The Fall Pests Sneaking Into California Homes

A cricket in the garage, an earwig in the shower, something silver darting behind the pantry shelf. These are not infestations. They are what the industry calls occasional invaders: bugs that live outside all year and wander in when the weather changes. Almost all of them come in through a gap you can close and stay because of moisture you can dry out. Our pest prevention services cover the perimeter treatment that keeps them outside, but a lot of this is fixable in an afternoon.

Fall is their season because of what happens to their habitat. Landscape irrigation gets dialed back, the soil dries out, nights cool off, and the first rain floods what was left. Every one of those changes makes a house look better than a yard.

Who actually shows up, and what each one means

They get lumped together, but they tell you different things about your house.

Crickets turn up in garages, laundry rooms, and along the base of exterior walls. They are drawn to light and to moisture, and if you can hear one chirping at 2am it is almost always in a garage corner or under a water heater. Harmless, mostly a noise complaint. Field crickets outside your door means dense ground cover or mulch right up against the wall.

Earwigs are the ones with the pincers, and they scare people more than they should. They do not crawl into ears, they cannot hurt you, and they are looking for damp. Finding them in a bathroom, under a sink, or in a bath towel points at a moisture problem: a slow leak, a wet crawlspace, or irrigation spraying the foundation.

Silverfish are the flat, fast, silvery ones in pantries, bookshelves, bathrooms, and closets. They eat starch, so paper, cardboard, book bindings, wallpaper paste, and dry pantry goods are the draw. They also need high humidity, so a silverfish problem is almost always also a humidity problem. We covered them in depth in how to get rid of silverfish in your Orange County home.

House centipedes are the long, many-legged ones that sprint across a bathroom floor. Unnerving, genuinely harmless, and they eat other insects. Here is the useful part: centipedes are predators, so a house with centipedes has something for them to hunt. They are a symptom worth reading.

Pillbugs and sowbugs roll up when touched and live in the wet layer under mulch and stones. They die quickly indoors because it is too dry, so finding them inside usually means they came in under a door with a worn seal.

Springtails are tiny and jump when disturbed, often mistaken for fleas. They show up around sinks, tubs, and potted plants and are a straight moisture indicator.

Two patterns run through that whole list: they came through a gap, and they stayed because something was damp.

Where they get in

The routes are boring and consistent. Once you know them you stop being surprised.

Gaps under exterior doors, especially side gates, garage service doors, and laundry room doors where the sweep has flattened out. Torn window and door screens. Weep holes and utility penetrations where pipes and conduit enter the wall. Unsealed gaps around the AC line set. The bottom corners of the garage door. Foundation cracks and expansion joints. Bathroom and kitchen pipe penetrations under cabinets, which is how something in the wall void ends up in your cupboard.

Walk the house once with a flashlight at dusk and you will find most of yours. If light gets out, a cricket gets in.

Fixing it: dry it out, then seal it up

Moisture is the lever that matters most, because nearly all of these pests need it to survive indoors.

Start with irrigation. Sprinklers hitting the foundation or the stucco is the most common cause we find, and moving a few heads or shortening a run fixes it. Then fix dripping hose bibs, check under sinks for slow leaks, run the bathroom fan long enough to actually clear the humidity, and use a dehumidifier in a laundry room or garage that stays damp.

Outside, pull the mulch, gravel, and ground cover back so there is a dry band of bare soil against the foundation. That gap alone kills the habitat crickets, earwigs, and pillbugs need to sit against your wall.

Then close the openings. Replace worn door sweeps and weatherstripping, patch screens, seal utility penetrations with caulk or steel wool and caulk, and fill foundation cracks. This is the same sealing work that keeps rodents out, which is worth knowing because the rodent control and exclusion work we do in fall closes most of these routes as a side effect.

Inside, move pantry starches into sealed containers, get cardboard boxes off the floor of closets and garages, and swap white porch bulbs for warm yellow ones so you are not drawing crickets and moths to the door in the first place.

Read the bug, not just the bug

The most useful thing about occasional invaders is what they tell you. A steady trickle of earwigs and springtails is a moisture message. Centipedes mean there is prey. Silverfish in a closet means humidity plus paper. Crickets at the garage door mean ground cover against the wall.

Fix the condition and the pest leaves on its own. Spray without fixing the condition and you will be spraying again in three weeks. That is also why these come with spiders: dense damp landscaping produces the insects, and spiders follow the insects to your eaves.

When it is worth calling someone

One cricket in the garage is not a service call. Call us when you are seeing the same pest repeatedly in the same room, when you find silverfish or springtails in numbers that suggest a moisture source you cannot locate, or when you have sealed and dried and they keep coming.

A recurring exterior treatment handles this category better than anything else, because it puts a treated band between the habitat and your wall and it goes on the schedule instead of waiting for you to notice. That is what our pest prevention plan is: monthly, bi-monthly, or quarterly exterior perimeter work, web removal, and interior treatment only where it is needed. No long-term contract, and free retreatments if something shows up between visits.

Call (949) 943-5000 or request your free quote and we will walk the property, find the moisture and the gaps, and tell you which of these you actually have.

Frequently asked questions

What are occasional invaders?

Pests that live outdoors year-round and only come inside when conditions change, usually in fall and after rain. Crickets, earwigs, silverfish, house centipedes, pillbugs, and springtails are the common ones in California. They do not breed indoors in large numbers the way ants or roaches do.

Why do bugs come in the house in the fall?

Their outdoor habitat dries out as irrigation drops off, nights get cooler, and the first rains flood the soil. A house is warmer, more stable, and often damper in the right spots. Most enter through gaps under doors, torn screens, and unsealed utility penetrations.

Are earwigs dangerous?

No. They do not crawl into ears and their pincers cannot break skin. They can nip plants in a garden, but indoors they are only a nuisance and a sign of excess moisture.

Why do I keep finding silverfish in my bathroom?

Humidity plus starch. Bathrooms hold moisture and offer paper, cardboard, and toiletry packaging. Running the fan longer, fixing leaks, and getting cardboard out of the cabinet usually solves it.

Do house centipedes mean I have other bugs?

Usually, yes. Centipedes eat insects, so a steady presence suggests something else is living in the house for them to hunt. Treating the centipede alone misses the point.

Will one treatment get rid of them?

A treatment cuts the numbers quickly, but if the moisture and the gaps stay, they come back. Lasting results come from fixing irrigation, sealing entry points, and putting the exterior on a recurring schedule.