Native to:
Afghanistan,
Albania,
Alberta,
Algeria,
Altay,
Amur,
Angola,
Arizona,
Austria,
Azores,
Baleares,
Baltic States,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Burundi,
Buryatiya,
California,
Cameroon,
Canary Is.,
Cape Provinces,
Central European Rus,
China North-Central,
China South-Central,
China Southeast,
Chita,
Colorado,
Corse,
Cyprus,
Czechoslovakia,
Denmark,
Djibouti,
East Aegean Is.,
East European Russia,
East Himalaya,
Egypt,
Eritrea,
Ethiopia,
Finland,
France,
Free State,
Germany,
Great Britain,
Greece,
Gulf States,
Hungary,
Iceland,
Idaho,
Inner Mongolia,
Iowa,
Iran,
Iraq,
Ireland,
Irkutsk,
Italy,
Japan,
Kamchatka,
Kazakhstan,
Kenya,
Khabarovsk,
Kirgizstan,
Korea,
Krasnoyarsk,
Kriti,
Krym,
Kuril Is.,
Kuwait,
KwaZulu-Natal,
Laos,
Lebanon-Syria,
Lesotho,
Libya,
Madeira,
Magadan,
Malawi,
Manchuria,
Manitoba,
Mexico Northeast,
Mexico Northwest,
Minnesota,
Mongolia,
Montana,
Morocco,
Mozambique,
Myanmar,
Nebraska,
Nepal,
Netherlands,
Nevada,
New Mexico,
Nigeria,
North Caucasus,
North Dakota,
North European Russi,
Northern Provinces,
Northwest European R,
Norway,
Oman,
Oregon,
Pakistan,
Palestine,
Poland,
Portugal,
Primorye,
Qinghai,
Romania,
Rwanda,
Sakhalin,
Sardegna,
Saskatchewan,
Saudi Arabia,
Selvagens,
Sicilia,
Sinai,
Somalia,
South Dakota,
South European Russi,
Spain,
Sudan,
Swaziland,
Sweden,
Switzerland,
Tadzhikistan,
Taiwan,
Tanzania,
Texas,
Thailand,
Tibet,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Tuva,
Uganda,
Ukraine,
Utah,
Uzbekistan,
Vietnam,
Washington,
West Himalaya,
West Siberia,
Wyoming,
Xinjiang,
Yakutskiya,
Yemen,
Yugoslavia,
Zambia,
Zaïre,
Zimbabwe
Introduced into:
Alabama,
Alaska,
Arkansas,
Assam,
Bolivia,
Chatham Is.,
Colombia,
Connecticut,
Costa Rica,
Delaware,
District of Columbia,
Ecuador,
Florida,
Georgia,
Greenland,
Hawaii,
Illinois,
Indiana,
Juan Fernández Is.,
Kentucky,
Labrador,
Louisiana,
Maine,
Maryland,
Massachusetts,
Mexico Gulf,
Michigan,
Mississippi,
Missouri,
New Brunswick,
New Hampshire,
New Jersey,
New South Wales,
New York,
New Zealand North,
Newfoundland,
North Carolina,
Northwest Territorie,
Nova Scotia,
Ohio,
Oklahoma,
Ontario,
Pennsylvania,
Peru,
Québec,
Rhode I.,
South Australia,
South Carolina,
Tasmania,
Tennessee,
Tristan da Cunha,
Uruguay,
Vermont,
Victoria,
Virginia,
West Virginia,
Western Australia,
Wisconsin,
Yukon