Native to:
Alaska,
Alberta,
Altay,
Amur,
Arizona,
Arkansas,
Austria,
Baltic States,
British Columbia,
California,
Central European Russia,
Chita,
Colorado,
Connecticut,
Czechoslovakia,
Delaware,
Denmark,
District of Columbia,
East European Russia,
Finland,
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 Russia,
Northwest European Russia,
Northwest Territories,
Norway,
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,
Peru,
Switzerland