* Squirrels: Squirrels are small, rodents that are found in North America, Europe, and Asia. They are omnivores, but they primarily eat nuts, seeds, and fruits. Squirrels will often cache food for the winter months, when food is scarce. They will also go into a state of torpor during the winter, although not as deep as hedgehogs.
* Chipmunks: Chipmunks are small, rodents that are found in North America and Asia. They are omnivores, but they primarily eat nuts, seeds, and fruits. Chipmunks will often cache food for the winter months, when food is scarce. They will also go into a state of torpor during the winter, although not as deep as hedgehogs or squirrels.
* Groundhogs: Groundhogs are large, rodents that are found in North America. They are herbivores, and they primarily eat grasses and other vegetation. Groundhogs will often go into a state of hibernation during the winter months, when food is scarce. During hibernation, their body temperature drops and their metabolism slows down, allowing them to survive on very little food.
* Bats: Bats are small, flying mammals that are found all over the world. They are insectivores, and they primarily eat insects. Bats will often go into a state of torpor during the winter months, when insects are scarce. During torpor, their body temperature drops and their metabolism slows down, allowing them to survive on very little food.