Native to:
Albania,
Algeria,
Altay,
Amur,
Austria,
Baltic States,
Belarus,
Belgium,
Bulgaria,
Buryatiya,
Canary Is.,
Cape Provinces,
Central European Rus,
China North-Central,
China South-Central,
Chita,
Corse,
Czechoslovakia,
Denmark,
East Aegean Is.,
East European Russia,
Finland,
France,
Free State,
Føroyar,
Germany,
Great Britain,
Greece,
Greenland,
Hungary,
Iceland,
Inner Mongolia,
Iran,
Ireland,
Irkutsk,
Italy,
Kamchatka,
Kazakhstan,
Khabarovsk,
Korea,
Krasnoyarsk,
Kriti,
Kuril Is.,
KwaZulu-Natal,
Lebanon-Syria,
Lesotho,
Madeira,
Magadan,
Manchuria,
Mongolia,
Morocco,
Nepal,
Netherlands,
North Caucasus,
North European Russi,
Northern Provinces,
Northwest European R,
Norway,
Poland,
Portugal,
Primorye,
Romania,
Sakhalin,
Sardegna,
Sicilia,
South European Russi,
Spain,
Swaziland,
Sweden,
Switzerland,
Taiwan,
Transcaucasus,
Turkey,
Tuva,
Ukraine,
West Himalaya,
West Siberia,
Xinjiang,
Yakutskiya,
Yugoslavia
Introduced into:
Alabama,
Alaska,
Alberta,
Aleutian Is.,
Amsterdam-St.Paul Is,
Argentina Northeast,
Argentina Northwest,
Argentina South,
Arizona,
Arkansas,
Bolivia,
Brazil South,
Brazil Southeast,
British Columbia,
California,
Chile Central,
Chile North,
Chile South,
Colombia,
Colorado,
Connecticut,
Costa Rica,
Crozet Is.,
Cuba,
Delaware,
District of Columbia,
Dominican Republic,
East Himalaya,
Ecuador,
Falkland Is.,
Florida,
Georgia,
Guatemala,
Haiti,
Hawaii,
Idaho,
Illinois,
Indiana,
Iowa,
Jamaica,
Japan,
Juan Fernández Is.,
Kansas,
Kentucky,
Kenya,
Kerguelen,
Labrador,
Louisiana,
Maine,
Manitoba,
Marion-Prince Edward,
Maryland,
Massachusetts,
Mexico Northwest,
Mexico Southwest,
Michigan,
Minnesota,
Mississippi,
Missouri,
Montana,
Mozambique,
Nansei-shoto,
Nebraska,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New South Wales,
New York,
Newfoundland,
North Carolina,
North Dakota,
Nova Scotia,
Ohio,
Oklahoma,
Ontario,
Oregon,
Panamá,
Pennsylvania,
Peru,
Prince Edward I.,
Queensland,
Québec,
Rhode I.,
Réunion,
Saskatchewan,
South Australia,
South Carolina,
South Dakota,
South Georgia,
Sri Lanka,
St.Helena,
Svalbard,
Tasmania,
Tennessee,
Texas,
Tristan da Cunha,
Uruguay,
Utah,
Venezuela,
Vermont,
Victoria,
Vietnam,
Virginia,
Washington,
West Virginia,
Western Australia,
Wisconsin,
Wyoming,
Yukon,
Zimbabwe