Most social wasp nests become empty tombs by midwinter. The colony that built the nest does not survive as a unit; workers, drones, and the founding queen all die as temperatures drop and food vanishes. Only newly mated queens escape, hiding alone in sheltered spots to wait out the cold months in a dormant state called diapause. The papery nest itself, left behind with no one to maintain or defend it, slowly deteriorates or becomes shelter for entirely different creatures. That is the short version, but the full story of what happens to a wasp nest in winter involves some genuinely impressive biology and a few surprising exceptions.
How the Colony Winds Down in Autumn
Social wasp colonies, including yellowjackets, paper wasps, and hornets in temperate climates, follow an annual cycle. A single queen founds the nest in spring, workers build it up through summer, and the colony reaches peak size sometime in late summer or early autumn. At that point, the colony shifts its energy from producing workers to producing reproductive individuals: new queens and males (drones). The workers’ job is essentially done once these reproductives emerge and mate.
After mating flights, the males die. The old queen, having laid eggs all season, is spent. Workers, which were never designed for long-term survival, stop receiving the chemical and nutritional cues that keep the colony functioning. As nights get colder and the insects and sugary food sources they rely on disappear, workers starve, freeze, or simply wear out. Within a few weeks, the once-busy nest is silent. There is no organized “shutdown.” The colony simply collapses as resources dry up and individual wasps fail, one by one.
Where the New Queens Go
The newly mated queens are the only members of the colony that carry the genetic future forward. Rather than staying in the old nest, they scatter and find individual hiding places: under loose bark, inside hollow logs, in rock crevices, behind the siding of houses, or deep in leaf litter. Once settled, they enter diapause, a state of metabolic dormancy somewhat like hibernation in mammals but controlled by different hormonal and environmental triggers. Their body temperature drops close to the surrounding air, their breathing rate plummets, and they become essentially motionless for months.
Research on how queens fuel this long dormancy reveals that fat is the critical resource. A study on paper wasps (Polistes dominula and Polistes gallicus) tracked energy store depletion across overwintering and found that lipids supplied roughly 84 to 93 percent of the queens’ energy needs during dormancy, with glycogen stores contributing a smaller but still meaningful share. Free carbohydrates barely budged during the winter months but were largely depleted by spring, suggesting that the final phase of overwintering draws on the last available quick-burn fuel just before the queen needs to become active again.1PubMed Central. The costs of overwintering in paper wasps (Polistes dominula and Polistes gallicus): the use of energy stores
Queens also appear to adjust their metabolism based on the climate they evolved in. Work on the oriental hornet found that queens from Mediterranean populations had a roughly 30 percent lower resting metabolic rate compared to queens from hotter, more arid regions, which the researchers interpreted as an adaptation for surviving a longer, colder winter with limited fat reserves.2Ecological Entomology. Body size, metabolic rate and diapause in the oriental hornet (Vespa orientalis), in two extreme climatic regions In other words, queens from places with harsh winters burn through their stored energy more slowly, stretching their supplies to last until spring. This is not something queens choose consciously; it is a population-level adaptation shaped over many generations.
Not every queen survives, of course. Overwintering mortality can be substantial. Some queens pick hiding spots that flood, freeze too deeply, or dry out. Fungal infections can take hold on dormant individuals. Birds, spiders, and small mammals sometimes find and eat them. The queens that do make it to spring are the survivors of what amounts to a months-long endurance test, and they emerge having lost a large fraction of their body weight.
What Happens to the Physical Nest
Once the colony dies off, the nest itself has no one to repair or protect it. Social wasp nests are made of wood fiber that the wasps chew into a thin paper-like pulp. This material is surprisingly strong and insulating while the colony actively maintains it, but it was never built to last beyond a single season. Rain softens the outer envelope. Wind tears open exposed surfaces. Freeze-thaw cycles crack the internal comb structure. By late winter, a nest that was a thriving fortress a few months earlier may be sagging, waterlogged, or partially collapsed.
Indoor nests, like those built in attics, wall voids, or garden sheds, fare somewhat better structurally because they are shielded from direct weather. They can remain intact for years in a dry, sheltered location. But even these nests are never reused by a new wasp colony. A returning queen in spring builds a brand-new nest from scratch rather than moving into an old one. The old structure offers nothing she needs: the comb cells are dirty, the paper is brittle, and there may be mold, parasites, or other organisms already living in it.
