Region
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Iran
6
Middle East
6
Sweden
6
Washington (State)
6
Bermuda Islands
5
Caribbean Area
5
Chicago
5
Gombe Stream National Park
5
Middle West
5
Minnesota
5
New Mexico
5
North Carolina
5
Northern Ireland
5
Ohio
5
Okinawa-ken
5
Poland
5
Toronto
5
Tropics
5
Wales
5
Amboseli National Park
4
America
4
Argentina
4
Arizona
4
Boston
4
Caribbean Sea
4
Central America
4
Costa Rica
4
Côte d'Ivoire
4
Denali National Park and Preserve
4
Denali National Park and Preserve (Alaska)
4
Denmark
4
Egypt
4
Ethiopia
4
Europe, Eastern
4
Germany (West)
4
Ghana
4
Hong Kong
4
Iraq
4
Mediterranean Region
4
Mediterranean Sea
4
Mexico City
4
New Zealand
4
Parc national de Taï
4
Paris
4
Philadelphia
4
Puerto Rico
4
Russia (Federation)
4
San Francisco
4
San Francisco Bay Area
4
Soviet Union
4
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