C. gouldii is active year-round across most of its range, but enters hibernation in cooler climates.

To survive the winter, they are at their maximum weight shortly before entering hibernation.

The Ice Age forces them to enter hibernation beneath the surface of the planet when it begins.

Before entering hibernation, animals need to store enough energy to last the entire winter.

Upon hatching, the larvae immediately enter hibernation, and only feed the following spring when the fresh growth occurs.

Females immediately enter hibernation, while males may remain active for a few more weeks.

Males use this extra time before entering hibernation to replenish fat reserves used during breeding.

A cold-tolerant bat, it enters hibernation later than other species, usually late November or early December.

Upon resumption, the computer is exactly as it was upon entering hibernation.

Some mice do not enter hibernation, but move to nearby peoples' houses to live inside the walls, in old furniture, or cabinets.