Chionophile
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Animals that thrive in winter are called chionophiles (from the Greek chion meaning snow, and -phile meaning lover".
Animals such as caribou, arctic foxes, snowshoe hares and willow ptarmigan all survive the harsh Arctic winters quite easily and some, like the willow ptarmigan, are only found in the Arctic region. These animals have specialized adaptations that help them survive the harshest winters.