Native to:
Austria,
Bulgaria,
Czechoslovakia,
France,
Germany,
Italy,
Poland,
Romania,
Switzerland,
Ukraine,
Yugoslavia
Introduced into:
Alaska,
Alberta,
Altay,
Arkansas,
Baltic States,
Belarus,
Belgium,
British Columbia,
California,
Colorado,
Connecticut,
Denmark,
Falkland Is.,
Finland,
Florida,
Georgia,
Great Britain,
Idaho,
Illinois,
Indiana,
Iowa,
Ireland,
Japan,
Kamchatka,
Kazakhstan,
Kentucky,
Kirgizstan,
Kuril Is.,
Labrador,
Maine,
Manitoba,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Montana,
New Brunswick,
New Hampshire,
New Jersey,
New South Wales,
New York,
Newfoundland,
North Carolina,
Norway,
Nova Scotia,
Ohio,
Ontario,
Oregon,
Pennsylvania,
Prince Edward I.,
Québec,
Rhode I.,
Sakhalin,
Saskatchewan,
South Dakota,
Sweden,
Tasmania,
Tennessee,
Vermont,
Victoria,
Virginia,
Washington,
West Siberia,
West Virginia,
Wisconsin,
Wyoming