Region
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Andes Region
48
Oman
48
Arctic National Wildlife Refuge (Alaska)
47
Italy
46
Poland
46
Arab countries
45
Virginia
45
El Salvador
44
Mexico, Gulf of
44
Africa, North
42
East China Sea
42
Pennsylvania
42
Palestinian National Authority
40
Spain
40
Georgia (Republic)
39
West (U.S.)
39
Liberia
37
New Zealand
37
Somalia
37
Gaza Strip
36
Louisiana
35
Uganda
35
Zimbabwe
35
Bolivia
34
Cambodia
34
Morocco
34
Ghana
33
Great Lakes (North America)
33
Ecuador
32
Guatemala
32
Sweden
32
Arctic National Wildlife Refuge
31
Northern Ireland
31
Southern States
31
Colorado River Watershed (Colo.-Mexico)
30
Serbia
30
Guam
29
Illinois
29
Kyrgyzstan
29
Netherlands
29
Vietnam (Republic)
28
Algeria
27
Bangladesh
27
Uzbekistan
27
Belarus
26
Naval Station Mayport (Fla.)
26
Persian Gulf Region
26
Sri Lanka
26
Ethiopia
25
Everglades
25
more ...