Region
United States
338
California
195
Colorado
97
North Dakota
84
Oregon
82
Alaska
79
Washington (State)
78
Louisiana
69
Montana
64
Florida
62
Texas
56
North America
45
Nevada
43
Maryland
39
South Dakota
38
Utah
38
Alabama
35
Arkansas
28
Klamath River (Or. and Calif.)
28
Nebraska
28
Hawaii
27
Kansas
27
Virginia
27
Arizona
24
Georgia
23
Maine
23
Massachusetts
22
New York (State)
21
Idaho
20
Chincoteague National Wildlife Refuge (Va. and Md.)
19
Delaware
19
Klamath River Watershed (Or. and Calif.)
18
Minnesota
18
Mississippi
18
Sacramento Valley
18
Bombay Hook National Wildlife Refuge (Del.)
17
North Carolina
17
Wyoming
17
New Jersey
16
Canada
15
Charles M. Russell National Wildlife Refuge (Mont.)
15
Rhode Island
15
Balcones Canyonlands National Wildlife Refuge (Tex.)
14
Blackwater National Wildlife Refuge (Md.)
14
Bombay Hook National Wildlife Refuge
14
Malheur National Wildlife Refuge (Or.)
14
Bear River Migratory Bird Refuge (Utah)
13
New Mexico
13
Ouray National Wildlife Refuge (Utah)
13
Balcones Canyonlands National Wildlife Refuge
12
more ...