Native to:
Alabama,
Alaska,
Alberta,
Aleutian Is.,
Austria,
British Columbia,
California,
Chita,
Colorado,
Connecticut,
Cuba,
Delaware,
Finland,
Florida,
France,
Føroyar,
Georgia,
Germany,
Great Britain,
Greenland,
Iceland,
Idaho,
Indiana,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kentucky,
Khabarovsk,
Krasnoyarsk,
Kuril Is.,
Labrador,
Louisiana,
Magadan,
Maine,
Manitoba,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Mississippi,
Montana,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New York,
Newfoundland,
North Carolina,
North European Russi,
Northwest Territorie,
Norway,
Nova Scotia,
Nunavut,
Ohio,
Ontario,
Oregon,
Pennsylvania,
Primorye,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Sakhalin,
Saskatchewan,
South Carolina,
Spain,
Sweden,
Switzerland,
Tennessee,
Ukraine,
Utah,
Vermont,
Virginia,
Washington,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Yakutskiya,
Yugoslavia,
Yukon
Introduced into:
Belgium