You can spot different squirrels by watching their size, color, tail shape, and where they live. If you pay attention to whether a squirrel sticks to the ground, dashes up trees, or comes out at night, you’ll pick up on some big clues.
Look for things like body size, fur color, tail shape, and behavior—do they climb, dig, or move at night? These details help you quickly figure out what kind of squirrel you’re seeing.
Watch how a squirrel moves and where it forages. That’ll tell you a lot about its species, and maybe even help you guess its sex later.
The next sections break down the main traits to check, ways to compare species, and the little signs that help you tell males from females.
How to Tell the Difference Between Squirrel Species
You can tell squirrels apart by checking their size, tail shape, fur color, ear details, and where they hang out. Watch their behavior and note their habitat—those details usually back up what you see.
Key Physical Features of Common Squirrel Types
First, check out their size, tail, and ears. Tree squirrels have long, bushy tails that help them balance when they leap.
Ground squirrels look stockier, with shorter, thinner tails and shorter legs built for digging. Flying squirrels are smaller and have wide membranes (patagia) between their front and back legs. You might notice the loose skin when they glide.
Fur color helps, but it can change depending on where you are. Eastern gray squirrels show gray mixed with brown.
Fox squirrels look bigger and have more reddish-brown fur. Take a look at eye rings and ear tufts—Abert’s squirrels, for example, sport ear tufts in winter.
Teeth and claws don’t really help much, so stick to tail, body shape, and any standout markings.
Identifying Tree Squirrels, Ground Squirrels, and Flying Squirrels
You’ll spot tree squirrels in branches, nesting in tree cavities or leaf dreys. They scamper, leap, and use their tails for balance.
Ground squirrels stay close to their burrows and mostly run on the ground. They’ll often stand upright to check for danger.
Flying squirrels are nocturnal and glide from tree to tree. You might see them at dusk, or just notice the flattened glide marks on tree trunks.
Compare what they do: tree squirrels raid bird feeders and climb trunks. Ground squirrels dig burrows and hang out in open fields.
Flying squirrels prefer dense forests and keep quiet during the day. Habitat gives you a big hint—look for burrow holes and ground runways for ground squirrels, nests in forks for tree squirrels, and old tree cavities for flying squirrels.
Spotting Eastern Gray, Fox, and Other Notable Squirrels
Eastern gray squirrels are medium-sized, with bushy gray tails and white bellies. You’ll find them in towns and backyards, and they’re active during the day.
Fox squirrels appear larger, with reddish-brown fur and a longer body. They like open woodlands and forest edges.
Other notable types include American red squirrels (smaller, reddish with white bellies), Douglas squirrels (small with chestnut-orange sides in the Pacific Northwest), and western gray squirrels (bigger, with silvery-gray fur).
Try this quick checklist:
- Size: small / medium / large
- Tail: bushy long / thin short / gliding membrane
- Color: gray / red-brown / silver
- Habitat: urban trees / open woods / burrows / dense forest
If you use two or three of these clues together, you’ll usually figure out the species.
How to Tell the Difference Between Male and Female Squirrels
You can spot differences if you look closely at body size, genital placement, and behavior during mating season. Watch for swollen scrotums or visible teats, and pay attention to who cares for young or chases others.
Physical Differences: Size, Color, and Anatomy
Size doesn’t usually give a clear answer. In most tree squirrels, males and females look about the same, and any size difference is pretty minor.
Color won’t help much either. Coat shades and patterns usually match between males and females.
Focus on anatomy instead. Males have a penis and scrotum, while females have a vulva and teats.
During breeding season, you might notice the male’s scrotum swell and become easier to spot. Females’ nipples swell when they’re nursing.
If you can safely see under the tail, check genital spacing. The female’s vulva sits right next to the anus, while the male’s penis and scrotum are set farther apart.
It’s best to use binoculars or photos—don’t try to handle wild squirrels.
Behavioral Clues to Determine Squirrel Gender
Behavior can give you hints when you can’t see anatomy clearly. Male squirrels tend to act bolder and roam more during mating season.
You might spot males chasing each other or chasing a female. That chase-and-mount pattern is a strong sign the chaser’s a male.
Females usually guard nests and stay near their young. If you find a den with nursing babies, the adult you see nearby is almost always female.
Sometimes, females share nests and groom each other more than males do.
Listen for scent and calls, too. Females in heat might give off scents that attract mates, and males may fight more or show off for dominance.
Try to watch a few times—one quick look rarely tells you everything.
Tips for Identifying Squirrel Sex in the Wild
Start with the basics: grab your binoculars, maybe a camera, and try to watch from a distance. Timing helps too—spring and late summer are usually when squirrels get busy, so you might spot more clues around then.
If you spot a male, you might notice a swollen scrotum. Females sometimes have visible teats, especially during the breeding season. Honestly, it’s not always obvious, so compare what you see over a few days—patterns in behavior can give away more than a single glance ever will.
Stay safe. Please don’t try to catch or handle wild squirrels just to peek at their anatomy. Instead, use a spotting scope or a zoom lens. Got a feeder nearby? Watch which squirrels show up with little ones. Nine times out of ten, the caregiver’s the mom.
Here’s a quick checklist:
- Binoculars or a zoom camera? Absolutely.
- Checking under the tail for genital spacing? Only if you can do it safely.
- Spotting chases or fights? Probably the males.
- Seeing nest-guarding or nursing? That’s likely a female.
Want more details about visual signs and squirrel behavior? Check out this guide: how to tell a squirrel’s sex in the field.
