bison on the grasslands, custer state park, infrared

america american animal animals autumn background bison bovine buffalo bull bulls country cow cows custer drive east equestrian equine farm field grass grassland grasslands grazing herd herding hill hooves horns horse infrared livestock national natural nature outdoor park pasture prairie ranch rancher range ride rider rodeo rope roping round roundup rural saddle shade shadow shadows state stock sun tree trees usa valley west western wild