Quick answer
A wasp nest is the shelter wasps build to raise their young, usually from paper they make by chewing wood fiber with saliva, or from mud in the case of solitary mud daubers.
Its shape tells you which wasp built it and how risky it is: an open umbrella of cells is a paper wasp nest; a closed gray ball or a hole in the ground usually means yellowjackets.
Quick facts
The key facts about Wasp Nest, with sources:
- Built from
- Wood fiber mixed with saliva (paper), or mud for mud daubers 1
- Founded by
- A single mated queen in spring 1
- Paper wasp colony
- 15–200 wasps; nest rarely bigger than a hand 1
- Yellowjacket colony
- 1,500–15,000 wasps, by species 1
- Bald-faced hornet nest
- Up to 3 feet long with 2–4 combs 4
- Most defensive time
- Late summer and fall, as colonies peak and food runs short 1
Key takeaways
- The nest’s shape and spot tell you the wasp: open umbrella, closed paper ball, hole in the ground or mud tubes.
- Ground and wall nests built by yellowjackets carry the highest sting risk and are best left to a professional.
- Most paper nests are used for only one season and are empty by winter.
- A small paper wasp nest far from doors and paths can often be left alone, since the wasps eat garden pests.
- Never seal a wall-void nest from inside the house; wasps may chew through into a room.
A wasp nest in plain terms
A wasp nest is a nursery, packed with six-sided cells that each hold an egg, a white grub-like larva or a pupa, while adult workers bring food back to feed the young 1.
Social wasps, such as paper wasps and yellowjackets, make “paper,” which means they scrape fibers from wood, chew them with saliva and shape the pulp into cells 1. Some leave the cells open to the air, while others wrap the combs in a gray paper shell with one entry hole 1.
Mud daubers are solitary wasps that build small, hard mud nests on walls and ceilings, and one female tends each nest, and they rarely sting 1.
Wasps are useful, and UC IPM notes social wasps kill large numbers of plant-eating insects and nuisance flies 1. A nest becomes a pest problem when it sits where people walk, work or play.
Wasp nest or beehive?
Honey bees build wax comb, not paper, and often nest inside tree or wall cavities 1. A wax comb or a hanging cluster of fuzzy bees is a bee issue. Bees are handled by relocation, not by killing the colony; see our honey bee page under related terms.
How a wasp nest grows through the year
Paper wasp and yellowjacket nests follow the same yearly cycle 13.
- Late winter to spring: the queen starts alone. A mated queen that spent the winter hidden comes out, feeds and builds a few cells 1.
- Spring to midsummer: growth. The first workers hatch and take over building and feeding, and because the larvae need lots of protein, so workers hunt insects 1.
- Late summer: peak size. Growth slows as workers switch to seeking sugar, and wasps show up at drinks, fruit and trash 1.
- Fall: most defensive. Colonies are largest and food is scarce, so defense rises as the season goes on 1.
- Winter: the colony dies. Workers die off while new queens leave to spend winter hidden, and the old nest is not reused 13.
- Queen emergesLate winter to early spring
- FoundingQueen builds first cells alone
- GrowthWorkers hunt insects for protein
- PeakLate summer; workers seek sugar
- DeclineFall; most defensive
- New queens overwinterOld nest abandoned
- Back to step 1
This is why early-season nests are small and quiet, and fall nests are large and touchy. Source: [1] [3]
UC IPM notes that in very mild winters some yellowjacket colonies survive for several years and grow very large 1.
Types of wasp nests and how to tell them apart
| Nest type | What it looks like | Where you find it |
|---|---|---|
| Paper wasp | Open, umbrella-shaped comb on a stalk; cells visible from below; rarely larger than an outstretched hand 1 | Eaves, attics, play equipment, benches, hollow pipes, tree branches 31 |
| Ground yellowjacket | A hole in the ground with wasps flying straight in and out; paper combs inside a paper shell 1 | Old rodent burrows, rotted stumps 1 |
| Wall-void yellowjacket | Wasps entering a gap in siding or trim; sometimes a wet patch or hole in drywall 1 | Walls and ceilings of houses 1 |
| Aerial yellowjacket or bald-faced hornet | Gray, closed paper ball or football with one hole near the bottom 14 | Eaves, trees and shrubs; up to 3 feet long for hornets 4 |
| Mud dauber | Small, hard tubes or lumps of mud 1 | Ceilings, walls and sheltered corners 1 |
Our insect identifier helps when you can see the wasp but not the nest.
