25 Different Types of Wasps: From Backyard Paper Wasps to Desert Tarantula Hawks
October 24, 2026
Most people lump every black-and-yellow flying insect into one mental category labeled “wasp” and then avoid it on sight. That instinct skips over an enormous amount of variety: wasps range from inch-long hunters that paralyze tarantulas to pinhead-sized parasitoids that keep crop pests in check without a single human noticing. Understanding the different types of wasps that live across the United States makes it much easier to know which ones deserve a wide berth and which ones are quietly doing useful work in the yard.
This wasp identification guide covers 25 species and species groups, organized loosely from the social colony-builders most people recognize to the solitary hunters and tiny parasitoids most people have never heard of. Along the way, it breaks down solitary vs social wasps, regional distribution, and the behaviors that actually matter for anyone trying to tell one from another in the field.
| Lifestyle | Nesting Behavior | Example Species | Typical Sting Risk |
|---|---|---|---|
| Social | Shared paper or mud nests built by a queen and worker caste | Paper wasps, yellowjackets, hornets | Higher near the nest; workers defend it aggressively |
| Solitary | Individual burrows, mud cells, or cavities provisioned by a single female | Mud daubers, cicada killers, spider wasps | Low; females rarely sting unless handled |
That split between social and solitary species explains most of the behavioral differences covered in this guide, so it’s worth keeping in mind as each type of wasp comes up below.
1. Paper wasps
Paper wasps belong to the genus Polistes, and they get their name from the papery, umbrella-shaped nests they build out of chewed wood fiber and saliva. Unlike yellowjackets, their nests have open, exposed combs with no outer envelope, which makes the hexagonal cells easy to spot under eaves, deck railings, and porch ceilings.
These are social wasps with small colonies, often just a few dozen workers, led by one or more founding queens. They spend much of their day hunting caterpillars and other soft-bodied insects to feed their larvae, which makes them useful allies in a vegetable garden working alongside predators like the different types of ladybugs that also patrol for pests. Paper wasps are generally not aggressive unless the nest itself is disturbed, but a direct hit on the comb can bring the whole colony out at once.
2. Yellowjackets
Yellowjackets, mostly in the genera Vespula and Dolichovespula, are the wasps responsible for the most late-summer picnic encounters in the United States. They build enclosed paper nests, often underground in abandoned rodent burrows or inside wall voids, with a papery outer envelope hiding tiers of combs inside.
Colonies can grow into the thousands of workers by late summer, which is exactly when yellowjackets become most noticeable, as they shift from hunting insects to scavenging sugary drinks and proteins at outdoor gatherings. They are far more defensive than paper wasps and can sting repeatedly without losing their stinger, which is why disturbed nests near structures are usually best left to a pest control professional.
Pro Tip: If a yellowjacket lands on food or a drink, resist swatting at it. Slow, steady movement away from the insect is far less likely to trigger a defensive sting than sudden motion.
3. Bald-faced hornets
Despite the common name, bald-faced hornets are not true hornets at all; they are a type of aerial yellowjacket in the species Dolichovespula maculata. They are easy to recognize by their black-and-ivory-white markings and the large, gray, football-shaped paper nests they build high in trees, on utility poles, or under roof eaves.
Colonies can hold several hundred workers by autumn, and bald-faced hornets have a reputation for aggressively defending their nest, sometimes spraying venom toward a perceived threat’s eyes. They prey heavily on flies and other wasps, including yellowjackets, which gives them a useful role in controlling other stinging insect populations even as they make the yard around their nest a no-go zone for people.
4. European hornets
European hornets (Vespa crabro) are the only true hornet species established in the eastern United States, having been introduced from Europe in the 1800s. They are large, reddish-brown and yellow insects that nest in hollow trees, wall cavities, and other sheltered spaces rather than building exposed paper nests like paper wasps.
One distinguishing habit is their activity after dark; European hornets will fly at night and are sometimes drawn to porch lights, unlike most other social wasps that shut down activity at dusk. They do sting when threatened, but colonies tend to be smaller than yellowjacket nests, and workers are generally less inclined to chase intruders far from the nest site.
5. Asian giant hornets
The Asian giant hornet, Vespa mandarinia, is the largest hornet species on the planet, with queens reaching up to about 5 centimeters in length. Adults measure approximately 3.5–5.0 cm in length, with queens reaching up to 5 cm. The species is formerly called the Asian giant hornet and sometimes sensationalized as the “murder hornet,” native to East and Southeast Asia, and entomologists now generally refer to it as the northern giant hornet.
