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.