Ever spot a squirrel darting across your yard and wonder where it disappears at night? Squirrels sleep in all kinds of places, and it really depends on their type.
Tree squirrels curl up in messy-looking nests made of leaves and twigs, or they tuck themselves into tree hollows. Ground squirrels dig burrows underground. Flying squirrels prefer tree cavities, and sometimes they even share nests to stay warm.
Quick rundown: most tree squirrels sleep in dreys or tree cavities, ground squirrels use burrows, and flying squirrels like hollow trees or communal nests.
Stick around if you want to know how each squirrel builds its sleeping spot or how weather and seasons mess with their habits. Some sleep solo, others pile together for warmth. I’ll also share tips for spotting nests and figuring out what those squirrels are up to in your yard.
Where Do Squirrels Sleep: Comparing Tree, Ground, and Flying Squirrels
Squirrels choose from three main home styles: leafy dreys and tree cavities high up, deep burrows underground, and hollow tree nests that flying squirrels often share. Each spot protects them from weather and hungry predators, depending on their body size, habits, and the local climate.
Tree Squirrels Sleep in Dreys and Tree Cavities
Tree squirrels, like the eastern gray squirrel, build round dreys out of twigs, leaves, and moss. They usually wedge these nests into the fork of a branch.
A drey is about the size of a basketball and lined with softer stuff to keep the squirrel cozy. Sometimes, squirrels move into tree cavities—those hollow spots left behind by rot or woodpeckers—if the weather’s rough or the cavity just feels safer.
You’ll spot dreys high up in big trees, maybe 20–60 feet above the ground. Squirrels switch between dreys and cavities, depending on the season and how safe they feel.
When it gets cold, they spend more time inside and might even share a nest for warmth, at least for a while.
Ground Squirrels Sleep in Underground Burrows
Ground squirrels, like the California ground squirrel, dig complex burrows under the surface. These tunnels have rooms for sleeping, stashing food, and raising babies.
Burrows can run several feet deep and may snake along a slope or under rocks. If you see burrow holes in your yard or out in a field, ground squirrels use them to dodge predators and handle temperature swings.
Some ground squirrels hibernate or go into long torpor in their burrows. They slow their heart rate and cool down for months to save energy.
Flying Squirrels Sleep in Tree Hollows and Communal Nests
Flying squirrels love tree hollows and cavity nests more than open dreys. They fill these spots with soft stuff—shredded bark, moss, even fur—to keep their pups warm.
Since flying squirrels are nocturnal, you’ll have better luck spotting their resting places during the day. In winter, they often share cavities to keep each other warm through freezing nights.
If they can’t find a good cavity, flying squirrels will build dreys in forked branches, but honestly, they’d rather have the deeper shelter of a hollow.
Squirrel Sleeping Patterns and Seasonal Behaviors
Squirrels change up their sleeping spots and routines based on cold, food, and danger. Here’s how they cut back activity in winter, how baby squirrels use their first nests, and when they decide to sleep in groups for extra warmth.
How Squirrels Adjust Sleeping Habits in Winter
In winter, most tree squirrels don’t really hibernate. Instead, they go into short torpor spells to save energy.
During torpor, a squirrel’s heart rate and body temperature drop for a few hours, then they wake up to snack on stored food. You’ll see them use thicker dreys or move into tree cavities for better insulation and wind protection.
Squirrels pile in extra moss, bark, and leaves to trap heat. If food gets scarce, they nap more and cut back on daytime activity.
Ground squirrels and a few other species might hibernate in their burrows for the whole season. It’s worth checking which squirrels live near you, since that tells you if they’re sleeping in trees or underground. For more details, check out Where Do Squirrels Sleep? (https://squirrelsinfo.com/where-do-squirrels-sleep/).
Baby Tree Squirrels and Their First Nests
When a baby tree squirrel is born, it stays tucked in a nest the mother built for warmth and safety. These first nests are usually tree cavities or leaf-and-twig dreys lined with grass, moss, and fur.
The mother visits often to feed and groom the pups. Young squirrels hide out for weeks. Their eyes open at about 3–4 weeks, and they start climbing at 6–8 weeks.
Sometimes, mothers move their babies to new nests if the old one gets too risky or the weather turns bad. If you stumble across a nest with babies, don’t touch them.
Disturbing a nest can push the mother to move or even abandon her pups. For more about baby squirrel care and nest types, see sleeping habit guides for tree squirrels (https://rodentsinfo.com/where-do-squirrels-sleep/).
Social Nesting and Group Sleep During Cold Weather
Squirrels sometimes sleep alone, but they’ll share nests depending on the species and the temperature.
Tree squirrels, for example, will often huddle together in cavities when a cold snap hits. They do this to save heat.
You might spot several adults and juveniles packed into one cavity. It’s kind of adorable, honestly, and it really helps them keep warm.
Social nesting isn’t just about warmth, though. When a group shares a cavity, they can keep an eye out for predators.
If danger shows up, they’re more likely to wake up and react quickly. Still, most tree squirrels prefer their own dreys for daytime naps.
They usually only group up when the nights get seriously chilly. Urban squirrels get creative and use attics or building cavities to make group dens.
Those spots stay warmer and have fewer drafts. Curious about how squirrels tweak their nests in the city? You can check out more on urban sleeping behavior here: (https://slumberhabit.com/squirrel-sleeping-habits/).
