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Wiktionary
chionophile

n. any animal that thrives in winter conditions, especially one that thrives in snow

Wikipedia
Chionophile

Chionophiles are any organisms ( animals, plants, fungi, etc.) that can thrive in cold winter conditions (the word is derived from the Greek word chion meaning " snow", and -phile meaning "lover"). These animals have specialized adaptations that help them survive the harshest winters.