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