Native to:
Afghanistan,
Alabama,
Alaska,
Albania,
Alberta,
Aleutian Is.,
Algeria,
Altay,
Amur,
Argentina Northeast,
Argentina Northwest,
Arizona,
Arkansas,
Assam,
Austria,
Azores,
Baleares,
Baltic States,
Bangladesh,
Belarus,
Belgium,
Belize,
Bolivia,
Borneo,
Brazil South,
Brazil Southeast,
British Columbia,
Bulgaria,
Buryatiya,
California,
Cambodia,
Canary Is.,
Central European Russia,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colombia,
Colorado,
Connecticut,
Corse,
Costa Rica,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
East European Russia,
East Himalaya,
Ecuador,
El Salvador,
Florida,
France,
Georgia,
Germany,
Great Britain,
Greece,
Guatemala,
Hainan,
Honduras,
Hungary,
Idaho,
Illinois,
India,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Japan,
Jawa,
Kamchatka,
Kansas,
Kazakhstan,
Kazan-retto,
Kentucky,
Kenya,
Khabarovsk,
Korea,
Krasnoyarsk,
Kriti,
Krym,
Kuril Is.,
Labrador,
Laos,
Lebanon-Syria,
Lesser Sunda Is.,
Louisiana,
Madeira,
Maine,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
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 Guinea,
New Hampshire,
New Jersey,
New Mexico,
New South Wales,
New York,
Newfoundland,
North Carolina,
North Caucasus,
North Dakota,
Northwest European Russia,
Nova Scotia,
Ogasawara-shoto,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pakistan,
Palestine,
Panamá,
Paraguay,
Pennsylvania,
Peru,
Philippines,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Qinghai,
Queensland,
Québec,
Rhode I.,
Romania,
Sakhalin,
Sardegna,
Saskatchewan,
Sicilia,
South Australia,
South Carolina,
South Dakota,
South European Russia,
Spain,
Sulawesi,
Sumatera,
Switzerland,
Taiwan,
Tanzania,
Tasmania,
Tennessee,
Texas,
Thailand,
Tibet,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Tuva,
Uganda,
Ukraine,
Uruguay,
Utah,
Venezuela,
Vermont,
Victoria,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon
Introduced into:
Argentina South,
Bermuda,
Brazil North,
Brazil Northeast,
Brazil West-Central,
Burundi,
Caroline Is.,
Cayman Is.,
Chatham Is.,
Chile Central,
Chile South,
Cuba,
Cyprus,
Dominican Republic,
East Aegean Is.,
Falkland Is.,
Finland,
Gulf of Guinea Is.,
Haiti,
Hawaii,
Jamaica,
Leeward Is.,
Marianas,
Marshall Is.,
New Zealand North,
New Zealand South,
Norway,
Puerto Rico,
Rwanda,
Sweden,
Trinidad-Tobago,
Uzbekistan,
Vanuatu,
Windward Is.,
Zaïre