Region
California
21
Nevada
13
Oregon
13
Alaska
8
Arizona
7
Louisiana
7
United States
7
Colorado
6
Washington (State)
6
Great Plains
5
Idaho
5
Montana
5
West (U.S.)
4
Columbia River
3
Florida
3
Kansas
3
Klamath Basin
3
Klamath River (Or. and Calif.)
3
Minnesota
3
Upper Klamath Lake
3
Chincoteague National Wildlife Refuge (Va. and Md.)
2
Churchill County
2
Delta Region
2
Dismal Swamp (N.C. and Va.)
2
Klamath River Watershed (Or. and Calif.)
2
Lacassine National Wildlife Refuge
2
Maine
2
Mexico
2
Mississippi River Delta
2
New Jersey
2
New Mexico
2
North America
2
North Dakota
2
Owyhee County
2
Priest Rapids Reservoir (Wash.)
2
Salton Sea
2
Salton Sea (Calif.)
2
South Dakota
2
Texas
2
Utah
2
Wapato Lake National Wildlife Refuge
2
Wyoming
2
Agassiz National Wildlife Refuge
1
Agassiz National Wildlife Refuge (Minn.)
1
Alamosa National Wildlife Refuge (Colo.)
1
Altamont Pass
1
American Falls
1
American Falls Reservoir (Idaho)
1
Anaho Island National Wildlife Refuge
1
Appalachian Region, Southern
1
more ...