Apparently the itch of its teething impels it to snap its jaws at anything in front of it. (Chewtle)
It eats snow that piles up on the ground. The more snow it eats, the bigger and more impressive the spikes on its back grow. (Snom)
It shows no mercy to any who desecrate fields and mountains. It will fly around on its icy wings, causing a blizzard to chase offenders away. (Frosmoth)