STINGING INSECT GUIDE

Paper wasp

Identification, local timing in San Antonio and the Hill Country, risk profile, and exactly how we treat it.

Scientific names: Polistes carolina (red paper wasp), P. exclamans (Guinea paper wasp), P. metricus (metric paper wasp), P. dominula (European paper wasp — invasive), P. fuscatus (northern paper wasp), P. apachus (Apache paper wasp). Common names: Paper wasp, umbrella wasp. Family: Vespidae (subfamily Polistinae). Status in the San Antonio / Boerne corridor: These wasps are native to the area, and we see multiple species. They're extremely common and account for most of the stinging insect calls we get.

At a glance #

Identification #

Paper wasps are what most folks think of when they hear "wasp." They have long, slender bodies with a noticeably narrow waist. Their legs hang down while they fly, unlike bees. You'll notice they fly slower and more deliberately compared to the quick, darting movements of yellowjackets.

The nest is the quickest way to identify a paper wasp. Look for a single comb of open hexagonal cells hanging down from a central stalk. There’s no paper envelope or enclosed football shape—those cells are clearly visible from underneath. If you can see those cells when you look up, you’ve found a paper wasp nest.

Multiple species live together in the San Antonio area, and locals often call them different things:

• Red wasp (Polistes carolina) — a solid reddish-brown body with smoky dark wings. This is the most common paper wasp around here, making up about 60–70% of all our "paper wasp" calls.
• Red wasp (alternate: P. perplexus) — looks similar but is less common in our area.
• Guinea paper wasp (P. exclamans) — smaller, with yellow markings, and often found on exposed structures like eaves and fences.
• Apache paper wasp (P. apachus) — a large yellow-and-brown species that's pretty common in the western half of Texas.
• Metric paper wasp (P. metricus) — stockier and darker; these guys often hide out in concealed spots.
• European paper wasp (P. dominula) — an invasive species that's yellow-and-black and somewhat resembles a yellowjacket; it's been around in Texas for several decades now.

Biology and behavior #

Colony founding — the "foundress" year #

Paper wasps follow a yearly cycle. In Central Texas, fertilized females, called foundresses, typically emerge from their winter hideouts in February or March. According to Texas A&M AgriLife Extension, if the winter is mild, they might show up even earlier. Once they’re out, a foundress searches for a good spot, begins building a new nest, and lays her eggs.

There are two strategies:

• Haplometrosis — a single foundress kicks off a nest all by herself. This is the go-to method for most Polistes species, including P. metricus and several others found in Texas.
• Pleometrosis — multiple foundresses, often sisters from the previous year’s nest, team up to start a nest. You’ll see this in P. carolina and it’s well-documented in P. dominula.

When multiple foundresses team up, they create a linear dominance hierarchy — a straightforward social order. The dominant foundress, often called the "alpha" queen, does most of the egg-laying and stays close to the nest. The subordinate foundresses handle more foraging and face greater risks. Throughout the season, as workers hatch and take over foraging duties, the alpha queen's hold on reproduction becomes even stronger.

Life cycle through the year #

In the San Antonio area:

• Feb–March: Foundresses wake up from hibernation, start looking for nest sites, and begin building their homes.
• April–May: First-brood larvae are growing. The queen feeds them chewed-up caterpillars and other soft-bodied insects.
• Late May–June: The first workers appear. These are the non-reproductive daughters of the foundress. They take over foraging, nest building, and caring for the brood. The nest expands quickly.
• July–August: The colony reaches its peak size. This is the most defensive time of the year and the highest risk for stinging incidents.
• September: The colony starts producing reproductive cells. New queens (future foundresses) and males begin to develop.
• October–November: New queens mate, while the males die off. The old foundress and the remaining workers die as temperatures drop.
• Late October onward: Mated new queens search for places to overwinter — attics, behind shutters, in gaps of siding, rolled-up patio umbrellas, and outdoor storage.

