Earwigs are outdoor insects that live in cool, dark, moist hiding spots in your yard. When they show up inside your home, they’ve almost always wandered in from just outside your walls, drawn by moisture, shelter, or light. They don’t breed indoors or infest homes the way ants or roaches do. Understanding where they naturally live and what pulls them inside makes them much easier to deal with.
Their Geographic Origins
The European earwig, the species most people in North America encounter, is native to western Eurasia. It was introduced to North America, Australia, and New Zealand, where it adapted quickly and became abundant. Globally, there are roughly 2,000 known earwig species, with the greatest diversity concentrated in tropical South America, tropical Africa, and tropical and subtropical Asia. Diversity drops off steadily as you move away from the equator toward the poles.
So if you’re in the U.S., Canada, or Australia, the earwigs in your garden aren’t native. They’re an introduced species that found irrigated lawns and mulched garden beds to be a perfect substitute for their original European habitat.
Where Earwigs Live Outdoors
Earwigs need moisture. They feed at night and spend the day hiding in dark, damp spots: under loose soil, beneath boards or stones, inside dense groundcover, in leaf litter, under bark mulch, and within damaged fruit or flowers. Rich garden soil with a southern exposure is a favorite egg-laying site. Woodpiles, the base of trees, fence lines, ivy climbing up walls, and even newspapers left outside all serve as shelter.
In naturally dry climates like much of California or the American Southwest, earwigs wouldn’t thrive without the moisture and shade that irrigated gardens create. Your sprinkler system and mulch beds are essentially building earwig habitat. Moist summers tend to produce higher populations, while dry conditions push them to seek water elsewhere, including inside your home.
Why They End Up Inside Your House
Earwigs don’t come indoors to colonize. They enter for three reasons: moisture, shelter, and food. Bathrooms, kitchens, and laundry rooms attract them because of humidity and water droplets, especially during outdoor droughts. Extreme heat or cold drives them toward the stable temperatures inside your walls. And organic debris, crumbs, or pet food left out can keep them around once they’re in.
They also tend to be attracted to lights at night, which can draw them toward doorways and windows. From there, getting inside is easy. Common entry points include:
- Gaps between your foundation and exterior walls
- Doors or windows without screens
- Openings around utility lines where pipes or wires enter the structure
- Crawl space vents or damaged subflooring
- Items brought inside, like potted plants, outdoor furniture, or firewood
That last one catches people off guard. You might not have an entry point problem at all. The earwig may have simply hitchhiked in on a planter you moved to the kitchen.
Their Life Cycle and Reproduction
European earwigs lay between 30 and 80 eggs during winter, typically around December. The mother deposits them in a small underground burrow in the soil and then does something unusual for an insect: she stays with them. She cleans, repositions, and protects the eggs throughout an incubation period of about 50 days. This level of maternal care is rare among insects and is one reason earwig populations can establish themselves so successfully in new environments.
After hatching, the young earwigs (called nymphs) look like smaller, paler versions of adults. They go through several molts before reaching full size. By late spring and into summer, populations peak, which is when most people start noticing them in gardens and homes.
What They Eat
Earwigs are scavengers and opportunistic feeders. They eat decaying plant material, soft fruit, flower petals, seedlings, and other small insects like aphids and mites. This dual diet makes them both a minor garden pest and a quiet helper. They can damage young plants and chew holes in leaves or petals, but they also consume pest insects and break down organic debris in the soil.
The feeding happens almost entirely at night. If you’re seeing irregular holes in flower petals or soft fruit and suspect earwigs, go out with a flashlight after dark. You’ll likely find them actively feeding on the damaged plants.
The Pincers and the Ear Myth
The name “earwig” comes from the Old English words “Δ“are” (ear) and “wicga” (insect), rooted in an ancient European superstition that earwigs burrow into sleeping people’s ears and eat their brains. That superstition is completely unfounded. Earwigs have no interest in human ears and no ability to burrow into anything beyond soft soil.
That said, earwigs occasionally do crawl into ears, the same way any small insect might. A documented case published in the journal Cureus described a 24-year-old man who woke with ringing and pain in his left ear. Examination revealed a live earwig in his ear canal. This is rare, not dangerous, and easily resolved. The insect simply wandered into a dark, warm crevice, exactly the kind of space it gravitates toward naturally.
The pincers on their rear end look intimidating but pose little threat. Earwigs use them for defense against predators and for grasping during mating. They can also release a foul-smelling liquid from abdominal glands when threatened. A pinch from an earwig might briefly sting, but it won’t break the skin in most cases and carries no venom.
Keeping Them Out
Since earwigs come from the habitat immediately surrounding your home, prevention starts with your yard. Removing their daytime hiding spots is the most effective step. Clear away ivy growing against exterior walls, leaf litter, ground-level debris, bark mulch piled against the foundation, and stacked wood or newspapers stored outdoors. Pay attention to gutters, as leaves trapped there create a perfect moist, dark shelter right at roof level.
To block entry, seal cracks in your foundation, apply weatherstripping around doors and windows, and use caulking or expanding foam around utility line openings. If you use mulch in garden beds near the house, keep it thin and pulled back a few inches from the foundation wall. Reducing irrigation near the home’s perimeter also helps by making the area less hospitable.
Trapping works well for active populations. Rolled-up damp newspaper or short sections of garden hose left on the ground overnight will collect earwigs by morning. You can then shake them into a bucket of soapy water. Done consistently for a week or two, this can noticeably reduce the local population without any chemical treatment.