Otter tracks in hydrothermally heated mud next to %22frost flowers%22 at the edge of the Yellowstone River. %22The tracks are at the end of an otter slide down a snow slope that leads up to where an otter has eaten several fish leaving only shards of skin%2C the coarser bones%2C and a nearby midden of urine and scat%2C%22 Fuller says
Otter tracks in hydrothermally heated mud next to %22frost flowers%22 at the edge of the Yellowstone River. %22The tracks are at the end of an otter slide down a snow slope that leads up to where an otter has eaten several fish leaving only shards of skin%2C the coarser bones%2C and a nearby midden of urine and scat%2C%22 Fuller says