Few pests cause as much surprise as a house centipede sprinting across the floor. With their dozens of long legs and lightning-fast speed, they can be unsettling to find indoors.
The interesting thing about house centipedes is that they often aren't the real problem. In many cases, they're a sign that your home is providing something they need, and that usually means moisture, other insects, or both.
What Is a House Centipede?
House centipedes are easily recognized by their unique appearance.
Common identifying features include:
• Long, narrow body
• Numerous long, delicate legs
• Grayish-yellow to brown coloration
• Dark stripes running along the body
• Long antennae
• Extremely fast movement
Unlike many household pests, house centipedes are predators that hunt other insects rather than feeding on food stored in your home.
Why Are They Inside?
House centipedes are constantly searching for two things:
• Moisture
• Prey
They thrive in areas where humidity is higher and insects are readily available as a food source.
Common areas where homeowners find house centipedes include:
• Basements
• Bathrooms
• Laundry rooms
• Crawlspaces
• Utility rooms
• Garages
• Damp storage areas
If conditions are favorable, they may remain active indoors throughout the year.
What Do House Centipedes Eat?
Unlike ants, cockroaches, or rodents, house centipedes are hunters.
Their diet commonly includes:
• Spiders
• Ants
• Silverfish
• Cockroaches
• Flies
• Small insects and other arthropods
What this means for homeowners is that house centipedes often indicate another insect population is already present.
A home that supports spiders, silverfish, or other small insects may also support house centipedes.
Are House Centipedes Dangerous?
House centipedes are generally considered nuisance pests.
They do not:
• Damage structures
• Eat stored food
• Spread food contamination like rodents or cockroaches
Their biggest impact is usually the discomfort homeowners feel when seeing them unexpectedly.
While house centipedes can bite if handled, this is uncommon and most people will never experience it.
Why Moisture Plays a Major Role
One of the strongest predictors of house centipede activity is moisture.
Conditions that may attract them include:
• Plumbing leaks
• Damp basements
• Poor ventilation
• High humidity levels
• Condensation around pipes
• Water intrusion issues
The more moisture available, the more attractive the environment becomes, not only for house centipedes but also for the insects they hunt.
Quick Tips to Help Reduce House Centipedes
✓ Repair plumbing leaks promptly
✓ Reduce excess humidity indoors
✓ Use a dehumidifier in damp areas
✓ Improve ventilation where possible
✓ Reduce clutter in storage spaces
✓ Seal cracks and gaps around the home
✓ Address other insect activity indoors
Reducing moisture and controlling their food supply are often the most effective long-term solutions.
What This Means for Homeowners
Finding an occasional house centipede doesn't necessarily mean you have an infestation. However, repeated sightings may indicate moisture issues or an underlying insect population that's helping support them.
By reducing excess moisture and addressing other pest activity, homeowners can often make their homes much less attractive to house centipedes over time.
At Great North Pest Control, we help homeowners identify the conditions that support pest activity and develop practical solutions designed to keep homes protected year-round.