alaska alaskan america american animal animals canada Canadian carcajou carnivore carnivores claws close close-up close-ups closeup closeups eurasian Europe fauna feet finland glutton gulo mammal mammalian mammals mustelid mustelidae mustelids nails nature north norway of predator predators rest resting russia russian scandinavia scandinavian scavenger scavengers siberia siberian States sweden Swedish U.S.A. United up ups us usa western wildlife wolverine wolverines