Photo Date: 
09/02/2018
Bison graze in the haze that sets upon a valley in Wind Cave National Park.
Photo Date: 
09/02/2018
The bison in Wind Cave National Park is one of the most genetically pure herds.
Photo Date: 
09/01/2018
Bulls often venture off onto their own.
Photo Date: 
09/01/2018
A bison grazes in the mid-day sun.
A bull stands among the prairie grasses in Wind Cave National Park as sun sets and a haze falls on the valley.