A small number of these hornets were detected in Washington State and nearby British Columbia starting in 2019, raising concern because the species poses significant threats to European honey bee colonies through coordinated group attacks. The outcome of that incursion is a genuine conservation success story worth noting for anyone who still associates this species with an active U.S. threat.
Important Note: After every known nest was destroyed and no hornets were seen for three years, the United States declared the species eradicated in December 2024, so it is not established in North America today. Any hornet matching this description in the U.S. is far more likely to be a native cicada killer or European hornet.
6. Mud daubers
Mud daubers are solitary wasps that build small tube- or pot-shaped nests out of mud, often tucked under eaves, in garages, or beneath bridges. The black-and-yellow mud dauber, the organ-pipe mud dauber, and the all-metallic-blue mud dauber are the three species most commonly seen across the United States.
Each female hunts spiders, paralyzes them with a sting, and packs several into a single mud cell before sealing it with an egg inside. Mud daubers are strikingly docile; because they live alone with no colony to defend, they almost never sting people even when their nests are handled directly, making them one of the more harmless types of wasps and behavior-wise an easy one to simply leave in place.
7. Potter wasps
Potter wasps, a subfamily within the Eumeninae, earn their name by molding tiny mud nests shaped like miniature clay jugs or vases, often attached to twigs or fences. A single female builds and provisions each pot by herself, stocking it with paralyzed caterpillars before sealing an egg inside and moving on to the next one.
These solitary wasps rarely interact with people and lack the colony-defense instinct that makes social species dangerous. Gardeners often benefit from potter wasps without realizing it, since the caterpillars gathered to provision each nest are frequently species that would otherwise damage leafy vegetables and ornamentals.
8. Mason wasps
Mason wasps are close relatives of potter wasps within the same Eumeninae subfamily, but instead of building their own mud pots, they nest inside existing cavities such as hollow plant stems, old beetle borings, or abandoned bee tunnels. They partition the cavity into separate cells with mud walls, each stocked with paralyzed caterpillars or beetle larvae for a single offspring.
Identification can be tricky in the field because mason wasps vary widely in color pattern, some combining black with red, white, or yellow stripes that don’t always match a textbook description. Like other solitary wasps on this list, mason wasps are not prone to stinging people and spend most of their short adult lives hunting rather than defending territory.
9. Cicada killers
Cicada killers (Sphecius speciosus) are among the largest wasps found in North America, sometimes approaching two inches in length, which makes them alarming to encounter despite being almost entirely harmless to people. Females dig burrows in sandy or well-drained soil, often in lawns, golf courses, and garden beds, and provision each chamber with a paralyzed cicada for their larvae.
Males patrol territory around the burrows and can look aggressive as they dive at passersby, but they lack a stinger entirely and are incapable of harming anyone. The main nuisance cicada killers cause is cosmetic lawn damage from their tunneling, particularly in dry, sunny patches of turf where the soil is easiest to excavate.
10. Great golden digger wasps
Great golden digger wasps (Sphex ichneumoneus) are solitary hunters named for the golden hairs covering their thorax and the upper part of their abdomen. They dig branching underground burrows in sandy or loose soil, with each branch ending in a cell provisioned with paralyzed katydids or crickets.
Adults are frequently seen nectaring on flat-topped flowers like mountain mint and Queen Anne’s lace, making them valuable pollinators alongside their pest-control role. Despite their large size, they have a mild temperament and are considered one of the safer solitary wasps to observe up close in a garden setting.
11. Great black wasps
The great black wasp (Sphex pensylvanicus) is a large, uniformly black solitary wasp with smoky, dark-tinted wings that catch a faint blue or purple sheen in sunlight. Like its golden-haired cousin, it digs ground burrows and hunts grasshoppers and katydids, dragging paralyzed prey back to provision each cell.
Great black wasps are frequent visitors to milkweed and other late-summer wildflowers, where they feed on nectar and incidentally help with pollination. They are not aggressive toward people and typically only sting if physically grabbed or stepped on barefoot.
12. Sand wasps
Sand wasps make up the subfamily Bembicinae, a group of solitary ground-nesters that dig burrows in loose, sandy soil, frequently in aggregations where dozens of females nest within a few feet of one another despite each provisioning her own burrow independently. Most species specialize in hunting flies, which they paralyze and carry back to the nest for their larvae.
The large aggregations can look like a swarm to the untrained eye, which sometimes causes unnecessary alarm at beaches or sandy ballfields. In reality, sand wasps are focused entirely on their burrows and rarely pay any attention to nearby humans.
