Native to:
Albania,
Algeria,
Assam,
Austria,
Azores,
Baleares,
Baltic States,
Belarus,
Belgium,
Borneo,
Bulgaria,
Cameroon,
Canary Is.,
Central European Russia,
China North-Central,
China South-Central,
China Southeast,
Congo,
Corse,
Cyprus,
Czechoslovakia,
Denmark,
East Aegean Is.,
East Himalaya,
Eritrea,
Ethiopia,
Finland,
France,
Føroyar,
Gabon,
Germany,
Great Britain,
Greece,
Gulf of Guinea Is.,
Hungary,
India,
Inner Mongolia,
Iran,
Iraq,
Ireland,
Italy,
Kenya,
Kriti,
Krym,
Laos,
Lebanon-Syria,
Libya,
Madeira,
Malaya,
Manchuria,
Mauritius,
Morocco,
Myanmar,
Netherlands,
New Guinea,
North Caucasus,
Northwest European Russia,
Norway,
Pakistan,
Palestine,
Philippines,
Poland,
Portugal,
Qinghai,
Romania,
Rwanda,
Sardegna,
Saudi Arabia,
Sicilia,
Somalia,
Spain,
Sri Lanka,
Sumatera,
Sweden,
Switzerland,
Tanzania,
Thailand,
Tibet,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Uganda,
Ukraine,
Vietnam,
West Himalaya,
Xinjiang,
Yugoslavia,
Zaïre
Introduced into:
Alabama,
Amsterdam-St.Paul Is.,
Antipodean Is.,
Argentina Northeast,
Argentina Northwest,
Argentina South,
Arkansas,
Bangladesh,
Brazil West-Central,
British Columbia,
California,
Cape Provinces,
Chatham Is.,
Chile Central,
Chile South,
Christmas I.,
Colombia,
Connecticut,
Costa Rica,
Cuba,
Delaware,
Dominican Republic,
Ecuador,
El Salvador,
Falkland Is.,
Florida,
Georgia,
Haiti,
Hawaii,
Illinois,
Jamaica,
Japan,
Jawa,
Kazakhstan,
Kentucky,
Louisiana,
Macquarie Is.,
Maryland,
Massachusetts,
Mexico Central,
Mexico Gulf,
Michigan,
Mississippi,
Missouri,
New Caledonia,
New Jersey,
New Mexico,
New South Wales,
New York,
New Zealand North,
New Zealand South,
Newfoundland,
Norfolk Is.,
North Carolina,
Northern Territory,
Ohio,
Oklahoma,
Ontario,
Oregon,
Panamá,
Pennsylvania,
Queensland,
Réunion,
South Australia,
South Carolina,
South Georgia,
Taiwan,
Tasmania,
Tennessee,
Texas,
Uruguay,
Utah,
Venezuela,
Vermont,
Victoria,
Virginia,
Washington,
West Virginia,
Western Australia