Native to:
Afghanistan,
Alaska,
Alberta,
Altay,
Andaman Is.,
Assam,
Bangladesh,
Bismarck Archipelago,
Borneo,
British Columbia,
California,
Cambodia,
Central European Russia,
China North-Central,
China South-Central,
China Southeast,
Colorado,
East Aegean Is.,
East European Russia,
East Himalaya,
Hainan,
Idaho,
India,
Inner Mongolia,
Iran,
Japan,
Jawa,
Kazakhstan,
Kazan-retto,
Kirgizstan,
Korea,
Kuril Is.,
Laos,
Lebanon-Syria,
Lesser Sunda Is.,
Malaya,
Maluku,
Manchuria,
Manitoba,
Minnesota,
Mongolia,
Montana,
Myanmar,
Nansei-shoto,
Nepal,
New Guinea,
North Caucasus,
North Dakota,
Northwest Territories,
Nunavut,
Ogasawara-shoto,
Ontario,
Pakistan,
Palestine,
Philippines,
Qinghai,
Queensland,
Québec,
Saskatchewan,
Solomon Is.,
South Dakota,
South European Russia,
Sri Lanka,
Sulawesi,
Sumatera,
Tadzhikistan,
Taiwan,
Texas,
Thailand,
Tibet,
Transcaucasus,
Turkey,
Turkmenistan,
Ukraine,
Utah,
Uzbekistan,
Vietnam,
Washington,
West Himalaya,
West Siberia,
Wyoming,
Xinjiang,
Yukon
Introduced into:
Alabama,
Albania,
Algeria,
Argentina Northeast,
Argentina South,
Arizona,
Arkansas,
Austria,
Azores,
Baltic States,
Belgium,
Bermuda,
Bulgaria,
Connecticut,
Costa Rica,
Cyprus,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
Finland,
Florida,
France,
Georgia,
Great Britain,
Greece,
Hawaii,
Hungary,
Illinois,
Indiana,
Iowa,
Iraq,
Ireland,
Italy,
Kansas,
Kentucky,
Kriti,
Krym,
Louisiana,
Madeira,
Maine,
Maryland,
Massachusetts,
Mauritius,
Michigan,
Mississippi,
Missouri,
Morocco,
Nebraska,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New York,
New Zealand North,
North Carolina,
Norway,
Nova Scotia,
Ohio,
Oklahoma,
Oregon,
Pennsylvania,
Poland,
Primorye,
Rhode I.,
Romania,
South Carolina,
Spain,
Sweden,
Tennessee,
Tunisia,
Turkey-in-Europe,
Vermont,
Virginia,
West Virginia,
Wisconsin