Squirrels in Massachusetts: identification guide and where to start looking

1. What squirrel species live in Massachusetts?

Massachusetts has four main squirrel species: Eastern Gray Squirrel, Red Squirrel, Northern Flying Squirrel, and Woodchuck (a ground squirrel). The Eastern Gray is the most widespread and easy to see, living in yards, parks, and forests statewide. Red Squirrels are smaller with reddish fur and white eye rings, and they prefer coniferous forests in central and western regions. Flying Squirrels are nocturnal and rarely spotted by casual observers, but they are present in mature deciduous forests. Woodchucks are larger, ground-dwelling, and often seen near fields, roadsides, and stone walls. Each species has a unique niche in the Massachusetts landscape, so identifying which one you have seen depends on where and when you spotted it.

2. How can you tell Eastern Gray Squirrels apart from other species?

Eastern Gray Squirrels have a bushy tail tipped with white, a gray body, white belly, and no ear tufts. They are about 9-12 inches long plus a tail of similar length, making them chunky and robust. Their large size is the easiest field mark. Red Squirrels are roughly half that size, with reddish-brown or rust-colored fur and distinctive white eye rings. Winter Red Squirrels develop small tufts on their ears, a feature Gray Squirrels never have. Flying Squirrels have a loose skin flap between their front and hind legs, large dark eyes adapted for night vision, and a flattened tail they use as a rudder when gliding. Woodchucks are 16-20 inches long, heavily built, grizzled brown or tan, with short legs and a short bushy tail. For more detail, see thesquirrel identification page.

3. What physical features help you identify squirrels in the field?

Start with overall size and shape. Eastern Gray Squirrels are large and husky with a massive bushy tail. Red Squirrels are slim and small with a tail that looks thinner relative to body size. The tail itself is a key feature: Gray Squirrels have thick, dense tails with white tips, while Red Squirrels have bushy tails with a rusty color. Belly color separates Gray Squirrels, which have stark white bellies, from Red Squirrels, which have white bellies but smaller contrast. Ear tufts are present only on Red Squirrels in winter and fall. Eye rings, small white circles around the eyes, appear only on Red Squirrels. Woodchucks have no tail to speak of, just a short stub, and their grizzled fur is much darker and coarser than squirrels. A flying squirrel's gliding membrane and large eyes are unmistakable if you see one at night. Color alone is not enough; always combine color with size and tail shape.

4. Where in Massachusetts are you most likely to spot each squirrel species?

Gray Squirrels are everywhere from Boston parks to the Berkshires. Look in wooded suburbs, college campuses, urban parks, and state forests. They thrive wherever there are oak and hickory trees. Red Squirrels prefer coniferous or mixed forests in central and western Massachusetts, especially around spruce, fir, and pine stands. They are common in the hills around Worcester, in the Quabbin Reservoir region, and throughout the northern Berkshires. Flying Squirrels favor mature deciduous forests with large cavity trees, typically at higher elevations or in old-growth patches. Woodchucks are common in grassy areas along roadsides, stone walls, and meadows, especially in central and western regions. They are less common in dense urban areas. Check theMassachusetts wildlife hubfor more spot locations.

5. How to spot squirrels by habitat and season?

Early morning and late afternoon are the most active times for all squirrel species. Fall is the best season for spotting because squirrels are busy gathering acorns and nuts, and you can hear them rustling in leaf litter. Look in oak and hickory groves in September through November. Winter is quieter but good on sunny days when squirrels come out to eat cached seeds. Spring brings mating chases and new litters, making squirrels more vocal and active around nesting sites. Summer can be less active in heat, but early mornings still work. Wet weather drives squirrels into trees and out of sight. Dry, cool days are ideal. Target mature trees with cavities and food sources. Gray Squirrels do best in mixed hardwood forests. Red Squirrels do best near coniferous stands. Flying Squirrels emerge at dusk and are most active two hours after sunset. Woodchucks are most visible from April through September.

6. What do squirrel nests (dreys) look like and where to find them?

Squirrel nests are globular clusters of leaves and twigs high in tree forks, usually 20-30 feet up. They are easiest to spot in winter after leaves fall. Gray Squirrels build leaf nests or use tree cavities, and they often have multiple nests. Look for messy balls in oaks, maples, and hickories. Red Squirrels use cavities and build smaller stick nests high in conifers, often with a single nest they maintain year-round. Flying Squirrels exclusively use cavities in dead trees, and they line nests with shredded bark and leaves. Woodchucks do not build nests but burrow underground. Nests are surrounded by loose twigs and bark strips. Gray Squirrel dreys are larger than Red Squirrel dreys. If you see a glob of leaves at 50 feet in an oak tree in November, it is almost certainly a Gray Squirrel nest. Finding a nest confirms squirrel activity in that tree.

