Are European hornets more aggressive than other wasps?

Not especially — they're generally less defensive around their nest than some yellowjacket species and mainly become aggressive if the nest itself is directly disturbed. Their large size and nighttime activity make them seem more alarming, but unprovoked stinging incidents are relatively uncommon compared to ground-nesting yellowjackets.

Why are European hornets active at night?

They're one of the few social wasps in the region that regularly forages after dark, which is also why they're sometimes seen banging against windows or porch lights at night — they're drawn to the light the way many night-flying insects are, not hunting anything specific to that spot.

Do European hornets reuse the same nest cavity every year?

No — each colony builds a fresh nest each spring and dies off by late fall except for newly mated queens, which overwinter separately and start an entirely new nest the following year, so an empty cavity used one season isn't automatically reused the next.

Daniel Brady · NH-Licensed Pesticide Applicator · License #782664

What Attracts European Hornets to Your House?

The usual four

European hornets aren't pulled toward your house by anything unusual — like other social wasps, they need a protected cavity to build a nest and a supply of insect prey plus some tree sap or sugar sources. A hollow tree, but also a barn, shed, attic, or wall void, gives them exactly the enclosed cavity they're looking for. Food and a nest cavity are the whole explanation.

At a glance

Short answer: European hornets want an enclosed nest cavity and insects to hunt — nothing else is going on.
The verdict: The usual four

What actually brought it here

The attractant verdict

Four possible answers to why this species turned up. Three stay unlit — and that's the argument: the honest answer could have been any of them, and for this species it wasn't.

You didn't — you carried it innothing about your house did this

The belief is wrongthe common answer is counterfactual

Something specifica real, sourced attractant

The usual fourfood · water · warmth · shelter — like almost everything

This is the most common answer in this hub — an answer, not a shortfall.

The verdict on european hornets

The usual four

European hornets want an enclosed nest cavity and insects to hunt — nothing else is going on.

What the internet says

Our own previous page described several reasons European hornets are ‘drawn to your home’ without naming the two that actually matter — a nest cavity and food.

What actually brought it

An enclosed cavity — historically a hollow tree, but just as often a barn, shed, attic void, or gap behind siding — combined with a supply of prey insects (their main food) plus tree sap and some sugary sources. European hornets build their nest at the cavity opening rather than deep inside it.

“Nothing about a European hornet is special. It wants an enclosed cavity to nest in and insects to hunt — an old barn or attic void works as well as a hollow tree.”

So what actually matters

FoodShelter

The answer

Why it's here, in full

Why a nest cavity and food are the whole story

European hornets are unusual among social wasps in the region for nesting inside an enclosed cavity rather than building a fully exposed nest, and for remaining active after dark, when they're drawn to outdoor lighting. What decides where a colony settles is simply whether a suitable cavity exists — a hollow tree limb, a barn or shed wall void, a gap behind siding, an attic space — combined with enough insect prey and tree sap nearby to sustain the colony through the season. Nothing about a house is a specific lure beyond offering that enclosed cavity.

Did it visit?

How to tell it's actually this species

Real signs only — a species with four honest tells gets four, and stops. Where a sign is weak on its own, we say so.

A grey-brown paper nest built at the opening of a cavity — a hollow tree, wall void, or attic vent — rather than hanging freely in the open
Large hornets active at night near outdoor lighting, unlike most other wasps which are active only by day
A steady stream of hornets flying in and out of one specific gap in siding, a vent, or a hollow tree limb

The next question

Want european hornets gone?

This page only answers why it's here. Every removal step for this exact species — what to seal, what to set, what actually works — lives on its own dedicated guide.

See how to get rid of it

Species profile

Two questions, two pages

Here: why it turned up at all — the honest answer, blame removed.
There: the step-by-step removal guide for this exact species.

Already dealing with hornet european hornet?

This page is about why it's there. Getting rid of it is covered at /top-diy-methods/hornet-european-hornet.

See removal options (603) 785-0118

Follow-up questions

Frequently asked

Sources(2)

[1]
Penn State Extension — European Hornet
European hornet cavity-nesting behavior and nighttime activity
extensionverified 2026-07-17
[2]
NC State Extension — European Hornets
Nest location in hollow trees, barns, and attics, and annual colony cycle
extensionverified 2026-07-17

Written & reviewed by

Verified

Daniel Brady

NH-Licensed Pesticide Applicator · License #782664 (NHDAMF, RSA 430)

Daniel Brady is the New Hampshire–licensed applicator behind Anchor Pest Services, a family-owned pest control company serving the Manchester area since 2017.

Verify license

Last updated Jul 2026

Food, water, warmth, shelter — the usual four

If it's already inside, we handle the rest

Same-day inspections across southern and central New Hampshire.

Get a free inspection (603) 785-0118

Family-owned in Manchester since 2017
NH commercial applicator #782664, category F1
We will tell you when the answer is do nothing

NH License #782664 · No obligation · We answer in person

Keep Exploring

What Attracts European Hornets to Your House?

The attractant verdict

Why it's here, in full

Why a nest cavity and food are the whole story

How to tell it's actually this species

Want european hornets gone?

Already dealing with hornet european hornet?

Frequently asked

If it's already inside, we handle the rest

Your next step

European Hornet — Quick ID for New Hampshire Homeowners

Is It Dangerous to Remove a Hornet Nest Without Professional Help?

Do hornets damage homes or just sting?

How to Get Rid of European Starlings