Native to:
Afghanistan,
Alaska,
Alberta,
Aleutian Is.,
Algeria,
Altay,
Amur,
Argentina South,
Arizona,
Austria,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
California,
Central European Rus,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colombia,
Colorado,
Connecticut,
Czechoslovakia,
Delaware,
Denmark,
East European Russia,
East Himalaya,
Ecuador,
Finland,
France,
Germany,
Great Britain,
Greece,
Greenland,
Guatemala,
Hungary,
Iceland,
Idaho,
Illinois,
Indiana,
Inner Mongolia,
Iowa,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kansas,
Kazakhstan,
Kentucky,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Krym,
Kuril Is.,
Labrador,
Magadan,
Maine,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Mexico Northwest,
Michigan,
Minnesota,
Missouri,
Mongolia,
Montana,
Morocco,
Myanmar,
Nansei-shoto,
Nebraska,
Nepal,
Netherlands,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New York,
Newfoundland,
North Caucasus,
North Dakota,
North European Russi,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Ohio,
Ontario,
Oregon,
Pakistan,
Pennsylvania,
Peru,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Québec,
Romania,
Sakhalin,
Saskatchewan,
South Dakota,
South European Russi,
Spain,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Tennessee,
Tibet,
Transcaucasus,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Tuva,
Ukraine,
Utah,
Uzbekistan,
Venezuela,
Vermont,
Virginia,
Washington,
West Himalaya,
West Siberia,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon
Introduced into:
New South Wales,
New Zealand North,
New Zealand South,
South Australia,
Victoria