Are European hornets the same as 'murder hornets'?

No. European hornets (Vespa crabro) are completely different from Northern Giant Hornets, also called Asian Giant Hornets or 'murder hornets' (Vespa mandarinia). Northern Giant Hornets are much larger (up to 2 inches), have a solid orange head, and were confirmed eradicated from Washington state by WSDA in 2024 after several years of containment effort. If you spot a large hornet in the PNW, it is far more likely to be a misidentified bald-faced hornet, yellowjacket queen, or possibly a European hornet, not a Northern Giant Hornet.

Are European hornets dangerous?

European hornets can sting and inject venom, and like other wasps they can sting multiple times. For most people, a sting causes intense localized pain and swelling. For people with insect-sting allergies, stings can trigger anaphylaxis and require emergency medical care. Despite their large size and intimidating appearance, European hornets are notably less aggressive than yellowjackets and bald-faced hornets, they typically only sting when their nest is directly threatened.

Why do European hornets fly at night?

European hornets are one of the few wasp species that forage at night, most wasps and hornets are strictly diurnal. They are strongly attracted to outdoor lighting, which often leads to bumping against windows and porch lights after dark. If you see large brown-and-yellow hornets at your porch light at night during summer, that's a strong indicator of European hornets, and likely a nest within a few hundred yards.

Where do European hornets nest?

European hornets prefer enclosed, elevated nest sites, usually 6 feet or higher above the ground. Common locations include tree hollows, attics, wall voids, barns, and outbuildings. Unlike bald-faced hornets that build visible football-shaped aerial nests, European hornet nests are usually hidden inside cavities, which is why people often hear them before they see them. Colonies typically contain 200 to 400 workers at peak in late summer.

Does the All Seasons Pest Plan cover European hornet nest removal?

Yes. Stinging insect nest removal, including European hornets, bald-faced hornets, yellowjackets, and paper wasps, is covered under Interstate Pest Management's All Seasons Pest Plan. European hornet nests inside attics or wall voids often require specialized equipment to reach and treat safely.

Do European hornets damage trees?

Yes, European hornets sometimes strip bark from young trees and shrubs to feed on the sap, a behavior called 'girdling.' If girdling is severe and goes all the way around the trunk, it can kill the tree. Lilac, birch, dogwood, and ash are common targets. This is one of the few ways European hornets cause property damage beyond stinging risk.

European hornet (Vespa crabro) close-up showing the distinctive reddish-brown head and dull yellow abdominal stripes, the only true hornet established in the United States, occasionally found in Oregon and Washington — European hornet (*Vespa crabro*), 1/2″ to 1.4″ long.

European Hornets

Reviewed by TJ, ACE Certified Technician · Updated 2026-05-21

Vespa crabro | Category: Stinging Insects | ✓ Covered: All Seasons Pest Plan

If you’ve spotted a large brown-and-yellow hornet thumping against your porch light at night, you’re looking at one of the more unusual stinging insects in North America. European hornets are the only true hornet species established in the United States, bigger than bald-faced hornets, smaller than the Asian Giant Hornets that made headlines a few years back, and notably less aggressive than yellowjackets despite their intimidating size. They’re also uncommon in our region. Here’s how to know if that’s what you’re actually seeing.

Quick ID Card
Size	1/2″ to 1.4″ long (largest established wasp in the US)
Color	Reddish-brown head & thorax; brown-and-dull-yellow striped abdomen; pale face
Top ID Marker	Nocturnal, attracted to porch lights at night
Active Season	Spring through fall; peak late summer
Nest Sites	Tree hollows, attics, wall voids, barns, usually 6+ ft up
PNW Prevalence	Uncommon, mostly established east of the Mississippi
Plan Coverage	✓ Covered under All Seasons Pest Plan

Need help with this pest?

Get A Quote

Quick Answer: European hornets (Vespa crabro) are large (1/2″–1.4″) reddish-brown and dull-yellow wasps and the only true hornet species established in the United States. Introduced from Europe in the 1840s, they are primarily found in the eastern and midwestern US and are uncommon in the Pacific Northwest. They are unusual among wasps for being nocturnal, foraging at night and often gathering at porch lights. Despite an intimidating size, they are notably less aggressive than yellowjackets or bald-faced hornets. They can sting multiple times and pose a serious risk to people with insect-sting allergies.

Key facts at a glance: Size: 1/2″–1.4″ · Color: brown & yellow · Nocturnal: yes · True hornet: yes · PNW prevalence: uncommon · Multiple stings: yes · Anaphylaxis risk: yes (for allergic individuals) · Plan coverage: Yes, All Seasons Pest Plan.

Not the same as “murder hornets”: European hornets are completely different from Northern Giant Hornets, also known as Asian Giant Hornets or “murder hornets” (Vespa mandarinia). The Northern Giant Hornet was detected in Washington state starting in 2019, and the Washington State Department of Agriculture confirmed eradication of the small established population by 2024. If you spot a large hornet in the PNW today, it’s far more likely to be a misidentified bald-faced hornet or queen yellowjacket than either species.

Safety note: If you or someone in your household has a known insect-sting allergy, treat any suspected European hornet nest near the home as an urgent issue. Symptoms of anaphylaxis after a sting, difficulty breathing, throat swelling, hives away from the sting site, rapid pulse, or dizziness, are a medical emergency. Call 911. Use a prescribed epinephrine auto-injector if available.

What You Need To Know About European Hornets

Our ACE Certified Technician TJ breaks down European hornets, what they actually look like, why their nocturnal behavior is unique, and how they differ from Asian Giant Hornets.

Frequently Asked Questions

What do European hornets look like?

Big, 1/2″ to 1.4″ long. Reddish-brown head and thorax, with a brown-and-dull-yellow striped abdomen and a pale face. Larger than bald-faced hornets, smaller than Asian Giant Hornets. The only true hornet established in the US.

