Native to:
Alaska,
Altay,
Amur,
British Columbia,
Buryatiya,
Central European Rus,
China North-Central,
China South-Central,
China Southeast,
Chita,
Czechoslovakia,
East European Russia,
East Himalaya,
Inner Mongolia,
Irkutsk,
Japan,
Kamchatka,
Khabarovsk,
Korea,
Krasnoyarsk,
Kuril Is.,
Laos,
Magadan,
Manchuria,
Manitoba,
Mongolia,
Nansei-shoto,
Nepal,
North European Russi,
Northwest Territorie,
Nunavut,
Ontario,
Poland,
Primorye,
Qinghai,
Québec,
Sakhalin,
Taiwan,
Tuva,
Ukraine,
Vietnam,
West Siberia,
Xinjiang,
Yakutskiya,
Yukon
Introduced into:
Assam,
Baleares,
Bolivia,
Borneo,
Bulgaria,
Colombia,
Costa Rica,
Cuba,
Dominican Republic,
Ecuador,
El Salvador,
France,
Guatemala,
Gulf of Guinea Is.,
Hainan,
Honduras,
Italy,
Jawa,
Lesser Sunda Is.,
Malaya,
Marianas,
Mauritius,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Mexico Southeast,
Mexico Southwest,
Pakistan,
Panamá,
Peru,
Philippines,
Portugal,
Romania,
Réunion,
Sumatera,
Tadzhikistan,
Turkmenistan,
Uzbekistan