Native to:
Afghanistan,
Alaska,
Albania,
Altay,
Amur,
Austria,
Azores,
Baltic States,
Belarus,
Belgium,
Bulgaria,
Buryatiya,
Canary Is.,
Central European Russia,
China North-Central,
Chita,
Cyprus,
Czechoslovakia,
Denmark,
East Aegean Is.,
East European Russia,
Egypt,
Finland,
France,
Føroyar,
Germany,
Great Britain,
Greece,
Greenland,
Gulf States,
Hungary,
Iceland,
India,
Inner Mongolia,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kazakhstan,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Krym,
Kuril Is.,
Lebanon-Syria,
Libya,
Magadan,
Manchuria,
Manitoba,
Mongolia,
Netherlands,
North Caucasus,
North European Russia,
Northwest European Russia,
Northwest Territories,
Norway,
Nunavut,
Ontario,
Pakistan,
Palestine,
Poland,
Portugal,
Primorye,
Québec,
Romania,
Sakhalin,
Sardegna,
Saudi Arabia,
Sinai,
South European Russia,
Spain,
Sweden,
Switzerland,
Tadzhikistan,
Transcaucasus,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Tuva,
Ukraine,
Uzbekistan,
West Himalaya,
West Siberia,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon
Introduced into:
Alabama,
Alberta,
Bolivia,
Borneo,
British Columbia,
California,
Chatham Is.,
China Southeast,
Colorado,
Connecticut,
Cuba,
Florida,
Idaho,
Illinois,
Iowa,
Jawa,
Kansas,
Kentucky,
Labrador,
Maine,
Malaya,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Missouri,
Montana,
Nebraska,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New South Wales,
New York,
New Zealand North,
New Zealand South,
Newfoundland,
North Dakota,
Nova Scotia,
Ohio,
Oregon,
Pennsylvania,
Philippines,
Prince Edward I.,
Saskatchewan,
South Dakota,
Sulawesi,
Sumatera,
Tasmania,
Uruguay,
Utah,
Victoria,
Washington,
Wisconsin,
Wyoming