You flip on the closet light and catch a long black body with a red head and yellow legs disappear behind a box before you can get a good look. That’s almost certainly a red centipede in Texas, the giant redheaded centipede, the largest centipede species in North America, and one of the more startling bugs you’ll find indoors. Its size and bright coloring make it impossible to miss, but most encounters end with nothing worse than a startled homeowner. This guide covers how to identify a red centipede, what happens if one bites, and the steps that keep them from showing up again.
Key Takeaways
- A black body with a red head and yellow legs is the easiest way to tell a giant redheaded centipede apart from millipedes or house centipedes.
- The bite stings like a bee and causes temporary swelling, but it has never been tied to a confirmed human death in Texas.
- Damp soil, leaf litter, and a steady supply of roaches or spiders near your foundation are usually what pulls a centipede indoors.
- Sealing entry points and cutting back insect activity outside does more to keep centipedes away than trying to catch each one that gets in.
What Is the Red Centipede Found in Texas?
The red centipede most homeowners run into in Texas is commonly called the giant redheaded centipede. It’s a fast-moving, predatory bug that spends most of its time outdoors, but it occasionally wanders inside while hunting.
Size and Coloring
These centipedes average about 6 ½ inches in length and may reach nearly 8 inches in some cases. The body is typically black with a chestnut-red head, and the first couple of segments behind it, and the legs run bright yellow down most of its length. This bright pattern is known as aposematic, or warning, coloration, thought to advertise the centipede’s confrontational nature to potential predators.
Where They Show Up in Texas
This isn’t a rare or regional bug. The same species also turns up in Arkansas, Missouri, Louisiana, Kansas, Oklahoma, New Mexico, Arizona, and northern Mexico, in addition to Texas. Within the state, they tend to get the most attention in the Hill Country and the Panhandle, but their habits explain why they show up elsewhere too.
The Texas Parks and Wildlife Department notes that centipedes generally prefer moist or humid spaces. That’s why mulch beds, leaf litter, and damp soil close to a foundation are common places to find one, no matter which part of Texas you’re in.
How to Identify a Red Centipede
A few features make this species easy to tell apart from other Texas centipedes and from millipedes:
- A black or dark body paired with a red or orange head and antennae
- Long, yellow, claw-tipped legs, one pair per body segment
- A flattened, fast-moving body that can squeeze through narrow gaps
- A pair of pincer-like legs near the head used to grip and inject venom into prey
Centipede or Millipede?
Millipedes are often mistaken for centipedes, but move more slowly, have a rounded body, and carry two pairs of legs per segment instead of one. House centipedes, the smaller pale gray species sometimes seen indoors, are a different bug entirely and not related to the red-headed variety.
Red Centipede Bites: Safety Tips
A bite hurts, but it’s rarely more serious than a bee sting.
What a Bite Feels Like
A centipede bite is described as similar to a bee sting, and allergic reactions can occur in some people. Older documented accounts back that up. In one early test of the venom, an entomologist let a centipede bite his finger for several seconds. The pain was sharp and localized, started fading within about 15 minutes, and was mostly gone within a few hours, though some swelling lingered. In rarer cases, bites have been linked to minor skin necrosis, dizziness, nausea, or headaches.
If You or a Pet Gets Bitten
If you’re bitten, wash the area with soap and water and apply a cold compress to help with swelling. Most bites resolve on their own within a few hours. Anyone with a severe or worsening reaction, especially signs of an allergic response such as widespread swelling or trouble breathing, should seek medical care.
Pets are more vulnerable than adults, since a bite to a small dog or cat’s face or paw can cause significant swelling. If a pet is bitten, a quick call to your veterinarian is worth the peace of mind.
Why Centipedes End Up Inside Texas Homes
Red centipedes are nocturnal hunters that spend their days tucked under rocks, logs, mulch, or leaf litter, emerging at night to chase down roaches, crickets, spiders, and other insects. They’re often active during the day as well, and they occasionally end up inside while following prey, so an indoor sighting isn’t unusual.
A centipede indoors is rarely a sign of an infestation on its own. More often, it’s a single hunter that followed a food source through a gap in the foundation, a torn screen, or a poorly sealed door.
Preventing Red Centipedes Around Your Property
Most centipede problems trace back to moisture and an easy way inside, so prevention works best when it targets both at once.
Reduce Outdoor Hiding Spots
- Clear leaf piles, mulch, and woodpiles away from the foundation, since these are prime daytime hiding spots.
- Fix leaky spigots, gutters, and AC condensation lines that keep soil near the house damp.
Seal the Way In
- Seal cracks in the foundation, weatherstrip doors, and repair torn window screens.
- Reduce indoor insect populations, since centipedes follow their food. Fewer roaches and spiders mean less reason for a centipede to come inside.
Because red centipedes prey on other pests, a property with a lighter insect load overall tends to see fewer centipedes too.
When to Call a Professional
One centipede crossing the garage floor isn’t a reason to call anyone. It’s worth paying closer attention if centipedes are showing up indoors more than once or twice a season, rather than just after a heavy rain. The same goes for sightings that keep happening in the same spot, like a bathroom or laundry room, since that usually points to a steady moisture source.
Roaches, crickets, or spiders turning up alongside the centipedes are another signal, since that’s the food supply drawing them in. And if you’ve checked for obvious gaps and cracks but can’t find or seal the entry point yourself, that’s worth a second set of eyes too. Any of these point to an ongoing moisture or insect issue rather than a one-time visitor, and that’s when a professional inspection does more than another round of sealing and cleanup.
Red Centipedes: Bottom Line
A red centipede in the house is usually just doing what it does outside: hunting insects in a spot that happens to have water and food nearby. The bite is unpleasant but short-lived, and pets are the only ones who need extra caution. What draws a centipede inside is the roaches, spiders, and crickets already living around your home, and that insect activity, not the centipede, is the actual target worth addressing.
PCI Pest Control homes with family- and pet-friendly treatments. Our technicians can identify the conditions attracting pests and recommend the right treatment plan. If red centipedes keep appearing around your home, PCI Pest Control can inspect your property for the moisture, entry points, and insect activity attracting them, then recommend the right treatment plan to reduce the conditions that allow them to return.
Frequently Asked Questions
Are red centipedes in Texas poisonous?
They’re venomous rather than poisonous, meaning the toxin is delivered through a bite rather than by touch or ingestion. The venom causes localized pain and swelling similar to a bee sting and is not considered medically dangerous to healthy adults.
How big do red centipedes get in Texas?
Giant redheaded centipedes typically reach 6 to 8 inches long, making them the largest centipede species in North America. Some individuals, particularly in captivity, have been reported even longer.
What attracts red centipedes to a house?
Moisture and a steady food supply are the main draws. Damp crawl spaces, leaky outdoor fixtures, and a healthy population of roaches, crickets, or spiders nearby all make a home more appealing to a hunting centipede.
Should I kill a red centipede I find outside?
Not necessarily. Outdoors, red centipedes help control populations of roaches, spiders, and other insects, so many homeowners simply relocate them with a jar or broom rather than killing them. Indoors, removal is reasonable, but addressing the moisture or insect issue that drew it in matters more for the long term.
Can a red centipede bite kill a pet?
A bite is unlikely to be fatal to most pets, but it can cause significant pain and swelling, especially in small dogs or cats bitten on the face or paw. Contact a veterinarian if a pet is bitten and shows signs of distress.