13. Spider wasps
Spider wasps make up the family Pompilidae, a large group of solitary hunters united by one shared behavior: every species preys exclusively on spiders to provision its nest. Most spider wasps are dark-colored with long legs and smoky or amber-tinted wings, and many can be seen running rapidly across the ground or low vegetation while searching for prey rather than flying in a direct line.
Family members range dramatically in size, from species barely a quarter-inch long that take on small jumping spiders up to the giants of the group covered next, which specialize in tarantulas many times their own body weight.
14. Tarantula hawk wasps
Tarantula hawks, mostly in the genus Pepsis, are the largest members of the spider wasp family and among the largest wasps found anywhere in the Americas. They are easily recognized by their robust, iridescent blue-black bodies and shiny orange wings, and female Pepsis grossa measure 1.5 to 2 inches in body length.
A female locates a tarantula at its burrow, and stings it between the legs, paralyzing it, and then drags the prey to a specially prepared burrow, where a single egg is laid on the spider’s abdomen. Adult tarantula hawks are nectarivorous, getting most of their energy from pollen and nectar, and serve as important pollinators for the desert plants they visit.
Key Insight: On the Schmidt Pain Index, the tarantula hawk wasp earns a level 4 rating, the second highest possible, with entomologist Justin Schmidt describing the sensation as “blinding, fierce, shockingly electric. A running hair drier has just fallen into your bubble bath.” The good news is that tarantula hawks are not aggressive toward humans and pets and will rarely sting unless provoked.
15. Thread-waisted wasps
Thread-waisted wasps, a group that includes genera like Ammophila, are instantly recognizable by the extremely narrow, stalk-like connection between their thorax and abdomen, far more pronounced than the waist seen in most other wasps. Most are solitary hunters that provision burrows or mud cells with paralyzed caterpillars for their larvae.
Some species exhibit a behavior entomologists call tool use, picking up a small pebble in their mandibles and using it to tamp down soil over a sealed burrow entrance. That kind of problem-solving is rare among insects and makes thread-waisted wasps a favorite subject for researchers studying insect behavior.
16. Cuckoo wasps
Cuckoo wasps, family Chrysididae, are some of the most visually striking insects in this entire list, with bodies that shine in metallic emerald, ruby, and sapphire tones under sunlight. Rather than hunting prey themselves, most species are parasitoids or kleptoparasites that sneak their eggs into the nests of other solitary wasps and bees, where their larvae consume the host’s stored food or the host egg itself.
Because they regularly invade other wasps’ nests, cuckoo wasps have evolved a defense mechanism: a concave underside that lets them curl into a tight, armored ball if the host wasp returns and attacks. They lack the ability to sting painfully, so this defensive curling is essentially their only protection.
17. Velvet ants (wingless wasps)
Velvet ants, family Mutillidae, are not ants at all but wingless female wasps covered in dense, brightly colored hair that gives them their name. Males of the same species have wings and look quite different, which has led to a fair amount of historical confusion about which sexes belong together.
Several species carry the nickname “cow killer” thanks to an exceptionally painful sting, even though the sting itself causes no lasting damage and is rarely medically serious. Velvet ants are parasitoids that invade the underground nests of ground-nesting bees and wasps, where the female lays an egg that develops at the host’s expense; gardeners who also watch for insect-eating different types of hedgehogs in their yard may notice both predators patrolling the same sandy, open ground these wasps favor.
18. Pollen wasps
Pollen wasps, subfamily Masarinae, break the standard wasp mold in one major way: instead of provisioning their nests with paralyzed insects, they gather pollen and nectar much like bees do, mixing the two into a paste to feed their larvae. This unusual diet makes them an evolutionary bridge of sorts between predatory wasps and pollen-collecting bees, a distinction worth noting alongside the broader world of pollinators covered in guides to different types of beehives and managed pollinator housing.
Most pollen wasp species are solitary, nesting in mud cells, existing cavities, or small burrows depending on the species. They tend to be uncommon and easily overlooked, in part because their yellow-and-black banding causes casual observers to mistake them for small paper wasps or bees.
19. Ichneumon wasps
Ichneumon wasps, family Ichneumonidae, make up one of the largest animal families on Earth, with tens of thousands of described species and likely many more awaiting formal identification. Nearly all are parasitoids, meaning the female lays an egg in or on a host insect, usually a caterpillar or beetle larva, and the developing wasp larva slowly consumes the host from within.
