Native to:
Afghanistan,
Alabama,
Alaska,
Albania,
Algeria,
Altay,
Amur,
Angola,
Argentina Northeast,
Argentina Northwest,
Argentina South,
Arizona,
Arkansas,
Austria,
Azores,
Baleares,
Baltic States,
Belarus,
Belgium,
Bolivia,
Botswana,
Brazil South,
Brazil Southeast,
British Columbia,
Bulgaria,
Burundi,
Buryatiya,
California,
Cameroon,
Canary Is.,
Cape Provinces,
Cape Verde,
Central European Russia,
Chile Central,
Chile North,
Chile South,
China North-Central,
Chita,
Colombia,
Colorado,
Corse,
Costa Rica,
Cyprus,
Czechoslovakia,
Denmark,
Djibouti,
East Aegean Is.,
East European Russia,
East Himalaya,
Ecuador,
Egypt,
Equatorial Guinea,
Eritrea,
Ethiopia,
Finland,
Florida,
France,
Free State,
Føroyar,
Georgia,
Germany,
Great Britain,
Greece,
Guatemala,
Gulf of Guinea Is.,
Gulf States,
Hungary,
Iceland,
Idaho,
Illinois,
India,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Japan,
Kansas,
Kazakhstan,
Kentucky,
Kenya,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kriti,
Krym,
Kuril Is.,
KwaZulu-Natal,
Lebanon-Syria,
Lesotho,
Libya,
Louisiana,
Madagascar,
Madeira,
Malawi,
Manchuria,
Maryland,
Mauritania,
Mexican Pacific Is.,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Mexico Southeast,
Mexico Southwest,
Mississippi,
Missouri,
Mongolia,
Montana,
Morocco,
Mozambique,
Namibia,
Nepal,
Netherlands,
Nevada,
New Mexico,
New York,
Nicaragua,
Nigeria,
North Carolina,
North Caucasus,
North European Russia,
Northern Provinces,
Northwest European Russia,
Norway,
Ohio,
Oklahoma,
Oregon,
Pakistan,
Palestine,
Paraguay,
Pennsylvania,
Peru,
Poland,
Portugal,
Primorye,
Romania,
Rwanda,
Sakhalin,
Sardegna,
Saudi Arabia,
Sicilia,
Sinai,
South Carolina,
South Dakota,
South European Russia,
Spain,
Sudan,
Swaziland,
Sweden,
Switzerland,
Tadzhikistan,
Tanzania,
Tennessee,
Texas,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Tuva,
Uganda,
Ukraine,
Uruguay,
Utah,
Uzbekistan,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Wyoming,
Xinjiang,
Yakutskiya,
Yemen,
Yugoslavia,
Yukon,
Zambia,
Zaïre,
Zimbabwe
Introduced into:
Alberta,
Aleutian Is.,
Amsterdam-St.Paul Is.,
Antipodean Is.,
Bahamas,
Bangladesh,
Bermuda,
Chatham Is.,
China South-Central,
China Southeast,
Connecticut,
Crozet Is.,
Cuba,
Delaware,
District of Columbia,
Dominican Republic,
Easter Is.,
Falkland Is.,
Fiji,
Greenland,
Haiti,
Hawaii,
Honduras,
Jamaica,
Jawa,
Juan Fernández Is.,
Kamchatka,
Kerguelen,
Kermadec Is.,
Labrador,
Magadan,
Maine,
Manitoba,
Massachusetts,
Michigan,
Minnesota,
Nansei-shoto,
Nebraska,
New Brunswick,
New Guinea,
New Hampshire,
New Jersey,
New South Wales,
New Zealand North,
New Zealand South,
Newfoundland,
Norfolk Is.,
North Dakota,
Northwest Territories,
Nova Scotia,
Ontario,
Panamá,
Prince Edward I.,
Puerto Rico,
Queensland,
Québec,
Rhode I.,
Réunion,
Saskatchewan,
South Australia,
South Georgia,
Sri Lanka,
St.Helena,
Taiwan,
Tasmania,
Tristan da Cunha,
Venezuela,
Vermont,
Victoria,
Western Australia,
Wisconsin