Bison (bison bison) grazing at sunset, Grasslands National Park, Saskatchewan, Canada

prairie field horizon vast weather outdoors sunset dusk tranquil expanse pink hills eating prairies glowing bison skies vastness dramatic side view bison bison animals cloud wide open spaces outside grass nobody rural clouds landscape storm hill national parks national park grazing one animal color image american bison animals in the wild expansive no one no people grasslands national park