The Shrew is a tiny mole-like creature found mostly in New Guinea, Australia and New Zealand. It handles winter and the colder months much differently than most animals. While most animals resort to retreating and going into hibernation to conserve energy, the shrew will shrink its head by as much as 20%. The Shrew can actually break down the cranial bones and brain and regrow them in spring. The process is thought to help the animal use less energy while providing nutrition since the breakdown is reabsorbed into the body.