If something the size of your thumb has just flown past your head making a noise like a tiny helicopter, you’ve probably just met a hornet. They’re bigger, louder, and more alarming-looking than wasps, which is exactly why most people’s first instinct is to panic. The good news is that hornets are generally calmer than wasps day to day. The less good news is that if there’s a nest on your property, it needs proper attention, not a can of spray and a hope for the best.
Here’s what you actually need to know: how to tell a hornet from a wasp, what a hornet nest looks like, whether you should be worried, and what to do next.
What is a hornet, exactly?
The hornet you’re most likely to see in Bristol is the European hornet, the UK’s only native hornet species. They’re roughly an inch long, noticeably bigger and chunkier than a common wasp, with a brownish-red and yellow colouring rather than the sharp black and yellow banding you’d see on a wasp. They also fly slower and louder, which is often the first thing people notice.
Despite the size and the noise, European hornets are actually less aggressive than common wasps day to day. They’re not looking for a fight and generally won’t bother you unless their nest is disturbed. The size alone tends to trigger more fear than the behaviour justifies.
Hornet or wasp: quick ways to tell them apart
If you’re not sure which one you’re dealing with, a few quick checks help.
- Size: Hornets are noticeably larger, often close to double the size of a common wasp
- Colour: Hornets are more brown and amber than the bold yellow and black of a wasp
- Sound: Hornets fly slower and louder, almost a deep buzz compared to a wasp’s higher-pitched drone
- Behaviour: Hornets are generally less likely to swarm or chase, though they will defend a nest just as fiercely as wasps will
If you’re after a fuller breakdown of what makes a wasp a wasp in the first place, our wasps vs bees guide covers the other end of that confusion too.
What a hornet’s nest looks like
Hornet nests are built from the same papery material as wasp nests, chewed wood fibre mixed with saliva, but tend to be larger and greyer in colour. They’re usually found in hollow trees, sheds, lofts, or wall cavities, somewhere sheltered and undisturbed.
We’ve covered nest identification in more detail in our piece on wasp nest identification and removal, which also explains how to tell a hornet nest apart from a wasp nest by size and shape. As a general rule, if the nest is football sized or larger with a smooth, rounded exterior and a single opening, you’re likely looking at hornets rather than wasps.
Are hornets dangerous?
A hornet sting is more painful than a wasp sting, simply because of the size of the insect and the amount of venom involved, but for most people the reaction is the same: redness, swelling, and discomfort that settles down within a day or so. The real risk, as with wasps, is for anyone with a known allergy, where a sting can trigger a much more serious reaction and needs urgent medical attention.
Hornets are also more likely to be active at night, drawn to light, which is worth knowing if you’ve got an outdoor light near a nesting spot.
A note on Asian hornets
You may have seen coverage of Asian hornets, also called yellow-legged hornets, appearing in parts of the UK. They’re an invasive species, smaller and darker than our native European hornet, and they pose a real risk to honeybee populations rather than to people directly. Sightings have been increasing, including a nest found in Wales earlier this year, though the vast majority of hornets spotted in gardens across the country are still the native European hornet.
If you think you’ve genuinely seen an Asian hornet rather than the native species, it’s worth reporting it through the Asian Hornet Watch app so it can be properly identified. For everyday hornet problems around your Bristol home, though, you’re almost certainly dealing with the native species covered in this guide.
What not to do
The same rules apply here as with wasps. Don’t throw water at a nest, don’t try to smoke it out, and don’t attempt to knock it down or spray it yourself. A hornet nest that’s only partially treated tends to provoke exactly the defensive response you were trying to avoid, and with a larger insect, that’s a bigger risk to take.
Wasp traps, including the DIY versions we’ve covered before, aren’t really built with hornets in mind either. They can occasionally catch the odd hornet, but they won’t do anything about an actual nest, and trying to manage a hornet problem with a homemade trap alone usually just delays the point at which you call a professional.
When to call a professional
If you’ve found a nest, or you’re seeing a lot of hornet activity concentrated in one area of your property, that’s the point to get in touch rather than wait and see. Our wasp and hornet control service covers exactly this, safe, same-day treatment for both wasp and hornet nests across Bristol, without the risk of trying to handle a large, established nest yourself.
Frequently asked questions
How do I know if it’s a hornet and not a wasp?
Hornets are noticeably larger than common wasps, with a browner, more amber colouring rather than sharp yellow and black banding, and they fly slower with a deeper, louder buzz.
Is a hornet sting worse than a wasp sting?
Generally yes, hornet stings tend to be more painful due to the size of the insect and the amount of venom, though the reaction for most people is still just localised swelling and discomfort that settles within a day or so.
Can I treat a hornet nest myself?
It’s not recommended. Hornet nests are often larger and harder to access than wasp nests, and a failed DIY attempt can provoke the whole nest, increasing the risk of multiple stings.
What should I do if I think I’ve seen an Asian hornet?
Report it through the Asian Hornet Watch app rather than approaching it. Asian hornets are an invasive species and confirmed sightings need to be verified, but the hornets most people encounter in Bristol are the native European hornet.
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