The old nest is never reused. This is important for treatment. If you kill the colony in September, it won't stop new nests from forming next year. New queens are already hibernating in different spots and will start building fresh nests come spring.

Food and ecological role #

Adult paper wasps sip nectar, but their larvae need animal protein to grow. They feast on caterpillars and soft-bodied insects that the worker wasps hunt down, chew, and then bring back to the nest. According to Purdue Extension, a thriving paper wasp colony can really help control caterpillar populations in your garden, taking out hundreds of tomato hornworms, cabbage loopers, and other pests throughout the season.

Agricultural extension services, including Texas A&M AgriLife, advise against killing paper wasp nests that are away from human activity. According to Texas A&M AgriLife Extension, these wasps are beneficial predators when they’re not buzzing around your doorframe.

Honey storage — a Polistes secret weapon for Texas #

Polistes annularis, a type of paper wasp found here in Texas, actually saves a little honey in some of its nest cells. I came across Joan Strassmann's 1979 paper in Science that spells it out clearly — "Honey caches help female paper wasps survive Texas winters." It's a fascinating survival strategy for these insects during the colder months.

Most paper wasp species don’t store food, but P. annularis is different. This species keeps nectar inside the nest to help the colony, especially the queen, survive short cold spells during winter. It’s a small but smart move for dealing with the unpredictable winters we often see in Central and South Texas.

Paper wasps recognize individual faces #

This is a fascinating discovery in the study of how invertebrates think, particularly when it comes to paper wasps.

Research by Elizabeth Tibbetts and Michael Sheehan at the University of Michigan, published in Science in 2011 and in Proceedings of the Royal Society B in 2021, found that **the northern paper wasp (Polistes fuscatus) can recognize the individual faces of other paper wasps, and they do it using holistic face processing** — the same way we humans and other primates recognize faces.

Key findings from the research:

• P. fuscatus wasps can learn to tell different wasp faces apart faster and with better accuracy than they can with non-face images.
• They use holistic processing — they recognize the whole face instead of just its parts, similar to how we do.
• Other related species like P. dominula and P. metricus don’t recognize individuals in the wild and cannot be trained to do this, despite having similar vision.
• P. fuscatus wasps have strong long-term memories — they can remember individual wasps for at least a week after just one meeting.
• Their face recognition relies on color — grayscale images of wasp faces don’t work because the yellow, brown, and black patterns hold the identity info.

The idea is that P. fuscatus needs this ability because several founding females compete to lead the colony. By remembering who has already won or lost, they establish a stable hierarchy. It's similar to a boarding school where everyone knows who got beaten last week, which prevents unnecessary fights down the line.

Paper wasp brains are less than one millionth the size of human brains, yet they can still recognize faces. It's impressive how such tiny brains can manage that!

Polistes fuscatus can be found in the eastern half of Texas, but it’s not the main player here. That title goes to the red paper wasp (P. carolina), which is what you'll mostly see in Central Texas. While fuscatus has a knack for face recognition, it’s a good reminder that the colony in your eave is smarter than most people think.

Local context — San Antonio and the Hill Country #

Paper wasps are easily the single most common stinging insect call we receive from San Antonio to Boerne to Kerrville. I've seen every home get at least one visit each season. In the Hill Country, homes with large outdoor areas often end up with multiple nests during the summer.

Where they build, by property type:

• Boerne historic district / Main Street (Hauptstrasse): Every eave along the downtown corridor. Those limestone buildings with deep-shaded eaves are perfect for nests.
  
• Fair Oaks Ranch and Dominion custom homes: Covered porches, outdoor kitchens, pergola cross-beams, and pool cabanas are all prime targets for stinging insects.
  
• Stone Oak / Cibolo Canyons: Patio umbrellas, especially the rolled-up ones, are where next year's queens love to overwinter. Playset canopies and outdoor bars are also popular spots.
  
