outdoor view of herd of bison grazing on a field with mountains and trees in the background

agriculture america americanbison animal bison bisonhead bisonherd blue buffalo bull bullbison country countryside farm farming field glaciernationalparkmontana grass grazing green herd horns hornsbull landscape livestock mammal meadow montana mountains nationalpark nationalparks nature naturebackground naturelandscape northdakota outdoor park pasture plains rural sky southdakota wild wildlife wildlifeanimals wildlifebackground wildlifephotography yellowstone yellowstonenationalpark yellowstonepark