beautiful outdor view of two beautiful bisons grazing on a field with mountains and trees in the background

america americanbison animal bison blue bluesky buffalo bull bullbison country countryside field grass grazing green greengrass herd landscape mammal montana mountains nationalpark nationalparks nature naturelandscape northdakota outdoor park pasture rural sky southdakota two twobisons wild wildlife wildlifeanimals yellowstone yellowstonenationalpark yellowstonepark