Yellow-legged hornet vs European hornet
One is an invasive predator of honey bees under active surveillance. The other is a native insect in decline that is routinely killed by mistake for it. Two features tell them apart from several metres away.
Which to choose
This is an identification rather than a choice, and the practical rule is short. Look at the legs and look at the overall darkness. Yellow leg-ends on a very dark body: photograph it from a distance and report it through the Asian Hornet Watch app or the National Bee Unit notification form. Reddish legs on a big brown-and-yellow insect, or anything flying at a lit window at night: leave it alone, because it is native and beneficial. If you are unsure, report with a photograph rather than acting — a report costs nothing and a mistaken control does.
Why these get compared
This is the identification that surveillance depends on and the one most often got wrong in both directions. False reports dilute a monitoring programme that runs on public sightings; worse, the native European hornet is destroyed on suspicion by people trying to do the right thing. The comparison is worth more than either page alone because a person who has just seen a large insect is comparing, not reading.
Where they differ
| Axis | Yellow-legged hornet (Vespa velutina) | European hornet (Vespa crabro) | Why it matters |
|---|---|---|---|
| Legs | Yellow at the ends, obvious in flight | Reddish-brown throughout | The single quickest check, and the feature the official common name was changed to emphasise. If the legs end in yellow, it is worth a photograph and a report. |
| Overall impression | Dark — an almost black thorax and a dark abdomen with one broad orange-yellow band near the tip | Brown, yellow and reddish; broadly yellow abdomen with dark markings | A dark hornet and a stripy hornet, and the difference reads at a distance. Most misidentified 'Asian hornets' are large wasps or the native hornet, both of which are conspicuously banded along the whole abdomen. |
| Size | Worker about 20-25 mm — a large wasp rather than a giant | Worker about 18-25 mm but visibly bulkier and heavier in flight; queens reach about 35 mm | Counterintuitive, and the reason size alone misleads. The two overlap in length and the native one is the heavier animal, so 'it was enormous' points away from the invasive species rather than towards it. |
| Face | Orange, seen head-on | Yellow | A confirming feature rather than a first one — useful in a photograph, hard in the air. |
| Activity at night | Daytime only | Will fly after dark and comes to lit windows | A hornet at a lit window at night is native. This one fact resolves a large share of household sightings without any close look at all. |
| Status | Invasive and non-native. Reportable through the official surveillance scheme | Native, and in decline across parts of its range. Not a species to control | The consequence of getting it wrong is asymmetric. A missed yellow-legged hornet is a lost data point in a programme with other data points; a destroyed European hornet nest is a native colony gone. |
| Relationship to honey bees | Hunts them at hive entrances, and the pressure suppresses foraging as well as killing bees | Takes insects including the occasional bee, at a scale that is not a beekeeping problem | The reason one of these is a bee-health issue and the other is not. Native hornets and honey bees have coexisted throughout their shared range. |
Where the difference is overstated
That either is a serious danger to people. Both are defensive rather than aggressive, both sting painfully, and neither hunts humans. The alarming statistics in circulation belong to the northern giant hornet, Vespa mandarinia, which is a different and much larger species, never recorded in Britain and declared eradicated from the United States in December 2024.
Sources
- Yellow-legged hornet: status, monitoring and reporting (BeeBase) — Animal and Plant Health Agency, National Bee Unit (2026) · Regulatory guidance Link
- Field Guide to the Bees of Great Britain and Ireland — Bloomsbury (2015) · Field guide
- HoneyHQ editorial synthesis — HEKNO Ltd · HoneyHQ synthesis
How sources are selected and weighted is set out in the sources and evidence policy.