TLDR: A hornet is a type of wasp. All hornets are wasps, but not all wasps are hornets. The main differences are size and nest. Hornets are bigger: the European hornet reaches 1 3/8 inches, about twice the length of a yellow jacket. They have a wider head and build closed paper nests in trees or wall voids. Paper wasps are slimmer, dangle their legs in flight, and build open, umbrella-shaped combs. Around DC, the only “hornets” are the European hornet and the bald-faced hornet, which is really an aerial yellow jacket.
Spotted a big stinging insect on your porch and can’t tell if it’s a hornet or a wasp? The answer tells you how close you can walk to the nest and how we’d treat it. Below is the short version in a table. After that come size, color, nests, and the pairs people mix up most in Virginia, DC, and Maryland. If your question also includes bees, our bee vs wasp vs hornet guide covers all three.
What Is the Difference Between a Hornet and a Wasp?
The difference between a hornet and a wasp is one of group, not kind. Wasps, bees, and ants all belong to the insect order Hymenoptera. A wasp is any member that isn’t a bee or an ant. Hornets are one small group of wasps, the genus Vespa. So a hornet is a wasp, the same way a terrier is a dog.
According to the University of Maryland Extension, Maryland has over 1,000 wasp species. Only two of them are called hornets: the European hornet and the bald-faced hornet. Northern Virginia and DC have the same two. Most of the “wasps” homeowners call us about are yellow jackets and paper wasps.
Here is how the four you are most likely to see compare:
| European hornet | Bald-faced hornet | Yellow jacket | Paper wasp | |
|---|---|---|---|---|
| True hornet? | Yes (Vespa crabro) | No, an aerial yellow jacket | No | No |
| Length | 3/4 to 1 3/8 in (19-35 mm) | Workers 5/8 to 3/4 in; queens just over 1 in | 3/8 to 5/8 in (10-16 mm) | 5/8 to nearly 1 in |
| Color | Reddish-brown head and thorax, yellow abdomen with brown markings | Black with ivory-white face and tail tip | Bright yellow and black bands | Brown or black with yellow or reddish bands |
| Nest | Closed paper nest in hollow trees, wall voids, attics | Gray football-shaped paper ball hanging in trees or on eaves | Closed paper nest, usually underground or in a wall void | Open, umbrella-shaped comb under eaves and railings |
| Colony at peak | 200-400 workers, sometimes over 1,000 | 100-400 workers | Thousands in large nests | 20-75 members |
| Temperament | Defends the nest; flies at night | Very defensive near the nest | Very defensive; ranks highest in stings | Mostly calm unless the nest is touched |
Sizes, nest descriptions, and colony counts come from the University of Maryland Extension, which also notes that wasps in these groups can sting repeatedly, unlike honey bees. Penn State Extension puts European hornet workers at up to 1 inch (25 mm) and queens at about 1.3 inches (35 mm), and calls it the only wasp in Pennsylvania that is active at night.
Hornet vs Wasp Size
Size is the fastest way to tell a hornet from a wasp. A European hornet worker is about an inch long, and a queen can reach 1 3/8 inches. That is roughly twice the length of a yellow jacket (3/8 to 5/8 of an inch). Paper wasps fall in between at 5/8 to just under an inch. They are slim, so even a long paper wasp looks lighter than a hornet.
Are hornets smaller than wasps?
Almost never. The one “hornet” that can look small is the bald-faced hornet. Its workers are 5/8 to 3/4 of an inch, about the same as a paper wasp, because it is really a yellow jacket. The one wasp that can match a true hornet is the cicada killer, a solitary ground wasp that can reach about 1 1/2 inches. So if something is over an inch long and has a reddish-brown head, it is almost certainly a European hornet. If it is that long and is digging holes in your lawn in July, it is a cicada killer.
How big are hornets compared to wasps?
Held up against your hand, a yellow jacket is about the size of a fingernail. A European hornet is about the length of the top two joints of your finger. Paper wasps look long mainly because their legs hang down below the body when they fly.
Color, Body Shape, and Flight
Color. European hornets have a reddish-brown head and thorax and a yellow abdomen with brown teardrop marks. Bald-faced hornets are black with an ivory-white face and white bands near the tip. Yellow jackets are the bright, clean yellow-and-black ones. Paper wasps are browner and duller, and the invasive European paper wasp (Polistes dominula) has orange antennae.
Body shape. Hornets have a wide head and a thick, rounded abdomen that joins the thorax with a short waist. Paper wasps have a thin, “pinched” waist and a spindle-shaped body.
Flight. Paper wasps fly with their long back legs dangling. Hornets and yellow jackets tuck their legs up and fly fast and straight. European hornets also fly at night and will bump into porch lights and windows, which is how many people first notice them.
Hornet Nests vs Wasp Nests
The nest often tells you more than the insect does, because you can see it from across the yard.
Aerial Nests (Enclosed Comb)
Bald-faced hornets hang gray, football-shaped paper nests in trees, shrubs, and sometimes on eaves or decks. European hornets prefer hollow trees, wall voids, and attics, and their nests are tan-brown and fragile.
Ground Nests
Yellowjackets build nests in old rodent burrows or under shrubs. Cicada killers dig solitary burrows in sunny turf. Both use the ground, but a yellow jacket nest holds thousands of defensive workers while a cicada killer burrow holds one female.
Open-Comb Nests
Paper wasps create umbrella-shaped nests under eaves or porch roofs. These nests lack an outer envelope, so you can see the six-sided cells.
Mud Tube Nests
Mud daubers construct organ-pipe clay tubes on walls and beams. They rarely sting and help control spiders. You can knock down tubes if they bother you.
