Centipede Control in South Florida: House Centipedes, Florida Blue Centipedes, and What to Do

The fast, long-legged centipede you see sprinting across your bathroom floor is almost certainly a house centipede (Scutigera coleoptrata). House centipedes have: (1) Very long legs — 15 pairs (30 legs total) that extend far beyond the body width, giving them their characteristic 'spider-like' appearance. (2) High speed — house centipedes move extremely fast and can change direction rapidly, which makes them alarming to encounter. (3) Antennae as long as legs — they have long antennae at both ends that further exaggerate their apparent size. (4) Grayish-yellow striped body — about 1–1.5 inches long for the body, though legs extend this significantly. House centipedes are not the same as the Florida blue centipede — they are smaller, faster, more commonly found indoors, and far less likely to bite. House centipedes are actually beneficial, feeding on other household pests (silverfish, cockroaches, ants, spiders, termites). The case for leaving them alone is stronger than the case for eliminating them, though most people's instinct is obviously the opposite.

It depends on the species: (1) House centipedes — technically can bite with their venomous front legs (forcipules), but almost never do. They prefer to run. On the rare occasion they bite, the effect is similar to a bee sting — brief sharp pain, possible local swelling that resolves within hours. Not medically significant for most people. (2) Florida blue centipedes — YES, these bite and it hurts. Florida blue centipedes are larger (3–5 inches), orange-legged, and produce a more painful bite with local swelling that can persist for hours. They rarely bite unless trapped (inside a shoe, under a piece of clothing pressed against the skin). No antivenom exists because it's not needed — even Florida blue centipede bites are almost never medically serious, though they're significantly more painful than house centipede bites. (3) Allergic reactions — in rare cases, individuals with hymenoptera venom allergy may have cross-reactive responses to centipede venom. If you experience swelling, hives, or difficulty breathing following a centipede bite, seek medical attention. (4) For children and pets — the above applies. Florida blue centipede bites in children produce the same local reaction but children may have more significant pain response. Rare pet encounters with centipedes can produce localized swelling, usually not serious.

Centipedes follow moisture and prey: (1) Bathroom moisture — house centipedes are strongly moisture-dependent and concentrate in the highest-humidity rooms in your home: bathrooms, under-sink cabinets, laundry rooms. They often emerge from drains and live in wall voids near plumbing. (2) Foundation moisture — exterior mulch, landscape irrigation, and foundation moisture draw centipedes to the home exterior, where they find cracks and gaps to enter. (3) Prey availability — centipedes are predators that follow their food supply. Homes with high populations of silverfish, cockroaches, ants, spiders, or other prey insects will sustain larger centipede populations. Addressing the underlying prey pest population often reduces centipede numbers. (4) Mulch at foundation — moist organic mulch immediately adjacent to the foundation creates the combined moisture and prey (silverfish, roaches, earwigs) environment that attracts centipedes in South Florida. The same mulch-gap recommendation (12–18 inches bare soil at foundation) that reduces roaches and earwigs also reduces centipedes. (5) Cracks and voids — centipedes need narrow sheltered spaces to rest during daylight. Foundation cracks, expansion joints, and gaps around plumbing penetrations provide both entry routes and daytime harborage.

Centipede control is primarily a habitat and perimeter management problem: (1) Reduce moisture — the single most effective centipede deterrent is reducing high-humidity microenvironments at and inside the home: fix leaking faucets and pipes, improve bathroom ventilation, use a dehumidifier in consistently wet areas, ensure HVAC condensate drains away from the foundation. (2) Exterior perimeter spray — professional residual insecticide applied along the foundation base, around window and door frames, and into mulched areas kills centipedes crossing the treated zone and reduces their prey population simultaneously, producing compound benefit. (3) Pull mulch from foundation — mulch harbors both centipedes and their prey. Creating a dry bare-soil band (12–18 inches) at the foundation eliminates this habitat immediately adjacent to entry points. (4) Seal entry points — caulk gaps around plumbing penetrations at the foundation level, install door sweeps, and seal expansion joint gaps. Centipedes squeeze through very small openings. (5) Reduce indoor prey — addressing other household pests (silverfish, roaches, ants) removes the food source that supports centipede populations. Our Pest Shield perimeter service covers the prey pests as well as centipedes themselves. (6) Note on house centipedes: if you can tolerate their presence, house centipedes actually provide net pest control benefit by eating other insects. But if you'd rather not have them in your home — which is completely understandable — the above perimeter approach is the most effective elimination strategy.

Yes — centipedes are covered by our Pest Shield perimeter service. The exterior foundation treatment, mulch-area application, and entry-point treatment creates the residual kill zone that stops centipedes from crossing into your home. For homes with persistent centipede presence, we also address the prey pest population that sustains them — because eliminating the food source is the most durable way to reduce centipede population over time. If you're seeing centipedes inside your home frequently, this is typically an indicator of multiple overlapping pest pressures — centipedes, plus the silverfish, roaches, or other prey pests they're following. Our assessment evaluates all of these simultaneously. Call 561-443-3333 or get your free assessment at the link below.