Most people walk right past a woodchuck burrow without realizing what it is — a tunnel dug by New York’s only native marmot, a true hibernator that spends nearly half the year underground. If you’ve ever wondered when these stocky, grizzled rodents finally resurface each spring, the answer depends on where in the state you are, how cold the winter ran, and whether you’re watching for males or females.
In this guide, you’ll learn which marmot species calls New York home, when it goes underground, when it comes back out, what it does in those first critical weeks of spring, where you’re most likely to spot one, and what signs to look for when you’re out in the field.
Which Marmot Species Live in New York
New York is home to exactly one marmot species: the woodchuck (Marmota monax), also widely known as the groundhog or whistle pig. The groundhog is a rodent of the family Sciuridae, belonging to the group of large ground squirrels known as marmots. While other marmot species — such as the yellow-bellied marmot and the hoary marmot — live in the mountainous West, the groundhog is exceptional among marmots because it is a lowland animal; other marmots, such as the yellow-bellied and hoary marmots, live in rocky and mountainous areas.
Woodchucks are the most widespread of the marmot species in North America. They can be found throughout Alaska and east into Labrador, Canada, as far south as Georgia, and to Oklahoma in the West. They occur throughout most of New York State, with the exclusion of high elevation areas like the Adirondack and Catskill mountains.
Nine subspecies of Marmota monax are recognized. The subspecies found in the Adirondack region is Marmota monax rufescens. Regardless of subspecies, all woodchucks in New York share the same seasonal rhythms and behavioral patterns described throughout this article.
Key Insight: The groundhog is a marmot. When you see a woodchuck in a New York field or roadside, you’re looking at the same genus — Marmota — as the iconic western marmots of the Rockies and Sierra Nevada.
Woodchucks are among the largest ground squirrels and are the most widespread of the marmot species. They are stocky in appearance and are often seen standing up on their hind legs. Their coat varies from a dark brown, to cinnamon, to gray color, with white-tipped guard hairs. They have a short bushy tail that is dark brown to black in color, and small, rounded ears that cover the ear canal, preventing dirt from entering while burrowing.
When Do Marmots Hibernate in New York
Woodchucks are among the most committed hibernators in the northeastern United States. They are among the few mammals that enter into true hibernation. Hibernation varies with latitude, but generally begins near the end of October or early November and continues until late February and March.
In New York specifically, the timing shifts depending on elevation and region. In the Adirondack region, woodchucks generally begin hibernating in late September or early October. At lower elevations across the rest of the state, they typically hold on a few weeks longer before retreating underground.
Before entering the den, woodchucks engage in a period of intense eating. In early June, woodchucks’ metabolism slows, and while their food intake decreases, their weight increases by as much as 100% as they produce fat deposits to sustain them during hibernation and late winter. Instead of storing food, groundhogs stuff themselves to survive the winter without eating.
Once underground, the physiological changes are dramatic. When the groundhog enters hibernation, there is a drop in body temperature to as low as 35 degrees Fahrenheit (2°C), heart rate falls to 4–10 beats per minute, and breathing rate falls to one breath every six minutes. Woodchucks lose 30–40 percent of their body weight while hibernating because of fat depletion, and emerge gaunt and thin in the spring.
Pro Tip: The woodchuck’s winter burrow is separate from its summer burrow. Winter burrows are usually in wooded areas, whereas summer burrows are found near grassy or agricultural fields where food is available, sometimes under a barn.
You can read about similar winter dormancy patterns in other New York wildlife — including how snakes emerge from brumation in New York each spring as temperatures climb.
When Do Marmots Come Out of Hibernation in New York
This is the question most New Yorkers are curious about — and the answer is more nuanced than Groundhog Day folklore suggests. Contrary to the expectations of Groundhog Day, February 2, few woodchucks emerge to search for their shadows. They are more likely to leave their burrows in March, mid to late March at higher elevations.
Across the broader state, the general window is late February through March. Woodchucks enter hibernation between mid-September and October and emerge in late February or March. At lower elevations in the Hudson Valley, Long Island, and other warmer parts of the state, some individuals may stir as early as mid-to-late February during a warm spell, while woodchucks in the Catskills or Adirondack foothills typically wait until March.
Groundhogs hibernate longer in northern latitudes than southern latitudes. This means a woodchuck in the Southern Tier may emerge a week or two ahead of one living near the Canadian border. Emergence from the den is correlated with periods of warm weather.
Males and females also follow different schedules. Male woodchucks emerge from hibernation earlier than females in order to establish territories, dominance hierarchies, and to search for mates. If you spot a woodchuck in late February in New York, it is almost certainly a male.
Important Note: Early emergence doesn’t always mean a woodchuck is staying out for good. The legend of Groundhog Day is likely due to the fact that woodchucks often re-enter hibernation after emerging from their dens prematurely. A cold snap following a warm spell can send them back underground for days or even weeks.
For comparison, bears in neighboring states follow a similar but distinct seasonal pattern — you can explore when bears emerge in Massachusetts or when bears come out in Connecticut to see how hibernation timing varies across the Northeast.
What Marmots Do Immediately After Hibernation in New York
The first few weeks after emergence are among the most active and consequential in a woodchuck’s year. They are lean, hungry, and driven by the urgency of the breeding season — all at once.
Eating and rebuilding fat reserves
They emerge from hibernation with some remaining body fat to live on until the warmer spring weather produces abundant plant materials for food. In early spring, before grasses and clovers are fully growing, woodchucks will eat whatever tender vegetation is available. If they awake out of hibernation before new plant growth, they will eat bark and small branches.
