Region
United States
41
Southwest, New
8
Southwestern States
8
New Mexico
7
West (U.S.)
7
Arizona
6
Colorado
6
North America
5
Great Plains
4
Rocky Mountains Region
4
Fraser Experimental Forest (Colo.)
3
Wyoming
3
Cimarron National Grassland
2
Fraser Experimental Forest
2
Kansas
2
Madrean Archipelago
2
Mexico, North
2
Rocky Mountains
2
America
1
Bandelier National Monument
1
Bandelier National Monument (N.M.)
1
Bear Lodge Mountains
1
Black Hills (S.D. and Wyo.)
1
Chaco Canyon (N.M.)
1
Cheyenne River Watershed (Wyo. and S.D.)
1
Chimney Rock (Archuleta County, Colo.)
1
Cimarron National Grassland (Kan.)
1
East (U.S.)
1
Glacier Lakes Ecosystem Experiments Site (Wyo.)
1
Holiday Mesa
1
Kaibab National Forest
1
Kaibab National Forest (Ariz.)
1
Medicine Bow National Forest
1
Medicine Bow National Forest (Wyo.)
1
Mexico
1
Montana
1
Rio Grande Watershed (Colo.-Mexico and Tex.)
1
San Juan National Forest
1
San Rafael Valley
1
San Rafael Valley (Ariz.)
1
Santa Rita Experimental Range (Ariz.)
1
Southern States
1
Southwest
1
Squaw Creek
1