Native to:
Alaska,
Albania,
Alberta,
Aleutian Is.,
Amur,
Arizona,
Austria,
Baltic States,
Belarus,
British Columbia,
Bulgaria,
Buryatiya,
California,
Central European Russia,
Chita,
Colorado,
Connecticut,
Czechoslovakia,
Denmark,
East European Russia,
Finland,
France,
Germany,
Great Britain,
Greece,
Greenland,
Guatemala,
Iceland,
Idaho,
Illinois,
Indiana,
Iowa,
Ireland,
Irkutsk,
Italy,
Khabarovsk,
Krasnoyarsk,
Labrador,
Maine,
Manitoba,
Maryland,
Massachusetts,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Mexico Southwest,
Michigan,
Minnesota,
Mongolia,
Montana,
Netherlands,
Nevada,
New Hampshire,
New Jersey,
New Mexico,
New York,
Newfoundland,
North Caucasus,
North Dakota,
North European Russia,
Northwest European Russia,
Northwest Territories,
Norway,
Nova Scotia,
Nunavut,
Ohio,
Ontario,
Oregon,
Pennsylvania,
Poland,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Sakhalin,
Saskatchewan,
South Dakota,
Spain,
Sweden,
Switzerland,
Texas,
Transcaucasus,
Ukraine,
Utah,
Vermont,
Virginia,
Washington,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Yakutskiya,
Yugoslavia,
Yukon
Extinct in:
Delaware