animal animals britain british carnivore carnivores close close-up close-ups closeup closeups ermine erminea european fauna feet foot footprint footprints france french German germany great imprint imprints Kingdom mammal mammalian mammals marten martens mustela mustelid mustelidae mustelids nature pad pads paw paws polecat predator predators print Prints putorius short-tailed snow snowy stoat toe toes trace traces track tracks uk United up ups weasel wildlife winter wintertime