Rove beetle
Staphylinidae (famille)
Role in the garden
A very large family of beetles, recognisable by their very short elytra that cover only the first abdominal segments. Generalist predators: fly larvae, pupae, eggs and larvae of other insects, small mites. The “devil's coach-horse” (Ocypus olens), a large black beetle nearly 3 cm long, lives in compost heaps and under stones.
Activity period
March to November
How to attract / manage it
The devil's coach-horse adopts an impressive defensive posture (abdomen raised like a scorpion's tail) and gives off a foul smell; if handled it can bite, but it does not sting.
Practical guide
Where to find them
In compost heaps (very numerous), under mulch and dead leaves, in the garden's damp areas. They come out at night or after rain. Recognisable: short elytra, long mobile antennae, rapid movement.
Prevention
Open compost heaps in the garden (a major refuge). Thick mulch. Dead leaves left in autumn. Preserved damp areas. No deep soil work.
Sources
- The Wildlife Trusts : Devil's coach horse (wildlifetrusts.org)
- Bohac, J. (1999). Staphylinid beetles as bioindicators. Agriculture, Ecosystems & Environment, 74(1-3), 357-372.