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Keywords:Lontra canadensis, National Park, North America, North American, Yellowstone, adult, animals, aquatic, cold, dive, diving, eat, eating, family, fish, fishing, forage, foraging, fur, groom, grooming, ice, lontra, lutra, mammal, mammals, mustelid, northern river otter, otter, otters, river, river otter, roll, rolling, rub, rubbing, semi, semi-aquatic, snow, snowy, swim, swimming, water, white, wildlife, winter, young