Many species sport a long, needle-like ovipositor used to reach hosts buried inside wood or soil, and this structure is sometimes mistaken for a dangerous stinger even though ichneumon wasps pose essentially no sting risk to people. Their role as natural pest regulators makes them one of the most ecologically important groups on this entire list, even though almost nobody notices them doing it.
20. Braconid wasps
Braconid wasps, family Braconidae, are close relatives of ichneumon wasps and share the same parasitoid lifestyle, though most braconids are considerably smaller. Anyone who has grown tomatoes has likely seen their handiwork directly: a hornworm covered in small white cocoons has been parasitized by braconid wasp larvae that fed inside the caterpillar before pupating on its skin.
That same biology makes braconid wasps one of the most widely used biological control agents in commercial agriculture, since farmers can release them to suppress caterpillar pests without broad-spectrum pesticides. A caterpillar carrying braconid cocoons should always be left alone in the garden, since killing it also kills the wasps actively working to control the next generation of pests.
21. Gall wasps
Gall wasps, family Cynipidae, are tiny insects best known not for their own appearance but for the strange plant growths, called galls, that form around their developing larvae. Most species target oak trees, though some affect roses and other plants, and each gall wasp species tends to produce a gall with a distinctive shape, size, and color.
Many gall wasps have complex life cycles that alternate between a sexual generation and an asexual generation, each producing a different type of gall on the same host plant in the same year. Despite the sometimes dramatic appearance of a gall-covered branch, these wasps rarely cause serious harm to a healthy, mature tree.
22. Fig wasps
Fig wasps, family Agaonidae, are bound to fig trees in one of the most specialized partnerships found anywhere in the insect world. A female fig wasp squeezes into a developing fig through a tiny opening, often losing her wings and antennae in the process, then pollinates the flowers inside while laying her own eggs.
Neither partner can complete its life cycle without the other: the fig tree depends on the wasp for pollination, and the wasp’s offspring depend entirely on that specific fig species for food and shelter. This arrangement is one of the clearest examples of the kinds of different types of mutualism between animals found in nature, and it has shaped the evolution of both fig trees and fig wasps for tens of millions of years.
23. Chalcid wasps
Chalcid wasps make up the superfamily Chalcidoidea, an enormous and varied group of mostly tiny wasps, some barely visible without magnification. Like ichneumon and braconid wasps, most chalcids are parasitoids, but they target an unusually wide range of hosts, including other parasitoid wasps, scale insects, and even the eggs of moths and beetles.
Several chalcid species are mass-reared and released commercially for biological pest control in greenhouses and row crops, since their small size lets them search out hosts hidden deep in plant tissue. Their diversity and sheer abundance make chalcid wasps one of the most important, if least recognized, groups among all the different types of insects contributing to natural pest suppression.
24. Horntails (wood wasps)
Horntails, family Siricidae, look distinctly different from the rest of this list because they lack the narrow wasp waist entirely, giving them a cylindrical, almost fly-like body shape. Females have a long, spike-like ovipositor used to drill into tree bark and deposit eggs directly into the wood, a boring habit that brings them into the same ecological space as wood-damaging insects like the different types of termites homeowners already watch for.
Horntail larvae tunnel through wood for one to two years before emerging as adults, usually targeting stressed, dying, or recently cut trees rather than healthy ones. Despite their intimidating ovipositor, horntails cannot sting and are harmless to people, even though the structure often gets mistaken for a weapon.
25. Emerald cockroach wasps
The emerald cockroach wasp (Ampulex compressa) is a metallic green solitary wasp with one of the most unsettling reproductive strategies in the insect world. Rather than paralyzing a cockroach outright, the female delivers a precisely targeted sting directly into specific regions of the roach’s brain that suppress its escape reflex while leaving it able to walk.
She then leads the docile, “zombified” cockroach by one antenna back to a burrow, lays a single egg on its leg, and seals the entrance. The hatching larva burrows into the still-living host and feeds from the inside, eventually pupating inside the hollowed-out cockroach shell, a life cycle that has made this species one of the most studied parasitoids in neuroscience research as well as entomology.
Across all 25 of these types, the pattern that matters most for everyday identification is the one laid out at the start: social species defend a shared nest and sting repeatedly when threatened, while solitary species focus entirely on hunting or parasitizing and almost never bother people who leave them alone.
That single distinction, more than color or size, is the fastest way to judge whether a wasp spotted in the yard deserves caution or simply a closer look. Whether it is a paper wasp patrolling the porch rail or a fig wasp working inside fruit no one will ever see opened, each of these species plays a specific role, and most of that role has nothing to do with stinging anyone at all.