7 Types of Squirrels in Pennsylvania

Yes, Pennsylvania hosts squirrels year-round, and the key to spotting different species is matching habitat type, time of day, and seasonal activity. The state's three common tree squirrels are the eastern gray, fox squirrel, and red squirrel, plus the nocturnal southern flying squirrel. Start by understanding what habitat each species prefers, then use the state wildlife hub and animal facts page to narrow your first location based on recent conditions and access. A short outing with one clear viewing plan, focused on the right time window and the most useful ID markers, often succeeds better than rushing through too much ground.

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By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 2, 2026.

7
species recorded
May, April, September
peak months

Verified species, source iNaturalist

7 types of squirrels recorded in Pennsylvania

7 squirrel species have a verified observation record in Pennsylvania across the squirrel family (Sciuridae), each with at least 10 confirmed sightings. The full list, ranked by how often each is recorded, is below.

  • Eastern Gray Squirrel (Sciurus carolinensis), a species recorded in Pennsylvania1

    Eastern Gray Squirrel

    Sciurus carolinensis

    13,934 records
  • Eastern Chipmunk (Tamias striatus), a species recorded in Pennsylvania2

    Eastern Chipmunk

    Tamias striatus

    5,886 records

    Public domain CC0

    Wikipedia
  • Groundhog (Marmota monax), a species recorded in Pennsylvania3

    Groundhog

    Marmota monax

    4,652 records

    Thomas Koffel CC BY

    Wikipedia
  • American Red Squirrel (Tamiasciurus hudsonicus), a species recorded in Pennsylvania4

    American Red Squirrel

    Tamiasciurus hudsonicus

    1,587 records

    oksanaetal CC BY

    Wikipedia
  • Eastern Fox Squirrel (Sciurus niger), a species recorded in Pennsylvania5

    Eastern Fox Squirrel

    Sciurus niger

    1,094 recordsNative

    davis0117 CC BY

    Wikipedia
  • Southern Flying Squirrel (Glaucomys volans), a species recorded in Pennsylvania6

    Southern Flying Squirrel

    Glaucomys volans

    306 records

    Hila Taylor CC BY

    Wikipedia
  • Northern Flying Squirrel (Glaucomys sabrinus), a species recorded in Pennsylvania7

    Northern Flying Squirrel

    Glaucomys sabrinus

    20 recordsNative

    Evan M. Raskin CC BY

    Wikipedia

Counts from verified iNaturalist observations. Photos by iNaturalist observers, reused under the licence each observer chose.

Real sighting data, source iNaturalist

27,430 verified observations on iNaturalist of squirrel have been recorded in Pennsylvania, most often in May, April, September.

When squirrel are recorded in Pennsylvania

Yes, Pennsylvania hosts squirrels year-round, and the key to spotting different species is matching habitat type, time of day, and seasonal activity. The state's three common tree squirrels are the eastern gray, fox squirrel, and red squirrel, plus the nocturnal southern flying squirrel. Start by understanding what habitat each species prefers, then use the state wildlife hub and animal facts page to narrow your first location based on recent conditions and access. A short outing with one clear viewing plan, focused on the right time window and the most useful ID markers, often succeeds better than rushing through too much ground.

1. What are the types of squirrels found in Pennsylvania?

Pennsylvania hosts three common tree squirrels: the eastern gray squirrel (Sciurus carolinensis), the fox squirrel (Sciurus niger), and the red squirrel (Tamiasciurus hudsonicus). A fourth, the southern flying squirrel, is nocturnal and rarely seen. The eastern gray is by far the most widespread, while fox squirrels dominate the western farmlands and red squirrels stick to conifer forests.

In Pennsylvania, squirrels sightings usually improve when you slow down and match your first stop to the most useful ID markers and likely lookalikes. Use thestate wildlife huband theroute guideto narrow your first area, then check access, weather, and distance before you settle in. A short walk with one clear viewing plan often beats covering too much ground, especially when habitat changes fast from open edges to brush, wetlands, timber, shoreline, or neighborhood cover.