When Old Nests Get New Tenants
Abandoned wasp nests do not always go to waste. A variety of animals move in once the wasps are gone. Studies in Brazil have documented half of collected abandoned Polistes nests yielding entirely different species of Hymenoptera, including solitary wasps from the family Crabronidae, potter wasps (Eumeninae), and even parasitoid wasps from the Ichneumonidae family, all nesting inside the old comb cells.3Acta Biologica Brasiliensia. OCCUPATION OF ABANDONED SOCIAL WASP (VESPIDAE: POLISTINAE) NESTS BY DIFFERENT TAXON OF HYMENOPTERA These secondary occupants typically use the existing comb architecture as ready-made nesting cavities, sealing individual cells with mud or plant material after depositing eggs and food provisions inside.
The phenomenon extends well beyond insects. A study in Mexico documented a small tropical marsupial constructing its own nest using an abandoned wasp comb as structural scaffolding, a behavior that had not been formally recorded before.4Therya Notes. First record of nesting of marsupial Tlacuatzin (Didelphidae) in wasp combs Spiders commonly take up residence in old nests, stringing webs across the entrance or comb cells. Earwigs, beetles, and other invertebrates also shelter inside. In short, the death of the wasp colony creates a microhabitat that persists for months and supports a small community of opportunists.
Perennial Nests in Warm Climates
Everything described so far assumes a temperate climate with cold winters. In warmer regions, the rules change. Yellowjacket colonies in the southern United States, parts of Australia, and subtropical areas sometimes survive through winter and continue growing into a second or even third year. These “perennial” nests can become enormous, sometimes filling entire wall cavities or growing to the size of a small car. The Virginia Cooperative Extension notes that perennial yellowjacket nests are more common in the Deep South than in states like Virginia, where winters are typically cold enough to kill the colony.5Virginia Cooperative Extension. Yellowjackets in Virginia
Perennial colonies develop when winter temperatures stay mild enough that workers and the old queen survive, rather than dying off as they would in colder regions. The colony never resets. Instead, it keeps adding workers and expanding the nest. Multiple queens may eventually coexist in a perennial nest, which contributes to their explosive growth. These nests pose a much greater pest-management challenge than annual nests because they contain far more workers, sometimes tens of thousands, and the wasps defend them aggressively year-round.
Climate change may be nudging the range of perennial nesting northward. As winters become milder in places that historically had hard freezes, colonies that would have died in December or January occasionally survive into the following spring. This is difficult to quantify precisely because the phenomenon depends on hyperlocal conditions like microclimate, nest location, and species, but entomologists in mid-latitude states have reported anecdotal increases in overwintering colonies in recent decades.
Spring Emergence and Starting Over
For the queens that survive winter in diapause, spring emergence is triggered primarily by temperature. Research on a potter wasp species found that adults emerged only when temperatures reached between about 22 and 33 degrees Celsius, with a lower developmental threshold around 17 to 18 degrees Celsius depending on sex.6Ecologies. Thermal Requirement for Spring Emergence of Potter Wasp Parancistrocerus fulvipes: Implications for Population Management Under Climate Change The concept of accumulated heat, measured in degree-days, matters here: it is not just about hitting a warm day but about receiving enough total warmth over time. In practical terms, this means queens in a warm spring emerge earlier than queens in a cool spring, and queens in southern latitudes emerge before those in the north.
A broader study across multiple bee and wasp species confirmed that emergence timing is highly responsive to post-winter temperatures. Insects emerged earlier in warmer conditions, but the relationship was shaped by the long-term climate of their home region. Populations from historically warmer areas emerged earliest, suggesting a genetic component on top of the plastic temperature response.7Functional Ecology. Climatic origin and plasticity shape emergence timing and fitness in bees and wasps under experimental climate regimes This interplay between genetics and environment means that wasp emergence dates are shifting as average temperatures rise, with potential consequences for the timing of pollination, pest control, and conflicts with humans.
Once a queen emerges, she feeds intensely to rebuild the energy stores burned during diapause, then scouts for a nest site. She constructs the first few cells of a new nest herself, lays eggs in them, and raises the initial batch of workers alone. Only after those first workers emerge, several weeks later, does the queen retire to egg-laying full-time while workers take over foraging, construction, and defense. The cycle begins again from a single individual, which is why wasp populations can seem to appear out of nowhere each spring.