Mating
Breeding begins almost immediately after emergence. Woodchucks usually begin breeding activity during late February or March. Males emerge from hibernation first and travel from burrow to burrow in search of a mate. According to researcher Zervanos, “most matings happen in a ten-day period in early March.” If offspring are born too late, they can’t get enough weight for winter, and if born too early, the female doesn’t have enough food to feed them — the window of opportunity is very small.
Sunbathing and territory defense
Woodchucks are conspicuous along many Adirondack roads because of the upright, alert posture they adopt periodically while active above ground, and their habit of sunbathing on logs and rocks in the spring. Thermoregulatory basking — spending time sunning near burrow mouths — helps them warm up after cold nights or after spring emergence.
Raising young
The gestation period lasts about a month; young are born in early April to mid-May. Woodchucks have only one litter per year that varies from two to nine young, although the average is four. Six-week-old chucks leave the burrow to feed on grasses; they leave the parent’s den permanently by early July.
Pro Tip: Spring is the best time to observe woodchucks in New York. In early spring and late summer, they tend to be most active in the middle of the day — unlike midsummer, when they shift to early morning and late afternoon activity.
If you’re interested in how other hibernating mammals behave right after waking up, see our guides on bear emergence in Maine and bear emergence in Maryland for regional comparisons.
Where to Spot Marmots in New York
One of the great things about woodchucks in New York is how accessible they are. They can be seen almost anywhere in the state. You don’t need to travel to a remote wilderness area — a farm road, a highway median, or the edge of a suburban park can all be productive spots.
Preferred habitat types
Woodchucks inhabit many different ecosystems. They are mostly found at low elevations near forests, agricultural fields, woodlots, and human developments. They thrive off of food access that humans provide. They prefer meadows, pastures, crop fields, and yards that are close to a woods edge. They are common in brushy or weedy areas along fence rows or road right-of-ways.
Best locations across the state
- Hudson Valley and Catskill foothills: Farm fields, old orchards, and roadsides are excellent. Look for burrow mounds at the edges of fields where mowed grass meets brushy cover.
- Western New York and the Finger Lakes: Agricultural land around Seneca, Cayuga, and Canandaigua lakes supports dense woodchuck populations. Allegany State Park is a known location where woodchucks have been observed raising young.
- Long Island: Woodchucks are present, particularly in Nassau and Suffolk county parks, open fields, and golf course edges.
- Adirondack periphery: They are most abundant in the fields of the Adirondack Park’s periphery rather than deep in the high peaks wilderness.
Look for signs of their burrows along the edge of meadows, cleared agricultural lands, and old fields. Roadside shoulders along rural state routes — especially Routes 20, 20A, and 5 through central and western New York — are reliable spots to observe woodchucks in spring and summer.
Key Insight: Woodchucks are typically found in low-elevation forests, small woodlots, fields, pastures, and hedgerows. Human activities such as clearing forests, building roads, and agriculture have increased food access and abundance, allowing them to thrive.
How to Tell If a Marmot Is Active in New York
You don’t always need to see a woodchuck to know one is around. Several reliable signs tell you whether a burrow is currently occupied and active.
Fresh burrow mounds
The most obvious evidence of woodchuck presence is a mound of soil and stones at the main burrow entrance. There are normally at least two or three entrances. A freshly disturbed mound with loose, damp soil is a strong sign of recent activity. A mound covered in dry, compacted soil or overgrown with grass suggests the burrow may be abandoned.
Entrance diameter
Woodchuck burrows can be identified by the large mound of excavated earth at the main entrance. On this mound, the woodchuck frequently sits to look for danger. From the entranceway, which is 10 to 12 inches in diameter, the burrow goes down at a rather steep angle and then levels off into a narrower tunnel. Secondary entrances lack the dirt mound and are often harder to find.
Vegetation clipping near the entrance
An active woodchuck will clip and eat grasses and clovers close to the burrow. Look for short, nibbled vegetation in a radius of roughly 50 to 150 feet around the main entrance. Woodchucks usually range only 50 to 150 feet from their den and can retreat quickly into the burrow when threatened.
Tracks and scat
Woodchuck tracks show four toes on the front feet and five on the back, with claw marks visible in soft mud or loose soil near burrow entrances. Scat is rarely seen in the open because groundhogs defecate in toilet chambers dug underground, but droppings near a mound can indicate recent surface activity.
Vocalizations
If you startle a woodchuck, you’ll likely hear it before it vanishes. If alarmed, the woodchuck may give a sharp whistle-like sound — hence the name “Whistle Pig” — before it ducks back into its burrow. Hearing that sharp, high whistle in a field edge is a reliable sign that at least one woodchuck is active nearby.
Timing your visit
Woodchucks are mainly diurnal. In midsummer, they are most active early in the morning and late in the afternoon. In spring, however, midday visits are just as productive. Arrive at a known burrow site on a calm, sunny morning for the best chance of an extended observation.
Common Mistake: Assuming an undisturbed mound means the burrow is empty. After emerging from hibernation, woodchucks spend much of their time in or near their burrows. A quiet entrance can simply mean the animal is resting just inside — not that it has moved on.
Watching for active wildlife in New York doesn’t stop with marmots. You might also want to know when snakes become active in New York, since several species share the same meadow and field-edge habitats as woodchucks. For broader regional context, see how bear emergence timing in Colorado compares to patterns in the Northeast, or explore hibernation emergence in Idaho to understand how latitude and elevation shape these cycles across North America.