You probably spot squirrels all the time, but do you actually know what makes them tick? Let’s dig into what a squirrel is, how it survives, and some of the wild tricks it uses to find food and stay safe.
Watch how this little animal with a bushy tail can totally change the plants and trees around your neighborhood.
You’ll discover their favorite snacks, sneaky hiding moves, and the skills that help them thrive in both cities and forests.
Keep reading for some neat facts about their bodies, behavior, and why they matter to the places you walk and play.
Do You Know Squirrel: What Makes a Squirrel?
Squirrels are small or medium-sized rodents with sharp front teeth, a bushy tail, and strong legs for climbing or digging.
You’ll find them in trees, running along the ground, and even gliding between branches all over the world.
The Definition of a Squirrel
A squirrel belongs to the family Sciuridae in the order Rodentia.
You can spot a squirrel by its big front teeth that never stop growing, a long tail it uses for balance or signaling, and quick limbs made for climbing or digging.
Most tree squirrels have long back legs and sharp claws to grip bark.
Ground squirrels have stronger front legs for digging burrows.
You’ll see them caching nuts, foraging for seeds and fruit, and making sharp calls when predators show up.
Gray squirrels (Sciurus carolinensis) hang out in city parks, red squirrels live in certain forests, and tiny African pygmy squirrels zip along branches.
Some species munch on insects or small animals, but most stick to seeds, nuts, and plants.
The Sciuridae Family Overview
The Sciuridae family includes tree squirrels, ground squirrels, chipmunks, marmots, prairie dogs, and flying squirrels.
Scientists count about 270–285 species worldwide, spread across 50–60 genera.
You’ll hear names like Sciurus (tree squirrels), Tamiasciurus (pine or red squirrels), and Ratufa (giant squirrels from Asia).
Tree squirrels usually build nests or use tree holes and spend most of their time climbing.
Ground squirrels, marmots, and prairie dogs dig burrows and often live in groups.
Flying squirrels don’t actually fly—they glide using a stretchy membrane called a patagium.
They move between trees at night and rarely come out during the day.
Most Common and Unique Squirrel Species
In North America, you’ll spot the eastern gray squirrel (Sciurus carolinensis) and the fox squirrel most often.
Gray squirrels do well in both cities and woods, and sometimes push out red squirrels when they share the same area.
Some unusual or tiny species include the African pygmy squirrel and other pygmy squirrels living in tropical forests.
Marmots like the alpine marmot are bigger, hibernate, and stick to mountain meadows.
Chipmunks are smaller, striped ground squirrels with cheek pouches for carrying food.
Prairie dogs build huge colonies and talk to each other with a bunch of different calls.
Flying squirrels stand out for their gliding tricks and their nighttime habits.
If you want more details about tree, ground, or flying squirrels, check out the Britannica overview of the squirrel family and its habits.
Amazing Squirrel Abilities, Diet, and Survival
Squirrels get pretty creative when it comes to finding food, staying safe, and raising their young.
You can check out what they eat, how they hide food, and which body parts help them climb or dodge predators.
Feeding Habits and Favorite Foods
You’ll often catch squirrels munching on nuts and seeds—acorns, walnuts, sunflower seeds, you name it.
They also eat buds, fruit, fungi, and sometimes bird eggs or insects when they’re desperate.
Their sharp front teeth never stop growing, so chewing on hard nuts keeps them in check.
Squirrels help spread seeds by moving and burying nuts, which lets some trees pop up farther from the parent.
You might spot them picking moist, oily nuts in the fall to build up fat for winter.
In towns, they’ll raid bird feeders and even dig through garbage, which changes what they eat.
Smart Behaviors: Memory, Caching, and Deception
Watch a squirrel for a while and you’ll probably see it burying nuts all over the place—this is called scatter hoarding.
They use memory and smell to dig up their hidden snacks months later.
Studies suggest they remember landmarks and can even find food under snow.
When other squirrels or birds are watching, they sometimes fake out the competition by pretending to bury a nut or moving it over and over to throw off thieves.
Mothers show their babies where to stash food and how to watch for danger.
These clever moves help squirrels survive tough times and keep their populations healthy.
Squirrel Anatomy and Defenses
Squirrels really have bodies built for their wild lives. With sharp claws and those weirdly flexible ankles, you’ll often spot them climbing down trees headfirst, which is honestly kind of impressive.
Their bushy tails do more than look cute—they help squirrels stay balanced, keep them warm in their dreys (which are basically nests), and even signal danger to other squirrels.
Flying squirrels? They take things up a notch. They stretch out a skin flap, called a patagium, between their wrists and ankles to glide from tree to tree.
Ground squirrels and tree squirrels count on quick, zigzag running and powerful teeth to dodge predators.
Baby squirrels, known as kittens or pups, stick to the dreys until they’re ready to climb and find food by themselves.
