Ground squirrels live on or in the ground and not in trees. Gray squirrels, however, sleep in tree nests during the winter and only venture out during the morning and evening. Instead of hibernating, they rely on sheltered nests or dens in trees, fat reserves, and stored food to survive the long, cold winter.

How squirrels keep warm in winter?

Just as they store food underground for use during the winter, squirrels store fat on their bodies in preparation for the cold. When food is scarce, a good layer of fat offers the energy a squirrel might need to survive. It also helps them stay warm when the temperature drops.

Can squirrels freeze to death?

Making it through winter is a tough proposition for a squirrel. If they do not get everything right, or if the temperature drops to an extreme level, then it is possible for a squirrel to freeze to death.