Squirrels in Wisconsin: Identification Guide and Where to Start Looking

What are the most useful ID markers for Wisconsin squirrels?

The four common squirrel species in Wisconsin share similar shapes but differ dramatically in size and color. Eastern Gray Squirrels have a gray body with a white belly and a bushy tail with white-tipped hairs creating a white edge. Fox Squirrels are larger, often reddish-brown to orange, with a rusty or orange belly that contrasts sharply with their back. Red Squirrels are about half the size of Gray Squirrels, reddish with a white belly, and have a narrower, quicker-moving tail with a less fluffy appearance. Southern Flying Squirrels are small, grayish-brown, with a gliding membrane between their front and rear legs; they are nocturnal and rarely seen by day.

To ID quickly, start with size: if it's much larger than a chipmunk but smaller than a cat, you likely have a Gray or Red Squirrel. If it's the size of a small rabbit, it's probably a Fox Squirrel. Next, look at the belly: white belly means Gray or Red Squirrel; orange or rusty belly means Fox Squirrel. Then examine the tail: full and bushy with white tips is Gray; smaller and more orange is Red; flying squirrels have a flattened tail.

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Where in the state do people usually notice squirrels first?

Most Wisconsin residents spot squirrels in suburban backyards and city parks, especially near oak and hickory trees where mast (acorns and hickory nuts) fuels their diet. State forests like the Chequamegon-Nicolet National Forest and Kettle Moraine State Forest offer reliable sightings year-round. Fox Squirrels favor open woodlands and farm edges with scattered trees, because they like to see predators coming from a distance. Gray Squirrels are common in both rural and urban areas and are highly adaptable, thriving in golf courses, cemeteries, and neighborhood trees. Red Squirrels prefer coniferous forests (pine, spruce, fir) in the northern part of the state and higher elevations, where they depend on pine seed production. Southern Flying Squirrels live in mature deciduous or mixed forests with large cavities for nesting but are difficult to spot because of their night-active lifestyle.

For best viewing odds, visit oak-dominated woods in fall or well-established urban parks in any season. Urban squirrels are often less wary than forest populations, making them easier to observe at close range.

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What is the best season or time window for confident sightings?

Squirrels are active year-round, but fall (September through November) is the easiest time to see them as they gather acorns and bury them obsessively in caches. Early morning (dawn to 10 a.m.) and late afternoon (4 p.m. to dusk) are the most active feeding periods across all seasons. Winter sightings are possible on sunny days, especially at bird feeders, though squirrels are less active during extreme cold and may rest in their dreys (tree nests) for days. Spring and summer bring new litters, so you may see juveniles exploring for the first time, often less cautious than adults. Late summer through early fall is also ideal because squirrel populations are at their peak after spring births, and food availability is high.

If you're targeting a specific species: Fox Squirrels are most visible in open habitats during midday when thermal exposure is less critical. Red Squirrels peak in activity in late summer and fall when pine cones ripen. Flying Squirrels are active at night, so listen for soft chirping or gliding sounds after sunset, or look for them in tree cavities with binoculars using a headlamp.

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How can you tell a gray squirrel from a fox squirrel?

Size and belly color are the clearest differences. Eastern Gray Squirrels weigh about 1.5 pounds and have a white or grayish-white belly, with a mix of gray and brown fur on their back. Fox Squirrels are heavier (about 2 pounds) with a distinctly orange, rusty, or burnt-sienna belly that creates a striking two-tone pattern. Fox Squirrels also have a more uniform reddish-brown back, whereas Gray Squirrels have a salt-and-pepper gray. Tail shape helps: Gray Squirrels have a flat, highly bushy tail with white-tipped hairs that give it a white border; Fox Squirrels have a more rounded, densely furred tail that looks heavier and is more uniformly rusty. When you see them side by side or in succession, the Gray looks more petite and streamlined, while the Fox looks stocky and powerful.

Behaviorally, Fox Squirrels tend to spend more time on the ground foraging and are less likely to climb to high branches, while Gray Squirrels are more agile climbers and often perch high in trees. In Wisconsin, Fox Squirrels are more common in open oak woodlands and farm country, while Gray Squirrels dominate suburban and urban areas.

What about red squirrels and flying squirrels?

Red Squirrels are smaller (12 to 14 inches total length, about half the size of a Gray Squirrel) with a reddish coat, white belly, and distinctive white eye ring. They have a distinct scolding call (often described as a loud, chattering 'chirp' or bark) and are often found near pine or spruce stands where they defend cones vigorously. Their tail is noticeably thinner and more rusty-orange than a Gray's. Southern Flying Squirrels are nocturnal and about 9 to 10 inches long, with a grayish-brown body and white belly. Their most distinctive feature is the gliding membrane (patagium) that stretches between their front and rear legs; when gliding, they flatten their tail and spread their limbs to become a living parachute. Look for them in mature forests with dead snags and cavities. At night, listen for soft chirps or look for gliding movement between trees as they pass through moonlight.

The Northern Flying Squirrel, listed as Special Concern in Wisconsin, is harder to spot. It resembles the Southern Flying Squirrel but has a reddish-brown (rather than white) belly and is found only in old-growth mixed forests in the far north. Its range barely overlaps the southern state line counties. Both flying squirrels have large eyes for night vision and are much more common than you might think, they just stay hidden during daylight.

Are there any squirrel species in Wisconsin that are rare?