Example: two nests on the same house
This compares two common finds using UC IPM’s published colony sizes, as an illustration of scale, not a count of any real nest.
| Feature | Paper wasp nest under the eave | Yellowjacket nest in a wall |
|---|---|---|
| Colony size | 15–200 wasps 1 | 1,500–15,000 wasps 1 |
| Can you see the cells? | Yes, open from below 1 | No, they are inside a paper shell, inside the wall 1 |
| Defense | Rarely aggressive unless near doors or busy spots 1 | Defend vigorously when disturbed 1 |
| Can it be reached? | Usually, if low | Removal is not practical; nests are hidden 1 |
| Sensible action | Leave it if out of the way; call a pro if it is over a door | Call a licensed pro |
At the top of those ranges, the wall nest can hold dozens of times more wasps than the eave nest, so the visible nest is not always the bigger problem.
Where “wasp nest” shows up on paperwork
On a service ticket, the technician should note the nest type, its location (eave, soffit, wall void, ground, shrub) and how it was handled. A note like “wall void, entry at the second-floor trim” tells you where to watch for new activity.
On a quote, stinging insect work is often priced as a separate service from general pest control, so read whether nest removal, a follow-up visit and sealing the entry hole are included. Our contract checklist shows what each line should say.
On a product label, a nest spray must list wasps, hornets or yellowjackets as target pests and say where the product may be used 5.
On a home inspection or rental move-in sheet, a nest near an entry may be flagged as a safety item for the owner to fix.
Leaving a nest vs having it removed
Reasons to leave it
Reasons to have it removed
- Nests over doors, windows or busy paths raise the chance of stings 1.
- Yellowjackets defend their nests vigorously and get more defensive into fall 1.
- A wall nest can chew through into a room, as UC IPM describes wet patches turning into holes 1.
- Anyone in the home with a sting allergy faces a medical risk, not just discomfort 2.
Why nest control is harder than it looks
Many nests are out of reach, and UC IPM says removing subterranean or cavity nests is not practical because they are underground or hidden 1. The entry hole can also be far from the comb itself.
Sprays do not stop every wasp, and UC IPM warns that wasps attack when they sense a spray, that even “freeze” products do not stop all of them, and that agitated wasps can still be around the next day 1.
Traps reduce foragers, not nests, because lure traps cut the number of yellowjackets around a patio but do not get rid of large populations 1. Reliable yellowjacket bait products were taken off the market in the early 2000s 1.
What drives the cost of nest removal
We do not quote prices, because a fair number needs many dated local quotes, but these are the factors that move it.
Location matters most, since a low, open paper wasp nest is quick while a nest high on a second-story eave needs ladders or lifts.
A wall-void or ground nest takes more time, protective gear and often a return visit. The type of wasp matters next, since yellowjacket and hornet nests need more care. Sealing and repair of the entry point add labor and materials.
Urgency adds cost too, because same-day calls in peak season can be priced higher. Our pest control cost guide explains how quotes are built, and the stinging insect removal service page outlines what a job covers.
Nests do not have a lifespan beyond one season, but the work can carry a guarantee, so ask whether a return visit is free if wasps are still active after a few days.
How a professional handles a wasp nest
- Identify the builder. The technician checks the nest and the wasps, so bees are not treated as wasps and the right method is used 1.
- Find the real nest. For wall and ground nests, they watch where wasps fly straight in and out 1.
- Time the visit. Wasps are most likely to be home at night, when the whole colony can be treated at once 1.
- Treat or remove. A licensed applicator uses a product labeled for the nest type and site, in full protective gear 15.
- Wait, then remove. Once activity stops, reachable nests are taken down, and the spot is cleaned of comb and debris.
- Seal and follow up. Wall entry holes are sealed only after the colony is dead, so trapped wasps do not chew indoors, and a return visit checks for stragglers.
Do not knock, burn, flood or block a nest
Disturbing a nest triggers mass defense, and many stings at once can cause kidney damage days later 12. Leave the area if wasps start stinging.
Get emergency care (911) for trouble breathing, swelling of the face or throat, dizziness or a sting in the mouth or neck 2. For a pesticide exposure, call Poison Help at 1-800-222-1222 6.
In some parts of California, a local mosquito and vector control district may remove nests, UC IPM notes 1, while elsewhere you should choose a state-licensed company; our page on pest control licensing explains what to check.
Keeping new nests from starting
- Walk the house in early summer and again through fall, looking under eaves, decks, play sets and railings 3.
