northeast,
Brazil South,
Brazil Southeast,
British Columbia,
Bulgaria,
Burundi,
Buryatiya,
California,
Cambodia,
Cameroon,
Canary Is.,
Cape Provinces,
Caprivi Strip,
Central European Rus,
Chile Central,
Chile North,
Chile South,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colombia,
Colorado,
Comoros,
Congo,
Connecticut,
Corse,
Costa Rica,
Cuba,
Cyprus,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
Dominican Republic,
East Aegean Is.,
East European Russia,
East Himalaya,
Ecuador,
El Salvador,
Eritrea,
Ethiopia,
Finland,
Florida,
France,
Free State,
Føroyar,
Galápagos,
Georgia,
Germany,
Great Britain,
Greece,
Guatemala,
Guinea,
Gulf of Guinea Is.,
Guyana,
Hainan,
Haiti,
Honduras,
Hungary,
Idaho,
Illinois,
India,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Japan,
Jawa,
Kamchatka,
Kansas,
Kazakhstan,
Kentucky,
Kenya,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kriti,
Krym,
Kuril Is.,
KwaZulu-Natal,
Labrador,
Laos,
Lebanon-Syria,
Lesotho,
Lesser Sunda Is.,
Libya,
Louisiana,
Madagascar,
Madeira,
Maine,
Malawi,
Malaya,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
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,
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,
Northern Provinces,
Northern Territory,
Northwest European R,
Norway,
Nova Scotia,
Ohio,
Oklahoma,
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,
Sardegna,
Saskatchewan,
Saudi Arabia,
Sicilia,
Sinai,
Socotra,
Somalia,
South Australia,
South Carolina,
South Dakota,
South European Russi,
Spain,
Sri Lanka,
Sudan,
Sulawesi,
Sumatera,
Swaziland,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Tanzania,
Tasmania,
Tennessee,
Texas,
Thailand,
Tibet,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Tuva,
Uganda,
Ukraine,
Uruguay,
Utah,
Uzbekistan,
Venezuela,
Vermont,
Victoria,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Western Australia,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yemen,
Yugoslavia,
Zambia,
Zaïre,
Zimbabwe
Introduced into:
Antipodean Is.,
Argentina South,
Chatham Is.,
Crozet Is.,
Hawaii,
Juan Fernández Is.,
Mauritius