a black wolf stands in deep snow, pausing to survey surroundings and make a decision about which way to go. - 國家野牛山區 個照片及圖片檔
the remnants of the herd of bison that were chased by the wolf pack, uses the road to get away from the valley. - 國家野牛山區 個照片及圖片檔狼 - 野狗, 黃石國家公園, 美洲野牛