- Keep window screens tight and close gaps in siding, soffits and trim where wasps could enter a wall 3. Our page on caulking to keep pests out covers sealing.
- Keep food, pet food and drinks covered outdoors, and keep trash in sealed cans that are emptied often 1.
- Pick up fallen and overripe fruit, which draws foraging yellowjackets in late summer 1.
- Cap or plug open pipes, fence posts and play-set tubes, which paper wasps use 3.
Small and early is easier
UC IPM notes that a newly started paper wasp nest has little activity, and the founding queen will move elsewhere if it is lost early 1. Spring checks catch nests before colonies grow.
The seasonal pest calendar shows when to look, and the home pest risk checklist covers other entry points.
Signs of a nest you cannot see
These clues point to a hidden nest, so call a professional rather than hunt for it yourself.
- Wasps flying straight in and out of one spot in the ground or a building 1.
- Wasps appearing inside the house, especially near light fixtures or windows, can mean a nest in the wall.
- A soft, wet or darkening patch on a ceiling or wall, which can become a hole 1.
- A steady stream of wasps around trash or food late in summer, a sign of a large colony nearby 1.
- Stings or swarming when someone mows or trims near a shrub or bank point to a ground nest.
Rules that cover nest treatment
Federal label law. The EPA registers pesticides under FIFRA, and label requirements are in 40 CFR Part 156. Using a product “in a manner inconsistent with its labeling” is a federal violation 5, so a nest product may be used only on the pests and sites the label names.
State licensing. People who apply pesticides for hire must be licensed by their state, and you can check a company with the license lookup tool.
Bees are a separate case. If the “wasps” turn out to be honey bees, a beekeeper or bee removal service may be the right call. Rules on bee removal vary by state; we did not verify a single national rule.
See our pesticide safety guide for label basics and safe storage.
Wasp nest vs beehive vs hornet nest
| Feature | Paper wasp nest | Yellowjacket or hornet nest | Honey bee hive |
|---|---|---|---|
| Material | Paper, open cells 1 | Paper inside a closed shell 14 | Wax comb |
| Typical spot | Under eaves and rails 3 | Ground, walls, trees and eaves 1 | Tree or wall cavities 1 |
| Colony life | One season 3 | One season, usually 1 | Lives through winter |
| Stinger | Not barbed; can sting again 1 | Not barbed; can sting again 1 | Barbed; stays in skin 2 |
| Usual response | Leave or remove if near people | Professional treatment | Relocation by a beekeeper |
Wasp nest myths
- Myth Wasps reuse last year’s nest.
- Reality Most colonies live one season; new queens start fresh nests in spring 13.
- Myth Sealing the entry hole will kill a wall nest.
- Reality Trapped wasps can chew through the wall into the house; UC IPM describes their digging making holes in walls and ceilings 1.
- Myth Night spraying is safe.
- Reality UC IPM says stings are still likely even after dark with long-range sprays 1.
- Myth Traps will get rid of the nest.
- Reality Lure traps reduce foragers but do not eliminate large populations 1.
- Myth All wasps are aggressive.
- Reality Paper wasps are rarely aggressive and mud daubers rarely sting; yellowjackets are the main problem 1.
Regional differences that change the plan
Wasp nests are found across the U.S., but who removes them and which species build them varies.
In parts of California, the local mosquito and vector control district may remove nests, and UC IPM points residents to the Mosquito & Vector Control Association of California to check 1.
In Texas, Texas A&M notes the bald-faced hornet is the only “hornet” known in the state, and it is really a type of yellowjacket 4.
UC IPM also reports that in very mild winters, some yellowjacket colonies survive for several years and grow huge, which matters more in warm regions 1.
When it matters to you, and what to do next
Ask three questions before you act. Is it near a door, path, play area or window? Is it a closed nest, a ground hole or in a wall? Does anyone in the home have a sting allergy?
A “yes” to any of these means call a licensed professional. A small, open paper wasp nest high and out of the way can usually be left until it dies off in winter.
When you call, describe the nest shape and location so the company sends the right gear, and ask whether the price includes a return visit and sealing. Our guide on how to choose a pest control company lists more questions.
Quick decision guide
Leave an open paper nest that is out of the way. Call a pro for any nest near doors or play areas, and for any ground, wall or closed paper nest.
If someone in the home has a sting allergy, call a pro and keep that person away. Call a beekeeper for wax comb or a bee cluster.
