system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What happens to wildlife in a blizzard?

Animals that do not hibernate, like deer: how do they cope with 2-3' of snow, and drifts?
gpt
More deer do die during really bad winter conditions, but it's surprising how ridiculously tough they are. During the end of fall they undergo a number of bodily and behavior changes: they eat way more food to pack on insulating layers of fat, they shed their summer coats and grow a winter hide of hollow fur that traps air and insulates them further. During particularly bad weather they actively seek out shelter and herds/family groups conserve energy by not moving much. Like two thirds of their time or more is just spent bedded down sleeping.

Smaller mammals tend to go underground in the winter.