Several common insects share enough features with earwigs to cause confusion, especially when you spot them darting across a bathroom floor or hiding under a flowerpot. The key to telling them apart is one distinctive trait: earwigs have a pair of curved, pincer-like appendages (called forceps) extending from the tip of their abdomen. If the bug you’re looking at has pincers at its back end, it’s almost certainly an earwig. If the pincers are at the front, or if the bug has tail-like filaments instead, you’re dealing with something else entirely.
Why Earwigs Get Confused With Other Insects
Earwigs have a combination of features that overlap with several unrelated species. Their bodies are long, flat, and dark brown. They have short, hardened wing covers (similar to beetles) and prefer the same damp, dark hiding spots as many other household pests. At a glance, especially in dim light, the differences can be hard to spot.
The forceps are the single most reliable identifier. Earwigs use these modified cerci to defend themselves and spar with other earwigs. They’re not venomous, and they rarely break human skin even if an earwig does pinch you. Many other insects have jaw-like structures or tail appendages that can look similar, but the position and shape differ once you know what to check.
Rove Beetles
Rove beetles are probably the most common earwig lookalike. They have the same elongated body, dark coloring, and exposed abdomen that earwigs do. Most rove beetles are small, between a quarter and one inch long, and they raise their abdomens when disturbed in a way that can look like they’re brandishing pincers. The difference: rove beetles lack the curved forceps entirely. Their abdomens taper to a point or end bluntly.
One group of rove beetles, the Paederus genus, deserves special attention because it poses a real health risk that earwigs don’t. These beetles carry a chemical called pederin in their blood. They don’t bite or sting, but if you crush one against your skin, the pederin causes a delayed reaction: a painful, blistering rash that appears 12 to 36 hours later. The blisters tend to form on exposed skin like the face, neck, and arms. The rash typically heals within two to three weeks, though in rare cases it can leave a lasting change in skin pigmentation. If you find elongated, earwig-like beetles in your home, avoid swatting them directly against your body. Brush or flick them away instead.
Ground Beetles
Ground beetles are another frequent source of confusion, particularly larger species with prominent mandibles. These strong jaws extend from the front of the head and can look like pincers at first glance. On an earwig, the forceps are at the opposite end of the body, projecting from the abdomen. That front-versus-back distinction is the fastest way to tell them apart.
Ground beetles also tend to be stockier and more heavily armored than earwigs. Their wing covers (elytra) run the full length of the abdomen, giving them a more compact, rounded shape. Earwig elytra are short, covering only part of the body, which leaves their segmented abdomen visible. Ground beetles are overwhelmingly beneficial insects that eat slugs, caterpillars, and other garden pests. Finding one in your house is no cause for concern.
Silverfish
Silverfish and earwigs turn up in the same places: bathrooms, basements, laundry rooms, and anywhere else moisture collects. Both are roughly the same size and move quickly when exposed to light, which makes a fast identification tricky.
The differences are clear once you look closely. Silverfish have a distinctive teardrop or carrot-shaped body that tapers sharply toward the tail. Their bodies are covered in tiny silvery scales that rub off easily, leaving marks on surfaces, similar to moth scales. Instead of two curved forceps, silverfish have three straight, hair-like filaments extending from their rear end. These filaments are soft and wispy, nothing like the hard, curved pincers on an earwig. Silverfish also never have wings, while some earwig species do (though they rarely fly).
Silverfish feed primarily on starchy materials like paper, book bindings, wallpaper paste, and certain fabrics. Earwigs are more generalist feeders that eat decaying plant matter, seedlings, and soft fruits. If you’re finding damage to books or stored papers, silverfish are the more likely culprit.
Two-Pronged Bristletails (Diplurans)
Diplurans are the insect most easily mistaken for earwigs because some species actually have cerci that resemble small pincers. These pale, eyeless insects live in soil and leaf litter, and you’ll occasionally find them under rocks, logs, or mulch. They’re usually smaller than earwigs, and their bodies are translucent white or pale tan rather than the dark brown of a typical earwig. The biggest giveaway is that diplurans are completely eyeless and avoid any light. If the bug you found has visible eyes and dark coloring, it’s an earwig.
How to Tell Quickly
When you find an unfamiliar bug in a damp corner of your home, run through these checks:
- Pincers at the back end, curved and hard: earwig.
- Large jaws at the front, stocky body: ground beetle.
- Long body, no pincers at all, raised abdomen: rove beetle.
- Three soft, hair-like tail filaments, silvery scales: silverfish.
- Pale or translucent body, no eyes, small pincers: dipluran.
Keeping Any of Them Out
Earwigs and most of their lookalikes share one thing in common: they need moisture. Earwigs feed most actively at night and spend daylight hours hiding in cool, damp spots like under boards, dense ground cover, leaf piles, or loose soil. They come indoors when outdoor conditions get too dry, too hot, or too cold.
Reducing moisture and eliminating hiding places handles the bulk of the problem for all of these species. Clear away leaves, boards, boxes, and debris near your foundation. Thin out dense ground cover and weeds around garden beds. Fix leaky outdoor faucets and ensure downspouts direct water away from the house. Indoors, a dehumidifier in a damp basement does more than any spray. Seal gaps around doors, windows, and utility lines to cut off entry points.
Trapping works well for earwigs specifically. A rolled-up damp newspaper or a short section of garden hose left out overnight will attract them. In the morning, shake the trap into a bucket of soapy water. This low-effort approach can significantly reduce a local population over a week or two without chemicals.