If you've found a long, slim black or brown beetle racing across your basement floor or bathroom tile, and it curled its tail up like a scorpion when you got close, you've met a rove beetle. Around your Somerset County home, rove beetles usually live outdoors in damp leaf litter, mulch and compost, where they hunt other small insects. Now and then they wander inside. They look a little menacing, but they're mostly harmless, and the trick to dealing with them is simpler than you might think. Below, we'll cover how to identify rove beetles, why they come in and how to keep them out with a little home pest-proofing.
What Rove Beetles Are
Rove beetles make up one of the largest families of beetles in the world, with species that range from tiny to over an inch long. Most that you'll see around a home are small to medium-sized. A few traits make them easy to recognize:
- Shape. Long and narrow, with a flexible body.
- Short wing covers. The hard wing covers are short and leave most of the abdomen exposed. Their flying wings fold up neatly underneath.
- Raised tail. Many lift the tip of the abdomen when disturbed, which gives them a scorpion-like look.
- Speed. They run quickly and many can fly.
- Color. Usually black or brown. Some have orange, red or patterned markings.
Because of the short wing covers, people sometimes mistake rove beetles for earwigs. Earwigs have obvious pincers at the end of the abdomen. Rove beetles don't. They're also sometimes confused with ground beetles, but ground beetles have long, hard wing covers that hide the whole abdomen. If you see a beetle with most of its body bare and segmented behind short wing covers, it's almost certainly a rove beetle. You'll see them most often from spring through fall, when they're active outdoors and moving around in search of food.
Why Rove Beetles Come Inside
Rove beetles don't come indoors to live or breed. They end up inside by accident, usually for one of these reasons:
- Moisture nearby. Damp mulch, leaf piles and wet soil against the foundation give them a place to live right next to your walls.
- Other insects. They hunt springtails, fly larvae, mites and other small insects, so they follow their food.
- Gaps. Cracks in the foundation, gaps under doors and openings around pipes give them a way in.
- Lights. Some fly at night and are drawn to lit doors and windows.
- Weather. Heavy rain or a dry spell can push them to look for new shelter.
Indoors, they turn up in basements, bathrooms, laundry rooms and crawl spaces, the same damp areas that attract other moisture-loving pests. Our guide on common pests in crawl spaces covers what else tends to live there.
Are Rove Beetles Harmful?
Most rove beetles are harmless to people, pets and your home. They don't sting, despite the raised tail. Larger ones can give a small pinch if picked up, so it's best to move them with a cup or paper rather than bare hands. They don't eat wood, fabric or stored food, and they don't infest homes.
Outdoors, they're actually helpful. Rove beetles are predators that eat many small insects in soil, compost and leaf litter, including some garden pests.
The bigger message is what their presence tells you. A lot of rove beetles indoors often means there's extra moisture, decaying material or another insect population nearby. Fixing that solves the rove beetle problem too.
The Trick: Moisture And Gaps
Spraying for rove beetles indoors rarely makes sense. The trick is to make the area around and inside your home less inviting and harder to enter.
- Pull mulch back. Keep mulch and leaf litter a few inches away from the foundation.
- Fix drainage. Clean gutters, extend downspouts away from the house and make sure soil slopes away from walls.
- Dry damp rooms. Run a dehumidifier in the basement, fix leaks and improve ventilation in bathrooms and crawl spaces.
- Seal entry points. Caulk foundation cracks, seal around pipes and utility lines and install door sweeps.
- Move compost and wood piles. Keep them away from the house.
- Adjust lighting. Use warm-colored bulbs near doors and turn off outdoor lights you don't need.
- Remove strays. Sweep or vacuum the ones you find inside and release or dispose of them outdoors.
When To Call A Professional
If you keep finding rove beetles along with other insects like springtails, millipedes or centipedes, there's probably a moisture or entry problem worth looking into. Our NJ DEP-licensed technicians can inspect your home, find where insects are getting in, seal entry points and recommend a plan using Integrated Pest Management and EPA-registered, eco-safe products. We offer free inspections and same-day or next-day service.
Rove beetles are a sign, not a threat. Drying out damp spots and closing a few gaps is the simplest way to keep them outside, where they belong, at your Somerset County home.