The Northern Flying Squirrel is state-listed as Special Concern and is found only in the northern coniferous forests of Wisconsin, mainly in Ashland, Bayfield, and Douglas counties. It resembles the Southern Flying Squirrel but has a reddish-brown belly and prefers old-growth mixed forests with red spruce and hemlock. Its habitat is limited and fragmented. Your best bet for a Northern Flying Squirrel sighting is in the Chequamegon-Nicolet National Forest, but sightings are uncommon and you'd need to work with a naturalist or wildlife biologist. The species is threatened by forest fragmentation and loss of old-growth habitat.

The Mexican Fox Squirrel (not native to Wisconsin) has been introduced in a few urban areas but is extremely rare. It appears in scattered reports from Milwaukee and Madison, likely from escapes or intentional releases, but it does not establish breeding populations outdoors in Wisconsin's climate.

Fox Squirrel and Gray Squirrel populations are stable and increasing in most of Wisconsin due to urban expansion and forest fragmentation favoring these adaptable species.

What gear helps with squirrel watching in Wisconsin?

A pair of binoculars (8x or 10x magnification) helps you spot distant squirrels and look for tail shape and belly color without disturbing them. A field guide to mammals of the Midwest (e.g., Peterson or Kaufman guides) can be useful for reference, though this guide covers the essentials. A journal or notebook lets you record observations and build your personal squirrel ID skills over time. For patience, bring a camp chair and a thermos of coffee to a reliable squirrel spot and watch for an hour. For more comfortable backyard viewing, we have some squirrel-themed shirts that show appreciation for these lively animals.

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How do you distinguish Red Squirrels from Gray Squirrels at a distance?

At distance, size is your fastest cue. Red Squirrels appear noticeably smaller, almost half the bulk of a Gray Squirrel. From 20 feet away, look for the Red's overall reddish-orange coloration versus the Gray's salt-and-pepper gray. The tail provides another reliable signal: the Red's tail is thinner and more rope-like, while the Gray's is thick and brushy. Red Squirrels also move differently, they tend to dart and pause, with quick jerky movements, whereas Gray Squirrels have a more deliberate, flowing gait. If you hear a loud, aggressive chatter or scolding noise, it's almost certainly a Red Squirrel defending its territory or cache. Reds are vocal and territorial; Grays are quieter and more gregarious.

What behavioral clues help you ID squirrel species while watching?

Watch how a squirrel moves and what it does. Flying squirrels climb straight up tree trunks with their legs akimbo (spread wide), then glide down at an angle, which is unmistakable once you've seen it. Fox Squirrels spend more time on the ground than Gray Squirrels and often sit upright on their haunches when alert. Gray Squirrels are more likely to be in trees and on branches at all heights. Red Squirrels tend to stick to conifers and higher branches and are highly vocal and aggressive toward other squirrels. Gray Squirrels are more tolerant of each other and often feed in small groups. Fox Squirrels are solitary and less social.

Observe feeding behavior: if a squirrel is systematically covering its mouth with its paws and burying food in the ground at regular intervals, it's likely an Eastern Gray Squirrel or Fox Squirrel in caching mode. Red Squirrels cut pine cones and harvest the scales methodically, leaving piles of cone debris (called middens) near their den. Fox Squirrels prefer open ground for food storage, while Grays use a scatter-hoard strategy across a wide area. Flying squirrels eat seeds, insects, and fungi but are quiet and secretive.

What tree species attract which squirrels in Wisconsin?

Oak trees are the superstar. Fox Squirrels and Eastern Gray Squirrels both depend on acorns (especially from red oak, white oak, and bur oak trees) in the fall. If you find a mature oak stand with active squirrels, you've found reliable viewing spots. Hickory trees (shagbark, pignut) are secondary mast producers and equally attractive. Beech trees produce small nuts and also draw squirrels.

Red Squirrels depend on conifers: white pine, red pine, eastern hemlock, and spruce provide pine cones. You'll find Red Squirrels concentrated in conifer plantations and mixed forests in northern Wisconsin. Sugar maples attract squirrels in spring when they tap for sap, though this is less reliable.

Fruit-bearing trees (crabapple, cherry, mulberry) attract all squirrel species in summer. Urban parks and yards with a mix of oak, maple, and fruit trees support diverse squirrel populations. If you want to attract squirrels to your property for observation, plant native oaks and hickories; mature trees draw more squirrels than young ones.

What are common questions about squirrels in Wisconsin?

**Do squirrels hibernate in Wisconsin?** No, they remain active all winter, relying on cached food (acorns and nuts they buried in fall). However, they may be less active during extreme cold and may rest in their dreys (tree nests) for days without venturing out.

**Are there black squirrels in Wisconsin?** Yes, black morphs of the Eastern Gray Squirrel occur occasionally, especially in urban areas like Madison and Milwaukee. Black squirrels are the same species as gray ones; the color is a genetic variant. They're more common in cities than in wild forests.

**Can I attract squirrels to my yard?** Yes, provide a mix of black oil sunflower seeds, peanuts, and acorns. A platform feeder or a dedicated squirrel feeder works well. Keep feeders away from power lines and thick brush to avoid predators and give squirrels clear sightlines.

**What predators eat squirrels in Wisconsin?** Hawks (especially Red-tailed Hawks), owls (Barred and Great Horned), foxes, coyotes, and snakes are common predators. Learn more abouthawksandowlsin the state.

**How long do Wisconsin squirrels live?** Wild squirrels typically live 5 to 8 years, though captive animals can reach 20 years. Predation and disease are major mortality factors.

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