Native to:
Afghanistan,
Alabama,
Alaska,
Albania,
Alberta,
Aleutian Is.,
Algeria,
Altay,
Amsterdam-St.Paul Is,
Argentina Northeast,
Arizona,
Arkansas,
Assam,
Austria,
Azores,
Baleares,
Baltic States,
Belarus,
Belgium,
Brazil South,
British Columbia,
Bulgaria,
Buryatiya,
California,
Cameroon,
Canary Is.,
Central European Rus,
Chile Central,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colorado,
Connecticut,
Corse,
Cyprus,
Czechoslovakia,
Delaware,
Denmark,
Dominican Republic,
East Aegean Is.,
East European Russia,
East Himalaya,
Ethiopia,
Finland,
Florida,
France,
Føroyar,
Georgia,
Germany,
Great Britain,
Greece,
Greenland,
Gulf of Guinea Is.,
Hungary,
Iceland,
Idaho,
Illinois,
India,
Indiana,
Inner Mongolia,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Japan,
Jawa,
Juan Fernández Is.,
Kamchatka,
Kansas,
Kazakhstan,
Kentucky,
Kenya,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kriti,
Krym,
Kuril Is.,
Labrador,
Lebanon-Syria,
Libya,
Louisiana,
Madeira,
Magadan,
Maine,
Maluku,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Mexico Southwest,
Michigan,
Minnesota,
Mississippi,
Missouri,
Mongolia,
Montana,
Morocco,
Nansei-shoto,
Nepal,
Netherlands,
Nevada,
New Brunswick,
New Guinea,
New Jersey,
New Mexico,
New South Wales,
New York,
Newfoundland,
North Carolina,
North Caucasus,
North European Russi,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Nunavut,
Ogasawara-shoto,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pakistan,
Palestine,
Pennsylvania,
Philippines,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Qinghai,
Québec,
Romania,
Rwanda,
Sakhalin,
Sardegna,
Saskatchewan,
Sicilia,
Sinai,
South Carolina,
South European Russi,
Spain,
Sri Lanka,
Sudan,
Sulawesi,
Svalbard,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Tanzania,
Tasmania,
Tennessee,
Texas,
Tibet,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Uganda,
Ukraine,
Uruguay,
Utah,
Uzbekistan,
Vermont,
Victoria,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon,
Zaïre
Introduced into:
Argentina Northwest,
Argentina South,
Bermuda,
Bolivia,
Brazil Southeast,
Cape Provinces,
Chile South,
Colombia,
Costa Rica,
Crozet Is.,
Ecuador,
Falkland Is.,
Free State,
Guatemala,
Hawaii,
Iowa,
Kerguelen,
KwaZulu-Natal,
Malaya,
Marion-Prince Edward,
Mauritius,
Mexico Southeast,
New Hampshire,
New Zealand North,
Norfolk Is.,
Peru,
Rhode I.,
Réunion,
South Georgia,
St.Helena,
Tristan da Cunha,
Venezuela,
West Virginia,
Wisconsin