Hornets in the DC Area
European Hornet (Vespa crabro)
The only true hornet in our area. Workers are about an inch long, with a reddish-brown head and a yellow abdomen with brown teardrops. You’ll find them in tree hollows and wall voids. They fly both day and night. Penn State Extension notes they sometimes strip bark from lilac branches to feed on sap, which can kill those twigs.
Bald-Faced Hornet (Dolichovespula maculata)
Actually a type of yellowjacket. Workers measure 5/8 to 3/4 of an inch. They build large, hanging gray nests in trees and shrubs, often well above head height, though some are built low enough to brush past. They defend the nest hard if it is bumped.
What about giant hornets?
Neither of the large invasive hornets you may have read about lives in the DMV. The northern giant hornet (Vespa mandarinia, once called the “murder hornet”) was only ever found in the Pacific Northwest. The Washington State Department of Agriculture declared it eradicated at the end of 2024. The yellow-legged hornet was first found in Savannah, Georgia in 2023, and USDA APHIS lists detections only in Georgia, South Carolina, and North Carolina. If you see a big hornet here, it is a European hornet. More on these in our northern giant hornet profile.
Yellow Jackets and Other Wasps in DC
Yellowjackets (Vespula spp.)
Yellowjackets include Eastern and German species. They measure 3/8 to 5/8 of an inch and have bold black-yellow banding. They nest underground or in wall voids and rank highest in sting incidents. Our yellow jacket vs wasp guide covers them in detail.
Paper Wasps (Polistes spp.)
Paper wasp species like P. fuscatus and invasive P. dominula build exposed, umbrella-shaped nests. They are generally docile and give a warning before stinging. Learn more on our Paper Wasps page.
Solitary Wasps
Cicada killers can reach 30-38 mm and dig burrows in turf. Males patrol but cannot sting. Cicada Killers in Managed Turf help control cicadas. Mud daubers and potter wasps also pose little risk.
Hornets and Wasps People Mix Up Most
Bald-faced hornet vs paper wasp
Both can nest under an eave, so look at the nest. A bald-faced hornet nest is a closed gray paper ball with one entrance hole near the bottom. A paper wasp nest is a single open comb, usually only a few inches across, with the cells facing down. The insects differ too: the bald-faced hornet is black and white and stocky, while the paper wasp is brown and yellow with dangling legs.
European hornet vs paper wasp
A European hornet is bigger and heavier, with a reddish-brown head. You usually see it going in and out of a hole in a tree, wall, or soffit. It does not sit on an open comb. Paper wasps are slimmer and you can watch them walking on the nest itself. If something is hitting your porch light after dark, it is the hornet.
European hornet vs cicada killer
Cicada killers are active by day and dig burrows in lawns, while European hornets may fly at night and nest in tree cavities and walls.
Paper wasp vs yellowjacket
Check nest type: open comb means paper wasp, enclosed envelope means yellowjacket or hornet. Also note antenna color and leg length. Daren, one of our registered technicians, lists paper wasps called yellow jackets among the three things customers misidentify most often.
When Hornets and Wasps Are Active in the DMV
Spring Emergence
In early April, queens that spent the winter in sheltered spots come out and look over eaves, sheds, and cavities. Each one starts a small nest by herself.
Summer Colony Growth
May through August brings rapid nest growth. You’ll see more workers coming and going and hear more buzzing near the nest.
Fall Aggression
Late August to mid-October brings peak worker numbers. Wasps feed on picnic foods and trash cans and sting more often.
Winter Overwintering
At first frost, colonies collapse. Only new queens survive to start nests the next spring. An empty nest you find in December can be knocked down; nothing will come back to it.
What Our Technicians See in the Field
Daren, one of our registered technicians, says getting the hornet vs wasp ID right matters every time. It decides what he brings and how close he can get. “It’s not normal to have hornets inside the house unless they’re European hornets,” he told us. When he does find hornets in an attic, they are European hornets working in at the soffit. He treats that like any wall-void nest and dusts the void.
He has also driven out for a “hornet nest” that turned out to be a paper wasp comb by the front door, which he knocked down quickly with a webbing stick. The opposite happens too: he has found a bald-faced hornet nest at chest level against a utility box, right where someone could bump it. And when the call is about a hornet nest 40 feet up in a tree that nobody goes near, he will often tell the customer to leave it. It dies off at frost.
On my end, one yellow jacket job I helped with last fall was a ground nest at an HOA where residents were worried about getting stung. We treated the underground nest in intervals and came back a few days later to dig out the dead nest so nothing moved back in.
How We Treat Hornet and Wasp Nests
Always keep your distance and look from the ground. Note the nest shape, where it is, and the insect’s size. That is the information we will ask for when you call.
Ground Nest Treatments
Technicians apply insecticidal dust at the entrance and surrounding soil. This method controls yellowjackets and other ground nesters.
Aerial Nest Treatments
For hanging nests like the bald-faced hornet’s, we treat the envelope directly. Our licensed technicians use ladders and protective gear to reach high nests.
Wall Void Nest Challenges
We inject insecticidal dust or foam into voids. Follow-ups are often needed to finish the colony. The species, how high the nest sits, and whether it is in a wall void all change the job. That is why our stinging insect treatment starts with identifying what you have. For hornets specifically, see our hornet nest removal service.
Post-Treatment Prevention
Seal cracks, trim branches near structures, and remove debris. A walk around the house in April, when queens are starting nests, catches them while they are still small.
Call us at 703-683-2000 or email info@bettertermite.com for identification and removal.