2. How can you tell apart an eastern gray squirrel from a fox squirrel?

Size and tail shape are the quickest clues. Fox squirrels are larger and bulkier, with a more rounded, bushy tail that often has a reddish underside. Eastern grays are smaller, sleeker, and their tail flattens when running. Coloration varies: grays can be all gray or have brownish patches, while fox squirrels range from gray-brown to rusty orange, especially on the belly.

Most misses happen when people arrive at the wrong hour or expect nonstop activity. Build around where in the state people usually notice them first, keep one backup area in mind, and use theanimal facts pageplustour planning ideasto compare what a realistic outing looks like in Pennsylvania. If movement slows, stay longer at one promising spot, listen for calls or watch for edge movement, and reset around weather, light, water, or feeding changes instead of jumping to a totally new area too early.

3. Where in Pennsylvania are you most likely to see each species?

Eastern grays turn up statewide, from city parks to deep woods. Fox squirrels concentrate in the western and central agricultural valleys, especially around hedgerows and open woodlots. Red squirrels prefer northern conifer stands and high-elevation forests in the Poconos and Alleghenies. For a good mix, visitstate game landsor the largerforest preserves.

See ourstate animal guidefor the next step.

4. What is the best season for squirrel watching in Pennsylvania?

Early morning and late afternoon from late summer through early winter offer the most activity. September and October are prime: young squirrels are out learning to forage, and both gray and fox squirrels are busy caching nuts. Red squirrels are active year-round but easier to spot in fall when they noisily cut pine cones.

5. What are the key identification markers for red squirrels?

Red squirrels are about half the size of grays, with a rusty-red back, white belly, and a prominent white eye-ring. Their tail is reddish with a black fringe. Listen for their sharp, scolding chatter and watch for them darting along tree trunks. They are most often seen in mixed conifer-hardwood forests, not in open lawns.

6. Are there any lookalikes or similar species to watch for?

The only close lookalike is the eastern chipmunk, but chipmunks have stripes on their back and are much smaller. Flying squirrels resemble small grays but have a loose flap of skin between front and rear legs. If you see a squirrel gliding between trees at dusk, it is a southern flying squirrel. Otherwise, any squirrel active during the day is almost certainly one of the three main species.

7. What should you look for to confirm a fox squirrel sighting?

Fox squirrels are the heaviest of Pennsylvania's tree squirrels, often appearing twice the mass of a gray. Their belly is typically reddish or orange, and the tail is thick and less flattened. In flight they seem to bound with a heavier gait. The best places to confirm are open farm woodlots in the western half of the state; tryCrawford Countyor thecentral valleys.

8. Can you attract squirrels for closer observation in your yard?

Yes, but be patient. Full sunflower seeds in a tray feeder or a dedicated squirrel feeder with corn will bring in grays and fox squirrels. Red squirrels prefer black oil sunflower and will visit if you live near woods. Place feeders near natural cover like shrubs or a tree trunk. Once they habituate, you can study their markings and behavior from a window. A spotting scope helps with ID details.

9. What squirrel-themed gear helps you show off your sightings?

After a long day of squirrel ID, a comfortable tee is a great way to share your interest. The Wild Wings Wildlife T-Shirt Gray Squirrel offers a clean, realistic print. For a more fun look, try the Squirrel Lover Vintage T-Shirt or the Squirrel Shirt with a humorous design. Browse more options in ourwildlife t-shirt collection.

See ourtour planning ideasfor the next step.

10. How do habitat preferences help you predict which squirrel species you will encounter?

Each squirrel species in Pennsylvania has evolved to thrive in specific environments. Eastern gray squirrels adapt to almost any setting: hardwood forests, mixed woods, urban parks, and even suburban backyards where oak, hickory, and beech trees drop mast. They are generalists and highly successful across the state. Fox squirrels require more open structure, with scattered large trees and clearings or agricultural land nearby; they rarely venture into dense, continuous forest. Red squirrels are specialists of conifer and mixed conifer-hardwood forests, preferring higher elevations in the state where spruce and hemlock are abundant. By identifying the dominant tree species and forest structure at your location, you can predict which squirrel is most likely to be present before you even begin watching.

