Doubtfully present in:
Finland
Native to:
Alaska,
Alberta,
Altay,
Amur,
Arizona,
Arkansas,
Austria,
Baltic States,
British Columbia,
California,
Central European Rus,
Chita,
Colorado,
Connecticut,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
East European Russia,
Georgia,
Greenland,
Idaho,
Indiana,
Iowa,
Irkutsk,
Italy,
Kamchatka,
Kansas,
Kazakhstan,
Kentucky,
Khabarovsk,
Krasnoyarsk,
Labrador,
Magadan,
Maine,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Missouri,
Mongolia,
Montana,
Nebraska,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New York,
Newfoundland,
North Carolina,
North Dakota,
North European Russi,
Northwest European R,
Northwest Territorie,
Nova Scotia,
Nunavut,
Ohio,
Oklahoma,
Ontario,
Oregon,
Pennsylvania,
Poland,
Primorye,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Sakhalin,
Saskatchewan,
South Carolina,
South Dakota,
Sweden,
Tennessee,
Texas,
Tuva,
Ukraine,
Utah,
Vermont,
Virginia,
Washington,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Yakutskiya,
Yugoslavia,
Yukon
Introduced into:
Alabama,
Belgium,
France,
Germany,
Great Britain,
Iceland,
Illinois,
Ireland,
Japan,
Netherlands,
Norway,
Peru,
Switzerland