• Bulverde / Spring Branch / acreage properties: Barns, sheds, and pole buildings are common nesting sites. It's not unusual to find multiple nests in one structure.
  
• New Braunfels / Gruene: Historic building eaves, outdoor venue pergolas, and live-music patios attract a lot of stinging insects.

A note on which species to expect locally #

• **Red paper wasp (P. carolina)** is the most common around San Antonio, especially northwest through Boerne and Fair Oaks Ranch. This species loves to build concealed nests—inside attic vents, in gable louvers, behind shutters, and in wall voids—more than any other.
• **Guinea paper wasp (P. exclamans)** prefers to nest in plain sight. You’ll find their hanging nests from eaves and soffits that are easy to spot from the ground.
• **Apache paper wasp (P. apachus)** is more prevalent in the western areas—like Kerrville, Comfort, and Fredericksburg.
• **European paper wasp (P. dominula)** is an invasive species that's been spreading through Texas. It deserves special mention because it often nests in odd places, like inside metal tubing and in ground cavities, which native paper wasps typically avoid.

Risk to humans and pets #

Moderate. A single paper wasp sting hurts. The Schmidt pain index gives paper wasps a 3.0 out of 4 — Justin Schmidt, who bravely tested stings for science, described a paper wasp sting as "caustic and burning, with a distinctly bitter aftertaste... Like spilling a beaker of hydrochloric acid on a paper cut." It’s not usually fatal, but it can be serious for those with allergies.

The higher-risk scenarios are:

• Mowing or trimming near an unseen nest — the vibrations can trigger a multi-sting defense from the insects.
• Moving a patio umbrella with a nest on the underside — you can almost count on getting stung.
• Opening a shed door with a nest on the inside — don't be surprised if you get a surprise visit from angry insects.
• Rolling out a fabric pool cabana or awning — these are popular spots for nesting.
• Reaching into a mailbox with a nest inside — it might sound funny, but this happens every year.

Treatment approach #

• Knockdown — Use an aerosol freeze product (pyrethrin-based) from a safe distance of 10–15 feet. It’s most effective at dusk or dawn when the workers are at the nest.
• Physical nest removal after knockdown is crucial. If you leave the nest, the larvae in the comb will keep developing. This step is often skipped by homeowners, leading to a DIY "spray" that results in a new colony in the same spot just two weeks later.
• Residual perimeter treatment on eaves, fascia, and common nesting areas during the March–May foundress period is key. This is the best time of year for prevention. Stopping a queen before she starts building is a lot easier than getting rid of an established colony.
• Attic and gable vent treatment is necessary for red paper wasps, which prefer hidden cavities.

New queens spend the winter in sheltered spots around your home. That's why sealing attic vents, siding gaps, and eave cavities in the fall and winter is a smart move. It can really help lower the number of colonies you’ll deal with next spring.

