The centipede you’re likely encountering on Oahu is Scolopendra subspinipes, a large, fast, venomous predator that can reach up to 8 inches long. It’s not native to Hawaii. These centipedes were likely transported across the Pacific by migrating Polynesians centuries ago, and they’ve thrived in the islands’ warm, humid climate ever since. They’re the most common large centipede across the entire Hawaiian archipelago, and on Oahu specifically, encounters are frequent enough that the island’s pest control agencies track complaint patterns by district.
What They Look Like
Oahu’s giant centipedes have a reddish to reddish-brown body with yellow or yellow-orange legs. They have 22 body segments, each carrying one pair of legs, giving them that distinctive rippling movement. The head is covered by a flat shield and carries a pair of antennae used for sensing prey and surroundings. Most individuals measure somewhere between 4 and 8 inches, though a specimen captured in Hawaii in 2018 measured a startling 14.4 inches, far exceeding the previously accepted maximum.
The feature that matters most is a pair of modified front legs called forcipules, positioned right below the head. These aren’t technically fangs, but they function like them: sharp, claw-like appendages connected directly to venom glands. They’re the centipede’s primary weapon for both hunting and self-defense.
At least two other centipede species have been documented on Oahu. Scolopendra polymorpha, a smaller species, was identified from a single specimen at a pineapple plantation. Scolopendra morsitans has been recorded in Honolulu. But S. subspinipes is overwhelmingly the one you’ll run into.
Where They Live on Oahu
Centipedes are nocturnal hunters that spend daylight hours hiding in dark, damp spaces. Outdoors, that means under rocks, logs, piles of decaying leaves, wood debris, and dense ground cover. They’re carnivores that feed on spiders, crickets, and other insects, using their antennae to detect prey before striking and injecting venom to immobilize it.
Research from the University of Hawaii tracking centipede complaints across Oahu found that most activity was reported in leeward urban districts. The south urban areas from Hawaiiloa Ridge to Kalama Valley showed the highest number of complaints, with a line of activity along south and central districts bordering undeveloped lands. That border between developed neighborhoods and wild areas is a hotspot because centipedes move freely between natural habitat and residential property.
Seasonally, centipede activity on Oahu peaks during winter, summer, and fall, with spring showing relatively lower (but not absent) activity. During cooler months especially, centipedes venture indoors seeking warmth, turning up in basements, attics, crawl spaces, bathrooms, and anywhere else that’s dark and humid. Shoes left on the floor, piles of laundry, and cluttered storage areas are all common hiding spots.
What a Bite Feels Like
A centipede bite produces intense, sudden pain at the site. The wound itself typically appears as two small hemorrhagic marks in a V-shape, left by the paired forcipules. From there, you can expect swelling, redness, and a burning sensation. Some people experience numbness, tingling, throbbing, or a deep “sprained” feeling in the affected limb, sometimes with reduced range of motion. Hemorrhagic blisters can form, though this is less common.
Beyond the bite site, some people develop headache, nausea, dizziness, low fever, anxiety, chest discomfort, or palpitations. These systemic symptoms can be unsettling but are generally part of a painful yet self-limiting reaction. Most bites resolve within hours to a few days without lasting consequences.
The venom is not considered neurotoxic to humans, though it does trigger symptoms mediated by the nervous system, which is why you may feel effects beyond the immediate bite area. Serious complications are rare. A lethal dose would theoretically require the venom output of roughly 1,000 centipedes. The real risks are allergic reactions and secondary infections at the wound site.
Treating a Bite
Apply a cold pack to the bite to reduce swelling. Clean the wound thoroughly to prevent infection. Over-the-counter pain relief can help manage the discomfort, which tends to be worst in the first hour or two and then gradually fades.
Some residents swear by running the bite under hot water (as hot as you can tolerate without burning yourself), a method also used for some marine stings. The theory is that heat breaks down venom proteins. Evidence for this is anecdotal rather than clinical, but many people in Hawaii report it helps significantly with pain.
Seek emergency care if you experience difficulty breathing, wheezing, throat tightness, swelling of the face, lips, or tongue, difficulty speaking, persistent dizziness, or signs of a severe allergic reaction. These symptoms suggest anaphylaxis, which is rare but requires immediate treatment.
Keeping Centipedes Out of Your Home
Centipede prevention on Oahu comes down to two principles: eliminate entry points and remove the conditions they’re attracted to.
Start with the structure itself. Seal cracks, holes, and gaps around the exterior of your home, particularly at the foundation level and around pipes. Repair torn window screens and add weather stripping to doors and windows. Even small gaps are enough for a centipede to squeeze through.
Moisture is the biggest attractant. Fix water leaks promptly, run exhaust fans in bathrooms, and use dehumidifiers in basements or enclosed lanais. Centipedes need humid environments to survive, so drying out interior spaces makes your home far less appealing to them.
Inside, reduce clutter in basements, crawl spaces, attics, and closets. Every pile of stored items is a potential hiding spot. Outside, move firewood, leaf piles, and grass clippings well away from the house. Trim dense ground cover near your foundation, and keep landscaping debris from accumulating against exterior walls. That buffer zone between vegetation and your home’s perimeter makes a real difference, especially in the high-activity districts along Oahu’s south shore where developed land meets undeveloped terrain.
Perimeter insecticide treatments applied around door frames, window casings, baseboards, and the home’s exterior foundation can create an additional chemical barrier. For persistent problems, particularly in homes near undeveloped land, professional pest control may be worth the investment.