The Texas house centipede (Scutigera coleoptrata) is a fast-moving, long-legged arthropod that looks far more dangerous than it actually is. With a body only one to one and a half inches long but an overall appearance of three to four inches thanks to its sprawling legs and antennae, it’s one of the most startling creatures you can encounter darting across a bathroom floor. It’s also essentially harmless and actually helps control other pests in your home.
How to Identify a House Centipede
The house centipede has a distinctive look that’s hard to confuse with other insects once you know what to look for. Its body is a dirty yellow color with three dark longitudinal stripes running down its length. The legs are banded in alternating light and dark segments, and on adult females, the last pair of legs stretches to nearly twice the length of the body itself. That’s what gives house centipedes their wispy, almost feathery appearance as they move.
Adults have 15 pairs of legs, but they don’t start out that way. Newly hatched house centipedes emerge with just four pairs of legs. With each molt, they gain more: five pairs, then seven, nine, eleven, and thirteen through successive larval stages. After one more molt they reach 15 pairs as adolescents and keep that count through four additional molts into adulthood. So if you spot a smaller centipede with fewer legs, it’s likely a juvenile of the same species.
House Centipede vs. Texas Redheaded Centipede
Texas is home to two common centipede species, and telling them apart is straightforward. The Texas redheaded centipede (Scolopendra heros) is the largest centipede in North America, with a thick, robust body, bold red head, and 23 pairs of shorter, sturdier legs. It’s built like a tank. The house centipede, by contrast, is slender and fragile-looking, with long, delicate legs that make it appear larger than it is.
Both species produce venom that is irritating but not deadly to humans. The redheaded centipede’s sting is more painful, comparable to a bee sting that hurts for about an hour. It also has a reputation for being confrontational and enters homes frequently. The house centipede is far more timid. It avoids contact with people and only bites when directly handled or threatened. Its bite, when it does happen, is mild and poses no real threat.
Can House Centipedes Bite?
Technically, centipedes don’t bite at all. Instead, they use a pair of specially modified hollow front legs to pinch and deliver venom. In practice, house centipede stings to humans are rare because the creatures actively avoid people. When a sting does occur, symptoms are minor: localized redness, mild swelling, and short-lived pain at the puncture site.
If you do get stung, wash the area with soap and water to reduce infection risk, then apply ice wrapped in a cloth for 15 minutes at a time. An over-the-counter pain reliever can help with discomfort. The one thing to watch for is an allergic reaction. Signs include hives, dizziness, swelling of the mouth or throat, or difficulty breathing. If you know you’re prone to insect sting allergies, keep an epinephrine auto-injector accessible.
What They Eat
House centipedes are predators, and their diet is one of the best reasons to tolerate them. They hunt cockroaches, spiders, silverfish, and other small household pests. They’re fast enough to chase down prey across walls and floors, using their long legs and excellent speed to their advantage. Unlike the Texas redheaded centipede, the house centipede can live its entire life indoors, quietly working as a free pest control service in the dark corners of your home.
Why They Show Up in Your Home
House centipedes are drawn to three things: moisture, prey, and shelter. They prefer cool, dark, damp spaces that are rarely disturbed, which is why you’ll most often find them in bathrooms, basements, crawl spaces, and laundry rooms. If your home has a cockroach or spider population, that food supply alone can lure centipedes inside.
In Texas, seasonal extremes push them indoors more aggressively. During brutally hot, dry summers, outdoor conditions become inhospitable and centipedes seek the humidity inside your walls. During cold winter stretches, the warmth of a heated home draws them in to survive and reproduce. They enter through drains, foundation cracks, gaps around poorly sealed windows and doors, and any small hole in the exterior of the house.
How to Keep Them Out
Because moisture is the primary driver, drying out your home is the most effective control strategy. Fix leaking pipes and faucets, run exhaust fans in bathrooms and attics, and use a dehumidifier in basements or crawl spaces. A house centipede can’t thrive in dry conditions.
Remove hiding spots by clearing clutter in basements, attics, and storage areas. Outside, move leaf piles, grass clippings, and firewood away from your home’s foundation. These materials create exactly the cool, damp microhabitats centipedes love, and stacking them against the house is like rolling out a welcome mat.
Seal entry points by caulking cracks and gaps in your foundation, repairing torn window screens, and adding weather stripping to doors. This keeps out not just centipedes but also the cockroaches and spiders they feed on. Eliminating the prey population is one of the most reliable long-term strategies: if there’s nothing to hunt, centipedes lose interest in your home entirely.