Crickets move indoors for three basic reasons: dropping temperatures, bright lights near your home, and easy access to moisture and shelter. Fall is the peak season for indoor invasions, but depending on the species, crickets can show up year-round if your home offers what they need: warmth, dampness, darkness, and something to eat.
What’s Drawing Them Inside
The single biggest trigger is cooler nighttime temperatures. As summer fades, field crickets, house crickets, and camel crickets all start looking for warmer places to spend the winter. Your home is essentially a heated cave with snacks.
Outdoor lighting is the second major factor. Field crickets and house crickets are strongly attracted to lights at night, which pulls them toward your exterior walls, porches, and doorways. Once they’re right next to the building, slipping inside through a gap is almost inevitable. Camel crickets, on the other hand, aren’t drawn to light at all. They’re attracted to moisture and darkness, which is why they tend to show up in basements, crawl spaces, and garages rather than near well-lit entryways.
Moisture ties everything together. Crickets generally prefer cool, damp, dark habitats. A leaky basement, a humid crawl space, or even condensation around pipes creates exactly the environment they’re looking for. Crawl spaces with high humidity often support thriving camel cricket populations alongside other pests, because the damp conditions also encourage mold and decaying organic matter that crickets feed on.
Which Crickets You’re Probably Seeing
The type of cricket tells you a lot about the underlying problem. Field crickets are the most common fall invaders. They’re dark brown or black, about an inch long, and they’re the ones whose chirping keeps you up at night. Males chirp by rubbing their front wings together to attract females, and since they’re nocturnal, the sound peaks after dark.
House crickets look similar but are slightly smaller and yellowish-brown. Unlike field crickets, all life stages of house crickets can survive indoors year-round. If you’re finding crickets in winter or spring, house crickets are the likely culprit. They gravitate toward warm, dark spots behind appliances, inside wall voids, or under furniture.
Camel crickets (also called cave crickets) are the ones that startle people the most. They’re humpbacked, wingless, and have oversized hind legs that make them look like spiders at first glance. They don’t chirp, but they jump erratically when disturbed. You’ll typically find them in basements, crawl spaces, and utility rooms. Their presence is a reliable signal that you have a moisture problem, because the damp, cave-like conditions they need to thrive are the same conditions that encourage mold growth and wood decay.
Ground crickets are smaller and less common indoors, but the warmth of buildings can occasionally trigger large-scale invasions. Mole crickets, which normally live underground and feed on plant roots, sometimes wander inside during mating flights but rarely establish themselves indoors.
How They’re Getting In
Crickets don’t need much space to enter. They exploit the same structural gaps that let in cold air: cracks in the foundation, gaps around door frames, poorly sealed windows, spaces where utility pipes or wires penetrate exterior walls, and torn or missing door sweeps. Garage doors that don’t sit flush against the concrete are especially common entry points.
Once near your home (drawn by lights or seeking warmth), they hide in dark, protected locations behind objects, inside cracks, and along baseboards. If you’re seeing crickets in living areas upstairs, they likely entered at ground level and moved through wall voids or along plumbing chases to find the warmth and humidity they prefer.
The Damage They Can Do
A couple of crickets are mostly just annoying. A larger population, though, can cause real damage. Crickets are omnivores that chew on fabrics, including cotton, linen, wool, silk, and fur. They’re especially attracted to clothing and upholstery soiled with perspiration or food stains. In a heavy infestation, you’ll find frayed edges, small holes, and weakened spots in carpets, curtains, and clothes.
They also eat paper, cardboard, wallpaper, and other dead insects. Their droppings leave small brown or black stains on fabrics and surfaces. If you’re noticing tiny dark marks on stored clothing or curtains alongside roughened or chewed patches of fabric, crickets are the likely cause. Under magnification, the chewed edges show tiny mandible marks less than a millimeter wide.
Signs of an Active Problem
The chirping is the most obvious clue, but only some species chirp. Male field crickets and house crickets produce a rhythmic “calling song” at night. If you hear it consistently from inside your walls or from a particular room, you likely have a breeding population rather than a stray visitor.
Other signs include finding shed skins (crickets molt as they grow), spotting dark droppings near baseboards or in closets, and discovering chewed fabric or paper. Camel cricket infestations are often discovered in crawl spaces or basements when homeowners notice dozens of the insects clustered in corners or along foundation walls.
Getting Rid of Them
Sticky glue traps are the simplest first step. Place them along baseboards, in corners, near doorways, and in any dark areas where you’ve seen activity. Pre-baited traps with fruity scent attractants are widely available and work well for crickets. They’re non-toxic, which makes them a good option if you have pets or children. The traps also help you gauge how many crickets you’re dealing with and where they’re concentrated.
For crickets you can see, a vacuum cleaner is effective and immediate. Empty the canister or bag outside afterward. Reducing clutter in basements, garages, and closets removes the dark hiding spots crickets depend on. Dispose of cardboard boxes and paper stacks, which crickets readily chew on and shelter under.
Keeping Them Out for Good
Prevention comes down to eliminating the three things that attract crickets: easy entry, excess moisture, and nighttime lighting near the building.
- Seal entry points. Caulk cracks in foundations and around window frames. Install or replace door sweeps on exterior doors. Fill gaps where pipes and wires enter the house. Check weatherstripping on garage doors.
- Reduce moisture. Fix leaky pipes and faucets. Use a dehumidifier in basements and crawl spaces, aiming to keep humidity below 60%. Ensure gutters drain away from the foundation. Improve ventilation in crawl spaces.
- Adjust outdoor lighting. Switch exterior lights to yellow or amber “bug lights,” which are far less attractive to insects than standard white bulbs. Move lights away from doors when possible, or use fixtures that direct light downward rather than outward.
- Clear the perimeter. Move firewood, mulch, stones, and leaf piles away from the foundation. These are exactly the cool, damp hiding spots crickets use outdoors before migrating inside. Keep vegetation trimmed back from exterior walls.
- Reduce indoor food sources. Store woolens and linens in sealed containers. Clean up crumbs and food spills promptly. Wash soiled clothing rather than leaving it in open hampers, since perspiration-stained fabric is particularly attractive to crickets.
If you’re dealing with camel crickets in a crawl space, the moisture issue is the core problem. Encapsulating the crawl space with a vapor barrier and adding a dehumidifier will make the environment inhospitable not just to crickets but to the mold and secondary pests that come with chronic dampness.