Alan Cressler:
Asclepias verticillata, Cedar Pass Campground, Badlands National Park, Jackson County, South Dakota 1
Alan Cressler:
Asclepias verticillata, Cedar Pass Campground, Badlands National Park, Jackson County, South Dakota 2
Alan Cressler:
Athene cunicularia hypugaea, Triangle Prairie Dog Town, Badlands National Park, Pennington County, South Dakota 1
Alan Cressler:
Badlands and Prairie, Bigfoot Pass Overlook, Badlands National Park, Pennington County, South Dakota 1
Alan Cressler:
Badlands and Prairie, Bigfoot Pass Overlook, Badlands National Park, Pennington County, South Dakota 2
Alan Cressler:
Badlands, Badlands National Park, Jackson County, South Dakota 1
Alan Cressler:
Badlands, Badlands National Park, Jackson County, South Dakota 2
Alan Cressler:
Badlands, Bigfoot Pass Overlook, Badlands National Park, Pennington County, South Dakota 1
Alan Cressler:
Badlands, Cornata Basin, Cornata Basin Overlook, Badlands National Park, Pennington County, South Dakota 1
Alan Cressler:
Badlands, Cornata Basin, Cornata Basin Overlook, Badlands National Park, Pennington County, South Dakota 2
Alan Cressler:
Badlands, Cornata Basin, Cornata Basin Overlook, Badlands National Park, Pennington County, South Dakota 3
Alan Cressler:
Badlands, Cornata Basin, Cornata Basin Overlook, Badlands National Park, Pennington County, South Dakota 4
Alan Cressler:
Badlands, Geology Exibit, Badlands National Park, Jackson County, South Dakota 1
Alan Cressler:
Badlands, White River Overlook, Badlands National Park, Pennington County, South Dakota 1
Alan Cressler:
Badlands, White River Overlook, Badlands National Park, Pennington County, South Dakota 1
Alan Cressler:
Badlands, White River Overlook, Badlands National Park, Pennington County, South Dakota 2
Alan Cressler:
Cynomys ludovicianus, Robert's Prairie Dog Town, Badlands National Park, Pennington County, South Dakota 1
Alan Cressler:
Cynomys ludovicianus, Robert's Prairie Dog Town, Badlands National Park, Pennington County, South Dakota 2
Alan Cressler:
Cynomys ludovicianus, Robert's Prairie Dog Town, Badlands National Park, Pennington County, South Dakota 3
Alan Cressler:
Danaus plexippus, Cedar Pass Campground, Badlands National Park, Jackson County, South Dakota 1
Alan Cressler:
Dry Waterfall Canyon, Notch Trail, Badlands National Park, Jackson County, South Dakota 1
Alan Cressler:
Euphorbia marginata, Cedar Pass Campground, Badlands National Park, Jackson County, South Dakota 1
Alan Cressler:
Euphorbia marginata, Cedar Pass Campground, Badlands National Park, Jackson County, South Dakota 2
Alan Cressler:
Euphorbia marginata, Cedar Pass Campground, Badlands National Park, Jackson County, South Dakota 3
Alan Cressler:
Notch Trail, Badlands National Park, Jackson County, South Dakota 1
Alan Cressler:
Notch Trail, Badlands National Park, Jackson County, South Dakota 2
Alan Cressler:
Notch Trail, Badlands National Park, Jackson County, South Dakota 3
Alan Cressler:
Prairie, Asclepias verticillata, Castle Butte, Badlands National Park, Pennington County, South Dakota 1
Alan Cressler:
Russell McLester, Badlands, Geology Exibit, Badlands National Park, Jackson County, South Dakota 1
Alan Cressler:
Russell McLester, Badlands, Geology Exibit, Badlands National Park, Jackson County, South Dakota 2
