herd of bison grazing on a field with stagnant water after a rain and goegous mountains and trees in the background

america americanbison animal bison bisonherd blue bluesky buffalo bull bullbison country countryside field glaciernationalparkmontana grass grazing green ground herd hornsbull landscape life mammal montana mountains nationalpark nationalparks nature naturelandscape northdakota outdoor park pasture rain rained rural sky southdakota stagnant stagnantwater water wet wild wildlife wildlifeanimals yellowstone yellowstonenationalpark yellowstonepark