Native to:
Afghanistan,
Alaska,
Albania,
Alberta,
Aleutian Is.,
Algeria,
Altay,
Arizona,
Arkansas,
Austria,
Azores,
Belarus,
Belgium,
British Columbia,
Bulgaria,
Buryatiya,
California,
Canary Is.,
Central European Rus,
China North-Central,
China South-Central,
China Southeast,
Colorado,
Connecticut,
Cyprus,
Czechoslovakia,
Delaware,
Denmark,
East Aegean Is.,
East European Russia,
Egypt,
Finland,
France,
Germany,
Greece,
Greenland,
Gulf States,
Hungary,
Idaho,
Illinois,
India,
Indiana,
Iowa,
Iran,
Iraq,
Irkutsk,
Italy,
Kansas,
Kazakhstan,
Kentucky,
Kirgizstan,
Korea,
Krasnoyarsk,
Kriti,
Krym,
Kuwait,
Lebanon-Syria,
Libya,
Louisiana,
Maine,
Manchuria,
Manitoba,
Maryland,
Massachusetts,
Mexican Pacific Is.,
Mexico Northwest,
Michigan,
Minnesota,
Mississippi,
Missouri,
Mongolia,
Montana,
Morocco,
Myanmar,
Netherlands,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New York,
North Carolina,
North Caucasus,
North Dakota,
Northwest European R,
Northwest Territorie,
Norway,
Nova Scotia,
Nunavut,
Ohio,
Oklahoma,
Oman,
Ontario,
Oregon,
Pakistan,
Palestine,
Pennsylvania,
Portugal,
Prince Edward I.,
Québec,
Rhode I.,
Romania,
Sardegna,
Saskatchewan,
Saudi Arabia,
Sicilia,
Sinai,
South Carolina,
South Dakota,
South European Russi,
Spain,
Sweden,
Switzerland,
Tadzhikistan,
Tennessee,
Texas,
Transcaucasus,
Tunisia,
Turkey,
Turkey-in-Europe,
Turkmenistan,
Tuva,
Ukraine,
Utah,
Uzbekistan,
Vermont,
Vietnam,
Virginia,
Washington,
West Himalaya,
West Siberia,
West Virginia,
Wisconsin,
Wyoming,
Xinjiang,
Yakutskiya,
Yugoslavia,
Yukon
Introduced into:
Alabama,
Amur,
Assam,
Baleares,
Baltic States,
Bolivia,
Chatham Is.,
Colombia,
Corse,
Costa Rica,
Cuba,
District of Columbia,
Dominican Republic,
Ecuador,
El Salvador,
Ethiopia,
Føroyar,
Great Britain,
Guatemala,
Honduras,
Iceland,
Inner Mongolia,
Ireland,
Japan,
Jawa,
Juan Fernández Is.,
Kamchatka,
Khabarovsk,
Kuril Is.,
Labrador,
Leeward Is.,
Magadan,
Mali,
Mexico Southeast,
New South Wales,
Newfoundland,
Nicaragua,
North European Russi,
Paraguay,
Peru,
Poland,
Primorye,
Sakhalin,
South Australia,
South Georgia,
Tasmania,
Uruguay,
Victoria,
Western Australia