Native to:
Alabama,
Alaska,
Alberta,
Aleutian Is.,
Argentina Northeast,
Argentina Northwest,
Argentina South,
Arizona,
Arkansas,
Bahamas,
Belize,
Bermuda,
Bolivia,
Brazil North,
Brazil Northeast,
Brazil South,
Brazil Southeast,
Brazil West-Central,
British Columbia,
California,
Chile Central,
Chile North,
Chile South,
Colombia,
Colorado,
Connecticut,
Costa Rica,
Cuba,
Delaware,
District of Columbia,
Ecuador,
El Salvador,
Falkland Is.,
Florida,
Galápagos,
Georgia,
Greenland,
Guatemala,
Hawaii,
Honduras,
Idaho,
Illinois,
Indiana,
Iowa,
Kansas,
Kentucky,
Labrador,
Louisiana,
Maine,
Manitoba,
Maryland,
Massachusetts,
Mexico Central,
Mexico Gulf,
Mexico Northeast,
Mexico Northwest,
Mexico Southeast,
Mexico Southwest,
Michigan,
Minnesota,
Mississippi,
Missouri,
Montana,
Nebraska,
Nevada,
New Brunswick,
New Hampshire,
New Jersey,
New Mexico,
New York,
Newfoundland,
Nicaragua,
North Carolina,
North Dakota,
Northwest Territorie,
Nova Scotia,
Ohio,
Oklahoma,
Ontario,
Oregon,
Panamá,
Paraguay,
Pennsylvania,
Peru,
Prince Edward I.,
Québec,
Rhode I.,
Saskatchewan,
South Carolina,
South Dakota,
Tennessee,
Texas,
Uruguay,
Utah,
Venezuela,
Vermont,
Virginia,
Washington,
West Virginia,
Wisconsin,
Wyoming,
Yukon
Introduced into:
Albania,
Austria,
Azores,
Belgium,
Bulgaria,
Buryatiya,
Central European Rus,
China Southeast,
Czechoslovakia,
Dominican Republic,
East Himalaya,
Easter Is.,
Fiji,
France,
Germany,
Great Britain,
Greece,
India,
Iran,
Ireland,
Irkutsk,
Italy,
Japan,
Korea,
Lesser Sunda Is.,
Madagascar,
Malaya,
Mauritius,
Netherlands,
New Caledonia,
New South Wales,
Norfolk Is.,
Northwest European R,
Norway,
Poland,
Primorye,
Puerto Rico,
Queensland,
Romania,
Réunion,
Samoa,
Sardegna,
South Australia,
Spain,
Switzerland,
Tasmania,
Tibet,
Tubuai Is.,
Turkey,
Ukraine,
Yugoslavia