Native to:
Afghanistan,
Alabama,
Alaska,
Albania,
Alberta,
Aleutian Is.,
Altay,
Amur,
Arizona,
Assam,
Austria,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
California,
Central European Rus,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colorado,
Corse,
Czechoslovakia,
East European Russia,
East Himalaya,
Finland,
France,
Georgia,
Germany,
Great Britain,
Greece,
Hungary,
Idaho,
Illinois,
Indiana,
Inner Mongolia,
Iowa,
Iran,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kazakhstan,
Kentucky,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Krym,
Kuril Is.,
Magadan,
Manchuria,
Maryland,
Mexico Northeast,
Mexico Northwest,
Mongolia,
Montana,
Morocco,
Myanmar,
Nepal,
Netherlands,
Nevada,
New Mexico,
New York,
North Carolina,
North Caucasus,
North European Russi,
Northwest European R,
Northwest Territorie,
Norway,
Ohio,
Oregon,
Pakistan,
Pennsylvania,
Poland,
Portugal,
Primorye,
Qinghai,
Québec,
Romania,
Sakhalin,
South Carolina,
South Dakota,
South European Russi,
Spain,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Tennessee,
Tibet,
Transcaucasus,
Turkey,
Tuva,
Ukraine,
Utah,
Uzbekistan,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon
Introduced into:
Denmark,
New Brunswick,
Newfoundland,
Nova Scotia,
Ontario,
Vermont