Keith Olstad:
American Bison; Badlands National Park, South Dakota 9902
Keith Olstad:
American Bison; Badlands National Park, South Dakota 9908
Keith Olstad:
Black-tailed Prairie Dog; Badlands National Park, South Dakota 9905
Keith Olstad:
Black-tailed Prairie Dog; Badlands National Park, South Dakota 9910
Keith Olstad:
Badlands National Park, South Dakota 9911
Keith Olstad:
Badlands National Park, South Dakota 9913
Keith Olstad:
Badlands National Park, South Dakota 9914
Keith Olstad:
Bighorn Sheep, ram; Badlands National Park, South Dakota 9917
Keith Olstad:
Bighorn Sheep, ram; Badlands National Park, South Dakota 9928
Keith Olstad:
Badlands National Park, South Dakota 9929
Keith Olstad:
Badlands National Park, South Dakota 9930
Keith Olstad:
Badlands National Park, South Dakota 9932
Keith Olstad:
Badlands National Park, South Dakota 9933
Keith Olstad:
Badlands National Park, South Dakota 9934
Keith Olstad:
Badlands National Park, South Dakota 9942