Region
United States
7
Arizona
2
Cave Creek Canyon (Ariz.)
2
Yellowstone National Park
2
Big Thicket National Preserve (Tex.)
1
Bisti/De-Na-Zin Wilderness (N.M.)
1
Colorado
1
Columbia River
1
Everglades National Park
1
Everglades National Park (Fla.)
1
Florida
1
Fossil Forest Research Natural Area (N.M.)
1
Idaho
1
Iowa
1
Loess Hills (Iowa and Mo.)
1
Michigan
1
Minnesota
1
Morley Nelson Snake River Birds of Prey National Conservation Area (Idaho)
1
New Mexico
1
Northeastern States
1
Old Faithful Geyser (Wyo.)
1
Rocky Mountain National Park
1
Rocky Mountain National Park (Colo.)
1
Saint George
1
Saint George Region
1
Texas
1
Utah
1
Washington (State)
1