A bull Elk (Cervus canadensis) surveys his surroundings during the autumn rut in Rocky Mountain National Park, Colorado. His impressive antlers, shed and regrown annually, signify his health and dominance to potential mates and rivals.
A lone American bison (Bison bison) is silhouetted against a fiery sunset in Badlands National Park, South Dakota. As North America's largest land mammal, these iconic animals are a keystone species, shaping the prairie ecosystem as they roam the vast, mixed-grass prairies of the American West.
A herd of American Bison (Bison bison) grazes across the mixed-grass prairie of Badlands National Park, South Dakota, as sunset illuminates the dramatic clouds. One bison kicks up dust, a common behavior before taking a dust bath to deter insects. This timeless scene captures the wild spirit of the American West.
