Native to:
Afghanistan,
Alabama,
Alaska,
Albania,
Alberta,
Aleutian Is.,
Algeria,
Altay,
Amur,
Antipodean Is.,
Argentina Northwest,
Argentina South,
Arizona,
Assam,
Austria,
Baleares,
Baltic States,
Bangladesh,
Belarus,
Belgium,
Bermuda,
Bolivia,
British Columbia,
Bulgaria,
Burundi,
Buryatiya,
California,
Cameroon,
Canary Is.,
Central European Rus,
Chatham Is.,
Chile Central,
Chile North,
Chile South,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colombia,
Colorado,
Comoros,
Connecticut,
Corse,
Costa Rica,
Cyprus,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
Djibouti,
Dominican Republic,
East Aegean Is.,
East European Russia,
East Himalaya,
Ecuador,
Egypt,
El Salvador,
Eritrea,
Ethiopia,
Falkland Is.,
Finland,
Florida,
France,
Føroyar,
Georgia,
Germany,
Great Britain,
Greece,
Greenland,
Guatemala,
Gulf of Guinea Is.,
Gulf States,
Hainan,
Haiti,
Honduras,
Hungary,
Iceland,
Idaho,
Illinois,
India,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Japan,
Jawa,
Kamchatka,
Kazakhstan,
Kentucky,
Kenya,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kriti,
Krym,
Kuril Is.,
Kuwait,
Labrador,
Lebanon-Syria,
Lesser Sunda Is.,
Libya,
Louisiana,
Macquarie Is.,
Madagascar,
Madeira,
Magadan,
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,
Nansei-shoto,
Nebraska,
Nepal,
Netherlands,
Nevada,
New Brunswick,
New Guinea,
New Hampshire,
New Jersey,
New Mexico,
New South Wales,
New York,
New Zealand North,
New Zealand South,
Newfoundland,
Nicaragua,
North Carolina,
North Caucasus,
North Dakota,
North European Russi,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Nunavut,
Ogasawara-shoto,
Ohio,
Oman,
Ontario,
Oregon,
Pakistan,
Palestine,
Panamá,
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,
South Australia,
South Carolina,
South Dakota,
South European Russi,
Spain,
Sri Lanka,
Sudan,
Sulawesi,
Sumatera,
Svalbard,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Tanzania,
Tasmania,
Tennessee,
Texas,
Thailand,
Tibet,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Tuva,
Uganda,
Ukraine,
Utah,
Uzbekistan,
Venezuela,
Vermont,
Victoria,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Western Australia,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yemen,
Yugoslavia,
Yukon,
Zaïre,
Zimbabwe
Introduced into:
Amsterdam-St.Paul Is,
Angola,
Argentina Northeast,
Arkansas,
Azores,
Botswana,
Brazil Northeast,
Brazil South,
Brazil Southeast,
Cape Provinces,
Cape Verde,
Crozet Is.,
Cuba,
Free State,
Galápagos,
Guinea,
Hawaii,
Jamaica,
Juan Fernández Is.,
Kansas,
Kerguelen,
KwaZulu-Natal,
Leeward Is.,
Lesotho,
Marion-Prince Edward,
Mauritius,
Namibia,
New Caledonia,
Norfolk Is.,
Northern Provinces,
Oklahoma,
South Georgia,
St.Helena,
Tristan da Cunha,
Uruguay,
Windward Is.,
Zambia