Solitary Wasps Have a Different Winter Playbook
The annual boom-and-bust of social wasp colonies is dramatic, but it applies mainly to social species like yellowjackets, paper wasps, and hornets. The vast majority of wasp species are solitary, and their winter strategies look quite different. Solitary wasps do not build communal nests or have worker castes. A single female provisions a nest cell with paralyzed prey, lays an egg on it, seals the cell, and moves on. The developing larva or pupa then sits in that sealed cell through the winter, entering its own form of diapause until spring warmth signals it to complete development and emerge as an adult.
Research on endoparasitoid wasps, species that develop inside the bodies of other insects, shows that their cold tolerance and diapause patterns often closely mirror those of their hosts. A study on three braconid wasp species that parasitize a fruit fly found that all three entered diapause at rates remarkably similar to the fly itself and survived exposure to temperatures as low as minus 20 degrees Celsius as long as their body fluids did not freeze. Prolonged chilling at 4 degrees Celsius for eight weeks or more was also well tolerated across species.8bioRxiv. Cold tolerance and diapause within and across trophic levels: endoparasitic wasps and their fly host have similar phenotypes This synchronization makes evolutionary sense: a parasitoid that emerged in February while its host was still dormant would have nothing to parasitize.
Mud daubers, potter wasps, and other solitary nest-builders leave behind small clay or mud structures that persist through winter. Unlike social wasp nests, these structures are built to last at least one season because their entire purpose is to protect the next generation during the months the mother is absent or dead. You might find a cluster of mud dauber tubes on a wall in your garage that looks unchanged from summer through winter; inside, the larvae or pupae are quietly waiting for warmth.
Should You Remove an Old Nest in Winter
If you find an exposed social wasp nest in winter, it is almost certainly dead. You can remove it without risk of stings, though wearing gloves is still sensible because the structure can harbor other insects, spiders, or mold. There is no practical reason you must remove it, either. A dead nest hanging from your eaves will not attract a new colony in spring; queens do not seek out old nests. Some people leave them in place specifically because they believe a visible nest deters other queens from building nearby, though the evidence for this deterrent effect is mostly anecdotal.
Nests inside wall voids or attic spaces are worth removing for a different reason: their papery material can attract dermestid beetles, carpet beetles, and other household pests that feed on the dead larvae and protein debris left behind. Moisture trapped in the nest material can also promote mold growth in enclosed spaces. If you are dealing with a large yellowjacket nest inside a wall, removal after the colony dies in late autumn is far easier and safer than trying to deal with it during peak summer activity.
One situation that genuinely calls for caution is a nest that appears inactive in early winter but is located in a climate where perennial colonies are possible. In the Deep South, parts of California, or coastal areas with mild winters, a yellowjacket nest that looks quiet on a cool morning may still contain thousands of living workers that are simply less active due to the temperature. Disturbing that nest can produce a fierce defensive response. If you are unsure whether a nest is truly dead, watch the entrance from a safe distance on a warm afternoon. Any traffic in and out means the colony is alive.
Fungal Threats to Overwintering Wasps
One underappreciated factor in winter wasp mortality is fungal infection. Entomopathogenic fungi, species that specifically target and kill insects, can infect both active colonies and dormant queens. A field study in New Zealand tracked hundreds of invasive paper wasp nests across two consecutive seasons and found that roughly 3.3 percent of nests in each season showed visible signs of fungal parasitism, with two fungal species (Beauveria malawiensis and Ophiocordyceps humbertii) accounting for most identified infections.9PubMed Central. Identity, Prevalence, and Pathogenicity of Entomopathogenic Fungi Infecting Invasive Polistes (Vespidae: Polistinae) Paper Wasps in New Zealand
While 3.3 percent might sound low, that figure reflects only visibly infected nests during the active season. Queens overwintering alone in damp hiding spots are arguably more vulnerable because the cool, moist conditions that many entomopathogenic fungi thrive in are exactly the conditions queens experience for months. A queen with a small fungal infection picked up in autumn may not succumb until the long weeks of dormancy give the fungus time to grow. Researchers studying invasive wasp populations have flagged these fungi as a potential biocontrol tool, since reducing queen survival over winter would directly reduce the number of new colonies founded the following spring.
For the casual observer, fungal infections are occasionally visible as a white or greenish fuzz on dead wasps found near old nests in late winter. These are usually species of Beauveria or Metarhizium, the same genera used in commercial bioinsecticide products for agricultural pests. The wasps you find in this condition were likely infected before or during their last days of activity and died as the fungus consumed their body tissues from the inside out. It is a grim end, but it is one of many natural checks on wasp populations that operate largely out of sight during the quiet winter months.