You probably spot squirrels all the time and wonder how close they really are to rats or mice. Yep — squirrels are rodents, and honestly, that explains a lot about their teeth, diet, and quirky behavior.
Stick around and you’ll see which squirrel traits come from being a rodent. I’ll talk about how their habits differ from other rodents, and why they fit in the same group as mice and rats.
You’ll get clear examples of their teeth, tails, and food habits so you can spot what makes them stand out.
Is a Squirrel a Rodent?
If you look closely, squirrels share a lot of traits with other rodents. Their scientific place in animal classification actually explains why.
Some big points? Their taxonomic rank, those teeth, and how they’re a bit different from other rodent groups you might know.
Scientific Classification of Squirrels
Squirrels belong to the order Rodentia, the group that includes animals with similar teeth and jaw features. Inside Rodentia, they sit in the family Sciuridae.
That family splits into subfamilies like Sciurinae (tree squirrels and flying squirrels), Xerinae (ground squirrels, marmots, and prairie dogs), and Callosciurinae (lots of tropical tree squirrels).
A typical classification line looks like this: Order: Rodentia → Family: Sciuridae → Subfamily: Sciurinae/Xerinae/Callosciurinae → Genus and species.
So every tree squirrel, flying squirrel, chipmunk, and ground squirrel you see is a rodent species, at least according to science.
You can trace their relationships with fossil records and DNA studies, which group them inside Rodentia.
Why Squirrels Are Considered Rodents
Squirrels have the classic rodent feature: incisors that never stop growing. They need to gnaw constantly to keep these teeth in check.
They use those two upper and two lower front teeth as a chisel, chewing wood, nuts, and all sorts of things to wear them down.
You’ll also notice a gap between their incisors and cheek teeth, called a diastema. Their jaws are built for gnawing, and their digestive and skeletal features match other rodents.
Their diet—nuts, seeds, fruits, and plant matter—lines up with what most rodents eat. These physical and behavioral traits firmly keep squirrels inside Rodentia.
Differences Between Squirrels and Other Rodents
Squirrels might be rodents, but they’re not quite like rats, mice, or guinea pigs. They often have longer hind legs, bushy tails, and strong claws for climbing.
Flying squirrels have a skin flap (a patagium) for gliding, which most other rodents don’t have.
Ground squirrels, marmots, and prairie dogs dig burrows and often live in social groups, which you don’t see as much in tree squirrels.
Chipmunks are smaller and have those distinct stripes. Unlike some rodents that hide out at night, many tree squirrels are busy during the day.
These differences come from their subfamily and species adaptations, but they don’t take away from their basic rodent identity in Sciuridae and Rodentia.
Squirrel Traits, Behaviors, and Impacts
Let’s get into what makes squirrels look and act the way they do. I’ll cover how they feed, store food, which species you might see, and the main ways they can cause property issues or spread disease.
Physical Features and Unique Traits
Squirrels usually have a long, bushy tail that helps with balance and heat control. Tree squirrels like the gray squirrel (Sciurus carolinensis) and red squirrel use their tails as a counterweight when they jump and as a blanket in cold weather.
Flying squirrels and giant flying squirrels have a patagium, a thin skin membrane, so they can glide from tree to tree.
Most squirrels have large eyes set high on their heads, giving them great peripheral vision. Their hind legs are longer than their front legs, which helps them leap and climb quickly.
Sizes range a lot. The African pygmy squirrel and neotropical pygmy squirrel are tiny, while oriental giant squirrels are, well, giant.
Fur color can be gray, red, or dark brown, depending on the species and where they live.
Gnawing Behavior and Continuously Growing Incisors
Squirrels have those sharp incisors that never stop growing—classic rodent move. You’ll notice them gnawing on wood, nuts, and sometimes even your house.
They gnaw to trim their teeth and to get food out of tough shells. You might spot neat, crescent-shaped chew marks on wood or even on attic insulation or wiring if they get inside.
Their nut- and seed-heavy diet encourages a lot of gnawing and hoarding. Sometimes you’ll find half-eaten shells or tiny grooves where flying squirrels stash nuts.
Gnawing can lead to property damage that looks like typical rodent damage, but squirrel chew marks are usually bigger and more obvious.
If you see shredded vents, chewed eaves, or bite marks on wires, there’s a good chance you’ve got squirrels.
Common Squirrel Species and Types
You’re most likely to see tree squirrels, ground squirrels, and flying squirrels. Tree squirrels include the familiar gray squirrel (Sciurus carolinensis), fox squirrel, and red squirrel.
They live in yards and woods, building leaf nests—called dreys—in trees. Ground squirrels dig burrows and often live in colonies.
Flying squirrels, including some giant species, glide at night and nest in tree cavities.
Tiny types include the African pygmy squirrel and neotropical pygmy squirrel, while the oriental giant squirrel is much bigger.
The Sciuridae family also covers chipmunks and marmots. If you watch closely, you’ll notice different behaviors: gray and fox squirrels stash nuts, red squirrels defend their food spots, and flying squirrels are mostly active at night.
Species vary by region, so what you see at your local park or forest depends on where you live.
Squirrel Damage and Health Risks
Squirrels love to chew on wood, wires, vents, and even insulation. They’ll squeeze into attics through eaves and soffits, leaving behind droppings and shredded bits of nesting material.
Their chewing can short out wiring or, in the worst cases, cause fire hazards. Squirrels aren’t like mice or rats—they’re stronger and can rip open bigger holes, so you’ll need a different approach for repairs.
Squirrel infestations bring some real health concerns. Their droppings and urine spread bacteria and parasites, which can cause illnesses like leptospirosis or salmonella.
Sure, hantavirus is usually a mouse or rat thing, but you really don’t want to handle any rodent waste without gloves and a mask. Squirrels also carry ticks and fleas, which might pass diseases to you or your pets.
If you spot squirrel droppings or a nest inside your home, don’t touch it. It’s best to call a wildlife professional instead.
Curious about how squirrels behave or what they eat? Check out this detailed squirrel overview.