7. How do you identify squirrel tracks and signs?

Squirrel tracks show four toes on front feet, five on hind, with small claw marks. Their hopping gait leaves pairs of small prints followed by larger ones, creating a bounding pattern. In sand or snow, the print is about 1-1.5 inches wide for Gray Squirrels and half that for Red Squirrels. Look for chewed pine cones, which are distinctive. Gray Squirrels leave coarse scattered scraps of cone material. Red Squirrels leave a spiral chew pattern and pile scales neatly. Look for gnawed bark on young trees, a sign of winter activity. Middens are piles of nut shells and cone debris under a feeding branch. Gray Squirrel middens are large and messy. Red Squirrel middens are compact and carefully arranged. Scat is small and dark. Squirrels also leave claw marks on bark climbing up trees. Acorns with one large bite mark indicate Gray Squirrels; spiral fractures indicate Red Squirrels.

8. What gear or apparel can help you enjoy squirrel watching?

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9. How do squirrel eyes and ears differ between species?

Eastern Gray Squirrels have dark round eyes positioned on the sides of the head, typical for tree squirrels. Their eyes are not particularly large or prominent. Ear tufts are completely absent. Red Squirrels have similar eye placement but add ear tufts in fall and winter, which are small but visible pointed fur tufts at the tips of the ears. These tufts disappear in summer, a seasonal feature. Flying Squirrels have enormous dark eyes, much larger than any other squirrel species in Massachusetts. These huge eyes are an adaptation for night vision and are unmistakable if you see a flying squirrel. Woodchucks have small dark eyes and rounded ears, but no tufts. Eye size and ear tufts are quick identifying clues once you know what to look for. Gray Squirrels never have ear tufts, making this a reliable field mark to rule them out if you see tufts.

10. What sounds do squirrels make and what do they tell you?

Gray Squirrels produce a variety of calls. A loud chuck-chuck-chuck alarm call warns other squirrels of danger, usually from a perched position. A softer quack sound is made during mating season. Teeth chattering indicates frustration or territorial aggression. Red Squirrels are noisier than Gray Squirrels and produce high-pitched chitter calls and a buzzing chatter that can be heard 200 feet away. These calls are used to mark territory and warn of predators. Flying Squirrels are mostly silent but occasionally make soft chirps. Woodchucks whistle when alarmed, a high-pitched sound that gives them their other name, whistle-pig. Learning to recognize squirrel calls helps you locate them even when they are hidden in foliage. Alarm calls often mean a predator or human is nearby. Mating calls in early spring indicate breeding season. Silent squirrels are often hunting or foraging and may allow closer approach.

11. Behavioral differences between squirrel species?

Eastern Gray Squirrels are diurnal, bold around humans, and often approach feeders. They are social and gather in loose groups. They are active during the day year-round and do not hibernate, though they rest during harsh weather. Red Squirrels are also diurnal but more solitary and territorial. They aggressively defend feeding areas and will chase other squirrels away. Red Squirrels are known for their hyperactivity and can seem nervous. They are vocal communicators. Flying Squirrels are entirely nocturnal, emerging after dark. They are gentle and rarely seen. They glide from tree to tree using their skin membranes, making dramatic silhouettes against the night sky. Woodchucks are crepuscular, most active at dawn and dusk. They are terrestrial and often stand upright to survey their surroundings. They are solitary except during mating season. Behavioral observation helps confirm identification, especially if you cannot see physical features clearly.

12. Frequently asked questions about squirrels in Massachusetts?

**Are squirrels active all year in Massachusetts?** Yes, all four species are active year-round, though they stay in nests during harsh storms. They do not hibernate but enter a state of reduced activity called torpor in winter.

**Can I feed squirrels in my backyard?** It is legal to feed squirrels in Massachusetts, but offer unsalted nuts and seeds only. Avoid bread, candy, and processed food, which cause digestive problems. Feeding can tame squirrels over time.

**Do squirrels damage homes?** They may chew into attics and soffits to access nest sites in late summer. Seal entry points with hardware cloth and trim tree branches that touch roofs. One-way doors allow escape but prevent re-entry.

**Where to report a sick or injured squirrel in Massachusetts?** Contact a local wildlife rehabilitator through the Massachusetts Division of Fisheries and Wildlife website. They maintain a list of licensed rehabilitators by region. Many handle squirrels.

**What is the difference between a groundhog and a squirrel?** Groundhogs, or woodchucks, are larger and ground-dwelling, while tree squirrels climb and nest in trees. Both are in the squirrel family but have evolved very different lifestyles. Groundhogs are burrowers and often hibernate.

**Do Massachusetts squirrels carry rabies?** Tree squirrels and flying squirrels very rarely carry rabies. Groundhogs carry it more often. Any wild animal behaving strangely should be reported to local animal control.

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