Questions about Wasp Nest
How can I tell what kind of wasp nest I have?
Look at the shape and the spot first. An open, umbrella-shaped comb with visible cells hanging from eaves or rails is a paper wasp nest.
A gray, closed paper ball with one hole near the bottom is a yellowjacket or bald-faced hornet nest.
Wasps flying in and out of a ground hole or a wall gap mean yellowjackets, while small hard mud tubes belong to mud daubers.
Do wasps come back to the same nest?
No, most do not, because yellowjacket and paper wasp colonies usually live for one season. In fall the workers die and new queens leave to spend the winter hidden, then start fresh nests in spring.
UC IPM notes that in very mild winters some yellowjacket colonies survive for several years, and an empty old nest can be taken down in winter.
Should I remove a wasp nest myself?
For yellowjacket, hornet, wall or ground nests, no, because UC IPM says calling a professional is the easiest and safest option, because wasps attack when they sense a spray and stings are likely even at night.
A small, open paper wasp nest far from people can often be left alone, but anyone with a sting allergy should stay well away.
When are wasps most aggressive?
Wasps are most defensive in late summer and fall, and UC IPM explains that colonies are at their largest then, while food is getting scarce, so defense increases as the season goes on.
This is also when yellowjackets show up at picnics, drinks and trash cans looking for sugar, while spring nests are small and much quieter.
What happens if I block a wasp nest hole in my wall?
Blocking the entrance of an active wall nest can push wasps to chew their way inside the house.
UC IPM describes yellowjackets enlarging cavities and making wet patches that become holes in walls or ceilings.
Have the colony treated first, wait until activity stops, then seal the opening so new queens cannot use it next year.
How big can a wasp nest get?
It depends on the species, and UC IPM says paper wasp nests rarely get bigger than an outstretched hand and hold 15 to 200 wasps, while yellowjacket colonies reach 1,500 to 15,000 wasps.
Texas A&M says bald-faced hornet nests can reach 3 feet long with 2 to 4 combs. In mild winters, some yellowjacket nests survive and grow much larger.
Is a wasp nest the same as a hornet nest?
A hornet nest is one kind of wasp nest, and in the U.S., the bald-faced hornet is actually a type of yellowjacket, according to Texas A&M. It builds a closed, gray paper nest with an entrance near the bottom, often in trees or under eaves.
Paper wasps build open nests without a shell, and other yellowjackets often nest underground.
What should I do if I get stung by a wasp?
Move away from the nest first, then wash the sting and use a cold pack to ease pain. Wasp stingers are not barbed, so there is nothing to remove.
Get emergency care at once for trouble breathing, swelling of the face or throat, dizziness, or a sting in the mouth or neck. People stung many times should see a doctor, since kidney problems can appear days later.
Are wasp nests good for anything?
Yes, because social wasps hunt large numbers of plant-eating insects and nuisance flies, UC IPM notes, and it recommends protecting them where they nest away from people and animals.
A paper wasp nest on a far fence or tree is often a garden helper, and the problem is only nests where people walk, play or work.
When is the best time to check for wasp nests?
Check in late spring and early summer, when nests are small, and keep checking into fall, as Utah State Extension advises monitoring from early summer through fall. Look under eaves, decks, railings, play equipment and inside open pipes. Small nests found early are much easier and safer to deal with than large fall colonies.
Sources
- UC Statewide IPM Program, Pest Notes: Yellowjackets and Other Social Wasps (Publication 7450), retrieved .
- UC Statewide IPM Program, Pest Notes: Bee and Wasp Stings (Publication 7449), retrieved .
- Utah State University Extension, Paper Wasps, retrieved .
- Texas A&M AgriLife, Texas Apiary Inspection Service, Hornets, retrieved .
- U.S. EPA, Introduction to Pesticide Labels, retrieved .
- National Capital Poison Center, About Poison Control (1-800-222-1222), retrieved .
Expert review
Written by the HyrePest Research team. Not yet reviewed by an outside expert. We say so rather than imply a review that has not happened; see our editorial policy.
How the numbers were checked: Nest types, colony sizes, the seasonal cycle, defense and control limits follow UC IPM Pest Notes 7450. Sting and multiple-sting risks are from UC IPM Pest Notes 7449.
Paper wasp habits are from Utah State Extension and hornet nest size from Texas A&M AgriLife. Label law is from the EPA. No prices, products, application rates or do-it-yourself nest removal steps are given.
Suggest a correction. We fix errors and say what changed.