11. What behavioral differences can help you distinguish between species in the field?

Behavior reveals species identity as clearly as appearance. Eastern gray squirrels are bold, often seen in the open, and tolerate close human approach in parks and yards. They move with fluid, controlled leaps and spend much time foraging on the ground. Fox squirrels are more wary and spend more time in trees; they move with a heavier, bounding gait and often perch motionless on large branches. Red squirrels are hyperactive and territorial, constantly vocalizing and chasing each other. They dart rapidly along branches and trunks, and their loud, rapid chatter is often heard before they are seen. Southern flying squirrels are strictly nocturnal, emerging after dark to glide silently between trees. If you see a squirrel in active motion in daylight, listen to its calls and observe its gait and tree preference to narrow the species.

12. Which Pennsylvania counties offer the best diversity of squirrel species in one outing?

The western counties offer the richest mix. Crawford, Mercer, and Warren counties in the northwest have hardwood forests for eastern grays and reds, plus agricultural lands for fox squirrels. The Pocono region in the northeast, including Pike and Carbon counties, supports red squirrels in the higher elevations and grays throughout. For a single-day outing that captures multiple species, plan a route that includes a mix of forest types: start in open farmland or hedgerow habitat in the morning for fox squirrels, move to mature hardwood forest by mid-day for gray squirrels, and finish in a conifer patch at higher elevation for red squirrels. Thestate wildlife huband state game lands permit system can help you identify public access points in these counties.

Gear and field guides

Frequently asked questions

What types of squirrels live in Pennsylvania?+

Pennsylvania hosts three common tree squirrels: the eastern gray squirrel (Sciurus carolinensis), the fox squirrel (Sciurus niger), and the red squirrel (Tamiasciurus hudsonicus). A fourth, the southern flying squirrel, is nocturnal and rarely seen. The eastern gray is by far the most widespread, while fox squirrels dominate the western farmlands and red squirrels stick to conifer forests. In Pennsylvania, squirrels sightings usually improve when you slow down and match your first stop to the most useful ID markers and likely lookalikes. Use thestate wildlife huband theroute guideto narrow your first area, then check access, weather, and distance before you settle in. A short walk with one clear viewing plan often beats covering too much ground, especially when habitat changes fast from open edges to brush, wetlands, timber, shoreline, or neighborhood cover.

How do you tell squirrels apart in Pennsylvania?+

Pennsylvania hosts three common tree squirrels: the eastern gray squirrel (Sciurus carolinensis), the fox squirrel (Sciurus niger), and the red squirrel (Tamiasciurus hudsonicus). A fourth, the southern flying squirrel, is nocturnal and rarely seen. The eastern gray is by far the most widespread, while fox squirrels dominate the western farmlands and red squirrels stick to conifer forests. In Pennsylvania, squirrels sightings usually improve when you slow down and match your first stop to the most useful ID markers and likely lookalikes. Use thestate wildlife huband theroute guideto narrow your first area, then check access, weather, and distance before you settle in. A short walk with one clear viewing plan often beats covering too much ground, especially when habitat changes fast from open edges to brush, wetlands, timber, shoreline, or neighborhood cover.

Which squirrel is most common in Pennsylvania?+

Pennsylvania hosts three common tree squirrels: the eastern gray squirrel (Sciurus carolinensis), the fox squirrel (Sciurus niger), and the red squirrel (Tamiasciurus hudsonicus). A fourth, the southern flying squirrel, is nocturnal and rarely seen. The eastern gray is by far the most widespread, while fox squirrels dominate the western farmlands and red squirrels stick to conifer forests. In Pennsylvania, squirrels sightings usually improve when you slow down and match your first stop to the most useful ID markers and likely lookalikes. Use thestate wildlife huband theroute guideto narrow your first area, then check access, weather, and distance before you settle in. A short walk with one clear viewing plan often beats covering too much ground, especially when habitat changes fast from open edges to brush, wetlands, timber, shoreline, or neighborhood cover.