Region
United States
81
Florida
40
California
33
Everglades
17
Columbia River Watershed
13
Everglades (Fla.)
12
Washington (State)
10
Great Lakes (North America)
9
Oregon
9
Rocky Mountains
8
Salton Sea
8
Alaska
7
Gulf Coast (U.S.)
7
Long Island Sound (N.Y. and Conn.)
7
Yellowstone National Park
7
Salton Sea (Calif.)
6
San Francisco Bay Area
6
San Francisco Bay Area (Calif.)
6
West (U.S.)
6
Everglades National Park
5
Everglades National Park (Fla.)
5
Caribbean Area
4
Colorado
4
Himalaya Mountains Region
4
Nevada
4
Northwest, Pacific
4
Yellowstone National Park Region
4
Alabama
3
Arizona
3
Borgne, Lake
3
Borgne, Lake (La.)
3
Canada
3
Colorado River (Colo.-Mexico)
3
Dauphin Island
3
Delta Region
3
Glen Canyon Dam (Ariz.)
3
Indian Ocean Region
3
Louisiana
3
Mississippi River-Gulf Outlet Canal
3
Mississippi River-Gulf Outlet Canal (La.)
3
Wyoming
3
Alaska, Southwest
2
Arkansas
2
Atlantic Coast (South Atlantic States)
2
Australia
2
Bangladesh
2
Bering Sea
2
Blue Ridge Mountains
2
Chesapeake Bay (Md. and Va.)
2
Colorado Plateau
2
more ...