Region
United States
456
Alabama
17
Muscle Shoals
7
Canada
3
New Mexico
3
Utah
3
Bear River Migratory Bird Refuge (Utah)
2
India
2
Mississippi River Valley
2
Pennsylvania
2
Southern States
2
Superior National Forest (Minn.)
2
Tennessee River Valley
2
Tennessee Valley (Tex.)
2
Texas
2
Alaska
1
Arkansas
1
California
1
Columbia River
1
Cumberland River Valley (Ky. and Tenn.)
1
Florida
1
Gettysburg National Military Park (Pa.)
1
Kentucky
1
Louisiana
1
Malheur National Forest (Or.)
1
Maryland
1
Mexico
1
Minnesota
1
Mississippi
1
Missouri
1
New Jersey
1
New York (State)
1
Orange County
1
Pakistan
1
Tennessee River Watershed
1
Washington (D.C.)
1