Tatzlwyrms hibernate in cold weather, and when they feel winter approaching they seek out underground lairs, mountain crevices, or even hay lofts. On one notable occasion, townsfolk reported being briefly overrun by tatzlwyrms after a conflict between spellcasters in the nearby hills caused a sudden blizzard. Local scholars still debate whether the cause of the influx was the sudden change in weather or if the creatures were drawn to one of the other magic users staying in town who were part of the same pilgrimage as those doing battle.