Region
Afghanistan
6
Africa
1
Africa, North
1
Africa, Sub-Saharan
2
Ahmadābād
1
Alaska
1
America
2
Appleton
1
Arab countries
1
Arctic regions
1
Asia
1
Atlanta (Ga.)
1
Australia
7
Balkan Peninsula
1
Belfast
2
Beloit (Wis.)
1
Beloit, Wis
1
Berlin (Germany)
2
Bern (Switzerland : Canton)
1
Bhutan
1
Bosnia and Herzegovina
1
Brazil
1
California
1
Cambodia
3
Canada
26
Caribbean Area
2
Central America
1
Chicago Metropolitan Area
1
Chile
2
China
15
Colombia
4
Colorado River (Colo.-Mexico)
1
Colorado River Watershed (Colo.-Mexico)
1
Connecticut
1
Cuba
3
Developing countries
8
Dubayy (Emirate)
1
East Asia
1
Eastern Shore of Virginia National Wildlife Refuge
1
Egypt
6
England
5
Ethiopia
1
Europe
7
Europe, Central
2
Europe, Western
3
European Economic Community countries
2
European Union countries
22
Fishermans Island National Wildlife Refuge
1
Florida
2
Foreign countries
1
more ...