Native to:
Afghanistan,
Alaska,
Albania,
Alberta,
Algeria,
Altay,
Amur,
Angola,
Argentina South,
Arizona,
Assam,
Austria,
Baltic States,
Bangladesh,
Belarus,
Belgium,
Botswana,
British Columbia,
Bulgaria,
Burundi,
Buryatiya,
California,
Cape Provinces,
Central European Rus,
Chad,
Chile Central,
Chile North,
Chile South,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colombia,
Colorado,
Connecticut,
Corse,
Czechoslovakia,
Delaware,
Denmark,
East European Russia,
East Himalaya,
Ecuador,
Egypt,
Eritrea,
Ethiopia,
Falkland Is.,
Finland,
France,
Free State,
Germany,
Great Britain,
Greece,
Greenland,
Hainan,
Hungary,
Iceland,
Idaho,
Illinois,
India,
Inner Mongolia,
Iowa,
Ireland,
Irkutsk,
Italy,
Japan,
Jawa,
Kamchatka,
Kansas,
Kazakhstan,
Kentucky,
Kenya,
Khabarovsk,
Korea,
Krasnoyarsk,
Krym,
Kuril Is.,
KwaZulu-Natal,
Laos,
Lebanon-Syria,
Lesotho,
Madagascar,
Magadan,
Maine,
Malaya,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Mexico Northeast,
Mexico Northwest,
Minnesota,
Mongolia,
Montana,
Morocco,
Myanmar,
Namibia,
Nebraska,
Nepal,
Netherlands,
Nevada,
New Brunswick,
New Guinea,
New Hampshire,
New Jersey,
New Mexico,
New South Wales,
New York,
Newfoundland,
North Caucasus,
North Dakota,
North European Russi,
Northern Provinces,
Northern Territory,
Northwest European R,
Norway,
Nova Scotia,
Ohio,
Ontario,
Oregon,
Pakistan,
Pennsylvania,
Poland,
Portugal,
Primorye,
Prince Edward I.,
Queensland,
Québec,
Rhode I.,
Romania,
Rwanda,
Sakhalin,
Saskatchewan,
Sicilia,
South Australia,
South Dakota,
South European Russi,
Spain,
Sudan,
Sweden,
Switzerland,
Taiwan,
Tanzania,
Tasmania,
Thailand,
Tibet,
Transcaucasus,
Turkey,
Turkey-in-Europe,
Uganda,
Ukraine,
Utah,
Vermont,
Victoria,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Western Australia,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yemen,
Yugoslavia,
Yukon,
Zambia,
Zimbabwe
Introduced into:
Bolivia,
Cayman Is.,
Costa Rica,
Cuba,
Guinea,
Guyana,
Honduras,
Mauritania,
Mozambique,
Nicaragua,
Paraguay,
Puerto Rico,
Senegal,
Venezuela