Glacier National Park, Hoary Marmots, Marmota caligata, Montana, North America, Northern Rockies, Western U.S., alpine, animal, animals, fauna, hoary marmot, mammal, mammals, marmot, marmots, mountain, mountains, rodent, rodents, subalpine, wildlife, play, playing, wrestle, wrestling, fight, fighting, baby, babies, young, pup, pups, behavior, horizontal, photos, photo, photograph, photographs, image, images, picture, pictures, stock, of, agency