Region
United States
328
California
51
North America
48
Alaska
21
Canada
16
Atlantic Coast (U.S.)
15
Klamath River (Or. and Calif.)
13
Montana
13
North Dakota
13
Oregon
12
Scott River Watershed
10
Japan
9
Klamath River Watershed (Or. and Calif.)
9
Washington (State)
9
Utah
8
West (U.S.)
8
Florida
7
Michigan, Lake
7
New York (State)
7
Prairie Pothole Region
7
Colorado
6
Klamath River
6
États-Unis
5
Mexico
5
Mississippi River Watershed
5
Missouri
5
Pacific Coast (U.S.)
5
Salmon River
5
Ah Pah Creek Watershed (Calif.)
4
Gulf Coast (U.S.)
4
Klamath River Watershed
4
Maine
4
Michigan
4
Minnesota
4
New Jersey
4
Ouray National Wildlife Refuge (Utah)
4
Pennsylvania
4
Seney National Wildlife Refuge
4
Seney National Wildlife Refuge (Mich.)
4
Shasta River
4
South Dakota
4
Arizona
3
Atlantic Ocean
3
Beaverhead National Forest
3
Box Elder County
3
Browns Park National Wildlife Refuge (Colo.)
3
Caribbean Sea
3
Central America
3
Chesapeake Bay (Md. and Va.)
3
Guatemala
3
more ...