Native to:
Afghanistan,
Alabama,
Alaska,
Albania,
Alberta,
Algeria,
Altay,
Amur,
Arizona,
Arkansas,
Assam,
Austria,
Baleares,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
California,
Cambodia,
Central European Rus,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colorado,
Connecticut,
Corse,
Cyprus,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
East Aegean Is.,
East European Russia,
East Himalaya,
Finland,
Florida,
France,
Georgia,
Germany,
Great Britain,
Greece,
Guatemala,
Hainan,
Hungary,
Idaho,
Illinois,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Japan,
Jawa,
Kamchatka,
Kansas,
Kazakhstan,
Kentucky,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kriti,
Kuril Is.,
Labrador,
Laos,
Lebanon-Syria,
Lesser Sunda Is.,
Libya,
Louisiana,
Magadan,
Maine,
Malaya,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Mexican Pacific Is.,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Mexico Southeast,
Mexico Southwest,
Michigan,
Minnesota,
Mississippi,
Missouri,
Mongolia,
Montana,
Morocco,
Myanmar,
Nansei-shoto,
Nebraska,
Nepal,
Netherlands,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New York,
Newfoundland,
North Carolina,
North Caucasus,
North Dakota,
North European Russi,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Nunavut,
Ohio,
Oklahoma,
Oman,
Ontario,
Oregon,
Pakistan,
Palestine,
Pennsylvania,
Philippines,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Qinghai,
Québec,
Rhode I.,
Romania,
Sakhalin,
Sardegna,
Saskatchewan,
Sicilia,
South Carolina,
South Dakota,
South European Russi,
Spain,
Sumatera,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Tennessee,
Texas,
Thailand,
Tibet,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Tuva,
Ukraine,
Utah,
Uzbekistan,
Vermont,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon
Introduced into:
Argentina Northeast,
Argentina Northwest,
Ascension,
Azores,
Bangladesh,
Bermuda,
Bolivia,
Brazil South,
Canary Is.,
Cape Verde,
Cayman Is.,
Colombia,
Costa Rica,
Cuba,
Dominican Republic,
Ecuador,
El Salvador,
Falkland Is.,
Fiji,
Haiti,
Hawaii,
Honduras,
Jamaica,
Krym,
KwaZulu-Natal,
Leeward Is.,
Madeira,
Mauritius,
New Caledonia,
New Zealand North,
Norfolk Is.,
Northern Provinces,
Ogasawara-shoto,
Peru,
Pitcairn Is.,
Puerto Rico,
Rwanda,
Réunion,
Saudi Arabia,
Solomon Is.,
St.Helena,
Tasmania,
Trinidad-Tobago,
Uruguay,
Venezuela,
Windward Is.,
Zaïre