Asian Hornets in the UK

If you keep bees, you don't need a newspaper to tell you the Asian hornet is a problem. You learn it the first time you watch one hover a foot off your hive entrance, pick a returning forager out of the air, and carry her off.

That single behaviour (we beekeepers call it "hawking") tells you everything about why this insect matters, and why we spend our spring mornings squinting at flowering shrubs instead of drinking our tea in peace!

You've almost certainly seen an Asian hornet in the headlines by now. Scientifically it's Vespa velutina nigrithorax; you'll also see it called the yellow-legged hornet, which is, frankly, the better name, because the yellow leg-tips are one of the quickest ways to tell it apart from anything native.

Whatever you call it, the Asian hornet is a non-native species that has become a genuine and growing concern across England, and increasingly the rest of Britain too.

Where the yellow-legged hornet came from

It arrived in Europe via France in 2004, reportedly hitching a lift in a consignment of pottery imported from China, and landed in the south-west of the country. From there it did what invasive non-native species do best: it spread rapidly. It's now firmly established across France, Spain, Portugal, Italy, Belgium, the Netherlands, Germany, Switzerland and Jersey.

Britain has been on the front line since 2016. The first Asian hornet in the UK was confirmed in September 2016, when a nest was found near Tetbury in Gloucestershire and destroyed after ten days of searching. For a few years afterwards the incursions were small, just a handful of hornets and the odd nest, each hunted down and dealt with.

An invasive non-native species - confirmed sightings

Then came 2023, and the picture changed. That year the National Bee Unit located and destroyed 72 nests across 56 locations, the majority in Kent, almost certainly helped by an easterly wind carrying founding queens across the Channel. It was, at the time, more than every previous year put together.

Sadly, it didn't stop there. In 2024 came the first genetic proof that Asian hornet queens had successfully overwintered on British soil. And 2025 was worse again: 161 confirmed nests destroyed (that's over 270 since 2016), well over 500 credible sightings, and crucially, the first evidence of a second UK-bred generation.

Nests have turned up far outside the usual south-east hotspots in places like Cheshire, Yorkshire, the Isles of Scilly, and even a nest near Wrexham that became the first credible record in Wales.

Officially, the Asian hornet is 'not yet established' here. That's a precise term - it means there's no self-sustaining, reproducing population surviving over multiple generations without human help. By that strict definition it's true...but it's a narrowing gap.

The government's own view was that 2025 was probably our last realistic chance at full eradication, and a good many of us who deal with the hornet on the ground suspect it may already be here to stay. Which is exactly why what you do in your own garden still counts.

Why it matters so much

The Asian hornet is a voracious predator. A single established nest gets through an estimated 11 kg of insects in a season, and it isn't fussy - it takes a wide range of insects, feeding on the protein in their thorax. But its favourite prey, and the reason beekeepers lose sleep, is the European honey bee.

One hornet stationed outside a hive can kill dozens of foragers in a day. Multiply that across a colony of hornets and a strong apiary can be brought to its knees, the bees too frightened to leave the hive to forage.

Beyond the hive, it's a threat to honeybees and other pollinators, to native insects and native wildlife more broadly, and therefore to the biodiversity of the whole ecosystem, including the birds and animals that depend on those insects, and the crops that depend on pollinating insects to set fruit.

For humans, the picture is calmer than the scare stories suggest.

An Asian hornet sting is a health risk in the same way any hornet or wasp sting is. 
It's no worse than our native European hornet, and the real danger is to people with allergies to hornet or wasp stings.

The one caveat - like any hornet, they defend the colony hard, so if a hornet's nest is threatened or disturbed they'll come out in numbers. Only observe nests from a distance and never, ever poke one.

How to tell an Asian hornet from a native one

This is where a bit of experience earns its keep, because the Asian hornet is easily confused with other species, chiefly our own European hornet, and to a lesser extent large wasps.

The single most reliable feature is the abdomen. On an Asian hornet it's almost entirely dark, with one clean yellow-to-orange band on the fourth abdominal segment. Learn that one detail and you're most of the way there.

Contrary to what a lot of people assume, the Asian hornet is smaller than our native European hornet, not bigger. Here's the side-by-side:

Asian hornet queens are noticeably bigger than the worker hornets and are the ones you'll spot in spring (and sometimes autumn). So a large individual early in the year isn't automatically a European hornet, so check the fourth segment and the legs before you decide.

If you want to drill the ID properly, the National Bee Unit's identification guide is worth ten minutes of anyone's time.

	European hornet Larger than Asian hornets Head yellow from front and red from above Abdomen mostly pale yellow with black stripes  Thorax and legs black/ reddish brown Overall rusty orange appearance
	Asian hornet Smaller than native hornets Orange head (from front) Abdomen almost entirely dark, with fine yellow stripes and a yellow or orange 4th segment near the base Black or brown thorax Legs with yellow tips

What you can actually do to help

The honest truth is that stopping this species is a numbers game, and it needs the public. Here's where you come in.

Be vigilant

Learn the ID guide above and stay vigilant for Asian hornets from spring onwards. Your own garden is the best place to watch. Check flowering plants, ripe fruit, and anywhere insects gather, but keep your eyes open when you're out and about too.

Wide-open spaces like National Parks and farmland have far fewer people keeping watch, so a report from a walker can matter more than you'd think.

Seen an Asian hornet? How to report Asian hornet sightings

This is the important bit. If you've seen an Asian hornet, the single best tool is the free Asian Hornet Watch app, available on both Android and iPhone. It walks you through the ID, records the location, and sends your report straight to the UK Centre for Ecology & Hydrology, where it's checked and passed to the response teams.

Do it even for potential sightings - a photo turns a maybe into a confirmed sighting.

You can also report yellow-legged hornets via the online reporting form on the National Bee Unit / gov.uk website, or email a photo to alertnonnative@ceh.ac.uk.

Whichever route you use, please don't try to catch or kill a hornet at a nest, and don't attempt to destroy a nest yourself. Report it, and let Defra's National Bee Unit take the specialist action needed.

Monitor with traps, carefully

A well-placed monitoring trap, checked regularly, is a good early-warning system, and spring is the most valuable window. Every founding queen caught before she builds is one less nest to find in summer.

But choose a selective trap and empty it often.

The blunt-instrument traps drown everything that flies in, and the whole point is to protect native insects, including our native European hornet, which is a beneficial and increasingly scarce part of British wildlife and the environment.

There are several selective options, but this affordable trap from Mêl Gwenyn Gruffydd Honey is a reasonable place to start.

Spread the word

Most people still can't tell an Asian hornet from a large wasp. Every neighbour, gardener or fellow beekeeper you teach becomes another pair of eyes. More awareness means more reports, faster nest-finding, and better odds for the eradication effort. So share this guide!

If a nest is confirmed near you, cooperate with the National Bee Unit and local Asian hornet action teams (often organised through your regional beekeeping association or Wildlife Trust) so it can be dealt with safely and quickly.

None of this comes with a tidy ending, and it would be dishonest to pretend otherwise. The Asian hornet may already have a toehold we can't shake off.

But the difference between "present" and "everywhere" is measured in nests found early, and that still comes down to ordinary people looking closely at the insects in their gardens.

So keep watching. The bees are counting on it!