Are these the “murder hornets”?

No. European hornets are a different species from Northern Giant Hornets (the “murder hornets” that were detected in WA from 2019–2024). WSDA confirmed eradication of the WA population in 2024. If you see a large hornet in the PNW today, it’s most likely a bald-faced hornet or queen yellowjacket.

Are they common in OR & WA?

No, uncommon. Their established range is mostly the eastern half of the US. They’ve been documented in the PNW occasionally but aren’t a widespread household pest here. Most large hornet sightings in the PNW are actually other species.

Are they dangerous?

They can sting multiple times and the venom causes intense pain. For people with insect-sting allergies, stings can trigger anaphylaxis. That said, they’re notably less aggressive than yellowjackets or bald-faced hornets, they usually only sting when the nest is directly threatened.

Why are they at my porch light?

Almost unique among wasps, European hornets forage at night and are strongly attracted to outdoor lights. If you see large brown-and-yellow hornets at your porch light after dark in summer, that’s the strongest behavioral indicator for the species, and a sign of a nest somewhere within a few hundred yards.

Where do they nest?

Enclosed sites at least 6 feet up: tree hollows, attics, wall voids, barns, sheds. Unlike bald-faced hornets that build visible aerial nests, European hornet nests are usually hidden inside cavities, which means you’ll often hear them before you see them.

Does my All Seasons Plan cover nest removal?

Yes, included. European hornet nests inside attics or wall voids often need specialized equipment to reach and treat safely without spreading the colony.

Do they damage trees?

Yes, they strip bark from young trees (lilac, birch, dogwood, ash are common targets) to feed on the sap. Severe girdling can kill the tree. This is one of the few ways they cause property damage beyond sting risk.

Signs You Might Have European Hornets

European hornets behave differently than the wasps most PNW homeowners encounter. Here’s what tips off our technicians:

1. Large hornets at porch lights at night

The single most diagnostic sign. Most wasps and hornets are strictly diurnal, if you’re seeing big brown-and-yellow hornets at lights after dark, this is probably European hornets.

2. Buzzing from inside walls or attics

Because European hornets nest inside cavities, the colony is often audible before it’s visible. Persistent buzzing from a specific spot in a wall, ceiling, or attic in late summer is a strong indicator.

3. Stripped bark on small trees or shrubs

European hornets sometimes girdle young branches of lilac, birch, dogwood, and ash. Look for fresh light-colored stripes where bark has been chewed away.

4. Hornets at a hole in a tree or eave

A steady stream of large hornets coming and going from a tree cavity, attic vent, or gap in siding indicates an enclosed nest. Watch from a safe distance.

5. Distinct brown & dull yellow coloration

If you can get a photo (safely) and it shows a reddish-brown head and thorax with brown-and-yellow stripes, not pure yellow-and-black like yellowjackets, that supports European hornet ID.

6. Continued activity late in the season

European hornet colonies tend to remain active into October in mild PNW falls, longer than many other wasps. Late-season activity around a cavity nest is consistent with the species.

Behavior, Biology & Lifecycle

European hornets are unusual among stinging insects in several ways, and the differences explain why removal looks different from other species:

The only true hornet in the US

Vespa crabro is the only species of true hornet (genus Vespa) established in North America. Bald-faced hornets are technically aerial yellowjackets, named “hornet” for their size, but biologically different. European hornets are the real thing.

Introduced from Europe in the 1840s

First documented in the New York City area in the 1840s, the species spread west and is now established across roughly 30 eastern and midwestern states. PNW establishment has been limited, the species exists here but isn’t a widespread household pest the way it is in places like Pennsylvania or Ohio.

Nocturnal foragers, rare among wasps

Most wasps and hornets return to the nest at dusk and stay put until dawn. European hornets break that rule, they continue foraging at night and are strongly attracted to outdoor lights. Banging against your porch light or window at night is classic behavior.

Less aggressive than reputation suggests

Despite their intimidating size, European hornets are notably less aggressive than yellowjackets or bald-faced hornets. They usually only sting when their nest is directly disturbed or they’re physically threatened. Foraging hornets at a porch light typically ignore people who don’t engage them.

Cavity nesters, not aerial builders

European hornets nest inside enclosed cavities, tree hollows, attics, wall voids, barns, sheds, abandoned beehives. They don’t build the visible football-shaped aerial nests bald-faced hornets are known for. The colony is usually hidden, which makes professional treatment more involved.

Annual colonies, predator diet

Like other wasps, European hornet colonies are annual, the colony dies in late fall and only mated queens overwinter. Workers prey on other insects (including pest species like flies and yellowjackets) to feed larvae, and adults consume tree sap and ripe fruit.

Homeowner Safety Steps

These steps are about identification and safety, not DIY nest removal from cavity locations.

Get a positive ID first
Most large hornet sightings in the PNW aren’t European hornets. A safely-taken photo and side-by-side comparison with the ID card on this page is the fastest way to confirm what you actually have.
Reduce outdoor lighting at night
European hornets are strongly drawn to outdoor lights. Switching to yellow “bug” bulbs, motion-activated lights, or warmer-temperature LEDs reduces nighttime attraction near the home.
Don’t attempt to open a cavity nest
European hornet nests inside walls, attics, or trees should not be opened by a homeowner. Disturbing a hidden colony can release hundreds of defensive workers into a confined space.
Keep distance from active entrances
If you’ve identified a nest entrance, stay 15–20 feet away and brief the household on the location. Move outdoor furniture out of the flight path. Keep pets and kids clear.
Call a licensed pro for removal
Cavity-nest treatment requires equipment most homeowners don’t have, injection products, proper PPE, and access methods to treat hidden colonies without spreading them.