Region
United States
198
California
13
Idaho
13
Southern States
9
Oregon
8
Northeastern States
7
Atlantic Coast (U.S.)
6
Montana
6
Africa
4
Alabama
4
Klamath River (Or. and Calif.)
4
Klamath River Watershed (Or. and Calif.)
4
North America
4
Northwest, Pacific
4
Puerto Rico
4
Atlantic Ocean
3
Central America
3
Florida
3
Georgia
3
Maine, Gulf of
3
North Atlantic Ocean
3
Northwestern States
3
Utah
3
Washington (State)
3
Wyoming
3
Alaska
2
Bering Sea
2
Caribbean Sea
2
Colorado
2
Long Island Sound (N.Y. and Conn.)
2
Mississippi
2
Nevada
2
New York Bight (N.J. and N.Y.)
2
North Pacific Ocean
2
Pacific Coast (U.S.)
2
Scott River Watershed
2
Shasta River
2
Uinta Mountains (Utah and Wyo.)
2
Yellowstone National Park Region
2
Africa, East
1
Antarctica
1
Appalachian Region
1
Arizona
1
Arkansas
1
Bahamas
1
Beaufort Sea
1
Belize
1
Bisti Wilderness Area
1
Bisti Wilderness Area (N.M.)
1
Block Island Sound
1
more ...