Rove Beetles can't be bought. The way to get more in the garden is to create the right conditions, and here's how.
What does it look like?
Rove beetles (family Staphylinidae) are 2 to 30mm long, with elongated bodies and short wing cases that leave most of the abdomen exposed. Most are black or brown, though some have red wing cases and markings, and with over 1,000 species in Britain, it's the country's biggest beetle family by far. The devil's coach horse (Ocypus olens), pictured here, is Britain's largest rove beetle at 20 to 30mm, matt black, and hunts other invertebrates after dark, crushing them with its pincer-like jaws. When threatened it curls its abdomen up like a scorpion's tail and releases a foul-smelling substance, and it can deliver a painful bite if handled, though it has no sting and poses no real danger. Larvae are elongated and soft-bodied, with three pairs of legs near the head; the head, thorax and part of the abdomen are usually brown or black, with a creamy-white underside.
Life cycle
Eggs are laid in the soil or in accumulations of organic matter. Larvae generally stay in the soil or leaf litter, where they feed on other invertebrates and their eggs. Adults are active on the soil surface, most often from March to October.
How to encourage it
Rove beetles are ground-dwelling, so habitat matters more than planting. Wood piles, compost heaps and leaf litter left in borders give them somewhere to shelter and hunt.
Slug pellets, even organic ones, have been shown to harm other wildlife in the garden: reaching for pellets to deal with slugs undoes the very predator you're trying to attract.
Why this matters in Scotland
The devil's coach horse has 234 recorded sightings on NBN Atlas Scotland, the national biodiversity records database, as of 2026-08-04.
That's a real but modest number of sightings, not the kind of everyday encounter some other garden insects are.
What it helps control
The same wood-pile and leaf-litter habitat also supports ground beetles, another leek moth predator. Beyond leek moth and slugs, rove beetles more broadly take worms, spiders, woodlice and other invertebrates, and will also scavenge carrion. The devil's coach horse's threat display and painful bite make it a common casualty of mistaken pest-squashing, but it's a beneficial predator worth leaving alone.
Myths about rove beetles
4 common claims about rove beetles, checked: 3 busted0 disputed0 untested1 hold up
“The devil's coach horse beetle's raised-tail scorpion pose means it can sting you”
The devil's coach horse curls its abdomen up over its back like a scorpion's tail when threatened, but that's a bluff. It has no sting and no venom apparatus at all; the display is paired with a foul-smelling secretion, not a stinger.
Our read The scorpion look-alike posture is doing all the work here. It's a defensive display copied from a genuinely dangerous animal, aimed at predators (and nosy gardeners) rather than backed by any matching weapon.
What to do: Leave it be if you see the pose. It's a warning display, not a stinging threat, so there's no need to retreat or swat at it.
2 sources
- Wildlife TrustsThe devil's coach horse curls its abdomen like a scorpion's tail and releases a foul-smelling substance when threatened, but has no sting.
- BuglifeThe devil's coach horse does not have a sting; it relies on large jaws to catch prey and a scorpion-like posture plus foul smell to deter threats.
“The devil's coach horse is venomous or genuinely dangerous to touch”
Handled carelessly, it can deliver a painful nip with its jaws, but it carries no venom. Both sources describe the bite as something to avoid, not something to fear.
Our read "Painful bite" and "dangerous" aren't the same claim. A pinch from those pincer-like jaws is unpleasant, similar to a sharp nip from any large-jawed beetle, but it isn't a medical concern.
What to do: No need for gloves or caution beyond common sense: don't pick one up between bare fingers, and it won't bother you otherwise.
2 sources
- Wildlife TrustsThe devil's coach horse can deliver a painful bite to humans if handled.
- BuglifeFor its size the devil's coach horse has very large jaws and can deliver an impressive bite, so it's best left alone rather than picked up.
“The devil's coach horse itself is a pest to get rid of, not a beneficial insect”
It's a carnivorous predator, not a plant-feeder. Its prey includes slugs, worms, spiders, woodlice, other invertebrates and carrion, and rove beetles as a whole are largely predatory, hunting on the soil surface.
Our read Nothing in its diet touches crops or ornamentals. Confusion likely comes from its size, dark colour and defensive display reading as threatening, rather than anything it actually does to plants.
What to do: Leave wood piles, compost heaps and leaf litter undisturbed to give it somewhere to shelter and hunt; it's working in your favour against slugs and other soft-bodied pests.
“The devil's coach horse is often mistaken for an earwig or other pest and killed on sight”
Buglife names the confusion directly: the devil's coach horse's dark, elongate body without obvious pincers can read as an earwig at a glance, and it's only when it raises its scorpion-like tail that the two become easy to tell apart.
Our read A beetle that gets mistaken for an earwig or other unwanted insect is a beetle at risk of being swatted before anyone looks closely, and that's a real loss given how much slug and pest predation it does in a garden.
What to do: Check for the raised-tail posture before assuming an unfamiliar dark beetle is a pest. If it curls its abdomen up when disturbed, it's a devil's coach horse, not an earwig, and worth leaving to get on with hunting.
1 source
- BuglifeThe devil's coach horse can sometimes be mistaken for an earwig, but its scorpion-like posture when threatened gives it away.
Frequently asked questions
Can I buy rove beetles?
Not usefully: rove beetles released into a garden with nothing to hold them there simply leave. Creating the right habitat and food source is what actually keeps a population around; see "How to encourage it" above.
How do I know if rove beetles are actually helping?
Watch the pest population, not the predator count: fewer leek moth, slugs and snails over a few weeks is the real sign, not how many rove beetles you can spot on a given day.
Do rove beetles only deal with the pests listed above?
No, also worms, spiders, woodlice and other invertebrates; will scavenge carrion too. The list above is what they're best known for, not the full extent of what they take.
When will I actually see rove beetles in the garden?
It depends on the stage in their life cycle — see "Life cycle" above for when they're active and what to expect through the year.
Sources
6 sources, recorded with what each was used for
- RHS: For Leek Moth: Encourage natural predators including ground and rove beetles.
- Buglife: For Slugs and Snails: Buglife's own devil's coach horse page names slugs specifically among its prey, alongside worms, spiders, woodlice and other invertebrates.
- RHS: RHS's dedicated ground beetles and rove beetles page: identification (size, elongate shape, short wing-cases, colouring, the devil's coach horse as Britain's largest rove beetle, species count), life cycle (eggs in soil or organic matter, legless larvae with three pairs of legs near the head), diet (largely predatory, active on the soil surface), and habitat advice (wood piles, compost heaps, leaf litter).
- Wildlife Trusts: The devil's coach horse hunts other invertebrates after dark, curls its abdomen like a scorpion's tail and releases a foul-smelling substance when threatened, and can deliver a painful bite if handled, though it has no sting.
- NBN Atlas Scotland: NBN Atlas Scotland's devil's coach horse species page recorded 234 sightings in Scotland as of 2026-08-04.
- RHS: RHS's slugs and snails page: slug pellets, even organic ones, have negative effects on wildlife in the garden.