Its breathing and heartrate slow as well. Raccoons do not hibernate, but may have periods of inactivity during the winter. They may stay denned up during a deep snow and their fat reserves will sustain them for a short time. If it is a warm sunny day, they may climb high into a tree, rest, and take in the warm sunshine. They may use a den that was previously occupied by a skunk or an opossum.
Insects have several ways of defeating the cold.
Some insects have mastered supercooling the water in their cells and blood. They remain absolutely motionless and the liquid in their body slows slowly and carefully. Therefore, it does not start the crystallization process that promotes freezing. However, it you were to touch or move a supercooled insect, it might instantly freeze solid. Other insects synthesize and concentrate an antifreeze called glycerol, which lowers the freezing point of water.