Region
Louisiana
3
United States
3
Great Lakes (North America)
2
Alabama
1
Assateague Island (Md. and Va.)
1
Carthage
1
Chesapeake Bay (Md. and Va.)
1
Colorado
1
Everglades
1
Florida
1
Kansas
1
Maine
1
Malheur National Wildlife Refuge
1
Malheur National Wildlife Refuge (Or.)
1
Mississippi
1
Northwest, Pacific
1
Oregon
1
Rocky Mountains Region
1
Stubblefield Lookout Tower Site (Or.)
1
Texas
1
West (U.S.)
1