As a wildlife expert, I have spent considerable time studying the habits and behaviors of various species, including the fascinating creatures known as squirrels. When it comes to the winter season and the snow, the behavior of squirrels can vary greatly depending on the species. Let's delve into the details of how squirrels manage to sleep and survive the harsh winter conditions.

Firstly, it's important to distinguish between the different types of squirrels. There are two main categories: tree squirrels and ground squirrels. While both types have unique adaptations to the cold, their sleeping habits during winter are notably different.

Ground Squirrels
Ground squirrels are known for their hibernation-like state, which is often referred to as "true hibernation." During this period, their metabolic rate significantly decreases, and their body temperature drops close to that of the surrounding environment. This state of dormancy allows them to conserve energy when food is scarce.

In preparation for winter, ground squirrels will often dig burrows that can extend several feet underground. These burrows are not only their sleeping quarters but also serve as a safe haven from predators. The burrows are lined with grasses and leaves to provide insulation and a comfortable place to rest. When the snow falls, the squirrels are already tucked away in their underground homes, where the temperature is more stable and significantly warmer than the surface.

During their long seasonal sleep, the heart rate and breathing of ground squirrels slow down drastically. They may only wake up for short periods, approximately 12 to 20 hours per week, to feed on stored food and possibly to drink water. This minimal activity helps them to conserve energy for the long winter months.

Tree Squirrels
On the other hand, tree squirrels do not hibernate. They are more active during the winter months and have different strategies for staying warm and safe. Instead of burrowing underground, tree squirrels rely on their agility and speed to find food and avoid predators.

To prepare for the winter, tree squirrels will gather and store large amounts of food, such as nuts and seeds, in various locations around their territory. This allows them to have access to food sources even when the snow is deep. They also build nests, known as dreys, which are made from twigs, leaves, and other materials. These dreys are designed to be warm and durable, providing a comfortable shelter from the cold.

Tree squirrels will sleep in their dreys, which are often located high in trees and away from the ground. The height and insulation of the dreys help to protect them from the cold and from predators. While they may not hibernate, tree squirrels do reduce their activity levels during the coldest months, conserving energy and relying on their stored food.

In conclusion, the sleeping habits of squirrels during winter are a testament to their remarkable adaptations to survive in various environments. Ground squirrels retreat underground and enter a state of hibernation, while tree squirrels remain active and rely on their nests for shelter. Both strategies are effective in helping these small mammals endure the challenges of the winter season.

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Their heart rate and breathing slows during this long seasonal sleep, and they typically only wake for 12 to 20 hours per week. However, unlike ground squirrels, tree squirrels don't hibernate. They typically build extremely warm, durable dens to last them through cold winters.Mar 5, 2018read more >>