Odd, funny, and genuinely true #

• The paper in the nest is actually paper. Wasps scrape weathered wood fibers from fences, dead branches, and old wooden structures, mix the fibers with saliva, and chew the mixture into pulp. The resulting material is chemically and structurally almost identical to hand-made paper. Humans arguably invented paper-making by watching wasps — the Chinese eunuch Cai Lun, credited with inventing paper around 105 CE, is traditionally said to have been inspired by a wasp nest.
• A paper wasp colony can relocate its queen. If the dominant foundress is killed early in the season, a subordinate foundress can take over — nest usurpation and replacement have been documented in multiple Polistes species. The new dominant female destroys the old foundress's eggs and younger larvae and replaces them with her own.
• Paper wasps are territorial about specific spots. If you destroy a nest in a particular eave corner, next year's nest will very often be built on or within a few inches of the exact same spot. The location itself has the right microclimate, access, and shade — and foundresses evaluate sites using the same criteria year after year.
• The sting pain is worse when dry. Wasp venom contains kinins and phospholipases that work faster in low-humidity conditions. Central Texas summers — high heat, often dry afternoons — produce reliably painful paper wasp stings compared to wetter climates. This is not a myth; it's venom chemistry.
• Foundresses can be marked and tracked. Research wasps are painted with tiny dots of enamel paint on the thorax (each wasp gets a unique color combination). The paint doesn't harm them, and you can track individuals across a season by their "paint codes." This is how most of what we know about paper wasp dominance was figured out.
• A paper wasp queen who loses her nest can steal someone else's. Documented in P. biglumis and several other species — if her own nest is destroyed, she will sometimes invade a conspecific's nest, kill the resident foundress, and take over the colony. This is called intraspecific nest usurpation and is measurably more common in habitats with high predation pressure.
• Paper wasps will drink at puddles on hot days. Collecting water for evaporative cooling of the nest is a standard behavior — workers bring water back in their crops and regurgitate it onto the comb, where fanning wings cool the nest through evaporation. A hot Texas afternoon at a birdbath will typically include several paper wasps drinking alongside any other insects present.
• **The invasive European paper wasp (P. dominula) is genuinely replacing native species in some areas.** Studies from Ohio and other Midwestern states have shown P. dominula outcompeting and displacing P. metricus. In Texas the pattern is less clear but worth watching — invasive paper wasps are one of the more under-reported invasive species issues in the state.
• The Apache paper wasp (P. apachus, dominant in West Texas) has one of the larger colony sizes for the genus, sometimes approaching 250 adults — nearly yellowjacket-scale.
• Your hummingbird feeder is a paper wasp attractant. Sugar water in those feeders is valuable nectar to paper wasps. If you see paper wasps constantly hovering around a feeder, the fix is hardware — "bee guards" (small mesh screens fitted over the feeding ports) — not insecticide.

Common questions customers ask #

• How do I get rid of wasps on my porch?
• What are those reddish wasps on my house?
• When are wasps most aggressive in Texas?
• Can I spray a wasp nest at night?
• What's the difference between paper wasps and yellowjackets?
• Will wasps come back after I knock the nest down?
• Are paper wasps good for my garden?
• How do I stop paper wasps from building on my eaves?

We’ve looked at a lot of research to put together this information. Key sources include studies on Polistes face recognition (Sheehan & Tibbetts 2011, Science; Tibbetts et al. 2021, Proceedings of the Royal Society B), Strassmann's 1979 Science article about Polistes annularis honey caching, and research on colony founding (Makino & Sayama, Pickett & Wenzel). We also relied on Texas A&M AgriLife Extension species accounts and the Schmidt Sting Pain Index (Schmidt et al., various publications). The regional species distribution is based on AgriLife's Field Guide to Common Texas Insects.

Frequently asked questions #

How can I identify a paper wasp? #

Paper wasps are typically slender with long legs and have a distinctive hourglass shape in their coloration, which ranges from brown to yellow. They are often mistaken for yellowjackets, but paper wasps have longer bodies and less aggressive behavior.

What should I do if I find a paper wasp nest near my home? #

If you spot a paper wasp nest, it's best to avoid disturbing it. Paper wasps can become aggressive if they feel threatened, especially during the late summer when their colonies are at their largest. I recommend calling us for safe removal.

When are paper wasps most active in San Antonio? #

In San Antonio, paper wasps start becoming active in the spring as temperatures warm up and can be a problem through late fall. Their colonies usually reach peak size in late summer, so that's when you'll likely see the most activity.

What is your process for treating a paper wasp infestation? #

Our treatment process involves a thorough inspection to locate the nests, followed by targeted treatment that is safe for your property. We use professional-grade products to eliminate the wasps while minimizing risk to you and your pets.

How much does paper wasp removal cost, and how long does it take? #

The cost of paper wasp removal can vary depending on the size and number of nests we need to address. Typically, treatments can be completed within a couple of hours, and we'll provide you with a clear estimate after our initial assessment.

Last reviewed April 25, 2026 by Travis Lambert (Owner).