Centipedes
Identification
Some centipede species are brightly coloured, while others have dull hues of brown or grey.
The smallest centipedes measure less than an inch, while the largest can grow up to a 1/2-foot long.
Centipedes are characterized by their elongated bodies, divided into numerous segments. The number of segments varies depending on the species, ranging from 15 to more than 300. Each segment has a pair of legs, making centipedes one of the leggiest animals on earth. The body structure of centipedes is designed for movement, and they can move very quickly due to their numerous legs.
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Centipedes are elongated arthropods with flattened bodies and multiple pairs of legs. They are often found in damp, dark places, such as basements, bathrooms, crawl spaces and areas beneath stones or fallen leaves. Although their appearance can be unsettling, most centipedes found around homes are more interested in hunting small insects and other invertebrates than interacting with people.
Centipedes may enter a house when outdoor conditions change, moisture levels rise or prey becomes available indoors. Finding one does not automatically mean you have a serious infestation. However, repeated sightings can indicate favourable hiding conditions, excess moisture or an underlying insect problem.
Understanding what centipedes look like, where they live and why they enter buildings can help you decide how to manage them. This guide explains centipede behaviour, common hiding places, prevention methods and when professional pest control may be appropriate.
What are centipedes? What do they look like?
Centipedes belong to the class Chilopoda. They are arthropods, which means they have segmented bodies, jointed legs and an external skeleton. They are not insects, even though they are commonly grouped with household pests.
Unlike insects, which have six legs, centipedes have one pair of legs attached to most body segments. Their bodies are usually narrow and elongated, allowing them to move through small gaps and hide in confined spaces.
Centipedes are predators. They feed on small animals, including insects, spiders and other invertebrates. Their front appendages are modified into venom-delivering structures that help them capture prey.
Most household centipedes avoid people and try to escape when disturbed. Their presence can be unpleasant, but they also play a role in controlling populations of smaller arthropods.
Are Centipedes Insects?
No. Centipedes are not insects. Both groups belong to the larger animal group known as arthropods, but they have important differences. Insects have three main body regions, six legs and usually one pair of antennae. Centipedes have elongated, segmented bodies with many pairs of legs and one pair of antennae.
Centipedes are also different from millipedes. Millipedes generally have rounded bodies and two pairs of legs on most body segments. They tend to feed on decaying plant material, while centipedes are active predators. These differences can help homeowners identify which animal they have found and determine whether further investigation is necessary.
What Do Centipedes Look Like?
Centipedes vary in size, colour and body shape depending on the species. Many have flattened bodies, long antennae and numerous legs extending from the sides of their bodies.
Common colours include yellowish brown, reddish brown, grey and darker brown. Some species have more noticeable markings, while others appear relatively uniform in colour.
Their legs are often easy to see when they move across a wall or floor. Centipedes can move quickly, making them difficult to catch or examine closely.
Common Physical Features
Look for these characteristics when identifying a possible centipede:
Elongated body: The body is divided into many segments.
Multiple pairs of legs: Most body segments have one pair of legs.
Long antennae: These help the animal sense its surroundings.
Fast movement: Many centipedes move quickly when searching for prey or escaping danger.
Predatory front appendages: Modified front legs help capture prey and deliver venom.
Variable colour: Depending on the species, the body may be pale, yellowish, reddish or dark.
Avoid handling an unfamiliar centipede to confirm its identity. If identification is important, take a photograph from a safe distance.
What Is a House Centipede?
The house centipede (Scutigera coleoptrata) is a species commonly associated with buildings. It has a slender body, long legs and long antennae. Its legs can make it look much larger than its body actually is.
House centipedes are usually yellowish grey or brown, with darker markings and banded legs. They can run quickly across walls, floors and ceilings. They are predators that feed on insects and other small arthropods. Although their appearance may alarm homeowners, they generally avoid people.
A house centipede may be seen in a basement, bathroom, laundry area or other location where moisture and prey are available. Occasional sightings do not necessarily indicate a large population, but frequent encounters are a reason to investigate the conditions that support them.
Where Do Centipedes Live?
Centipedes need suitable shelter, access to prey and conditions that support their survival. Many prefer damp, sheltered environments where they can avoid drying out and remain hidden during the day.
Outdoors, they may live beneath rocks, logs, leaf litter, mulch, garden debris and other materials close to the ground. Some species also occupy soil crevices and spaces beneath tree bark.
Inside buildings, centipedes can hide in areas that are rarely disturbed.
Common Indoor Hiding Places
Centipedes may be found in:
Basements and unfinished lower levels
Bathrooms and laundry rooms
Crawl spaces and utility areas
Storage rooms and cluttered corners
Cracks along walls and floors
Spaces beneath sinks or near plumbing
Areas around foundation walls
Dark spaces containing other small arthropods
Not every sighting means the exact hiding place has been identified. A centipede seen in a bathroom, for example, may have entered from another part of the building.
Inspect the surrounding area for moisture, cracks, gaps and signs of other insects rather than assuming the animal lives where it was spotted.
Can Centipedes Live Outside?
Yes. Many centipedes naturally live outdoors, where they help regulate populations of smaller invertebrates. Gardens, wooded areas and damp spaces provide shelter and hunting opportunities. Centipedes may become more noticeable when outdoor habitats are disturbed or when weather conditions change.
You do not need to eliminate every centipede from your yard. The more practical goal is to reduce the chance of unwanted entry into your home by managing debris, sealing gaps and addressing moisture around the building.
Why Do Centipedes Enter Homes?
Centipedes may enter homes for several reasons. Indoor conditions sometimes provide shelter, moisture and access to prey. Small openings around the foundation, doors, windows and utility lines can provide entry routes.
1. Moisture and Humidity
Damp environments can make basements, bathrooms and crawl spaces attractive to certain centipedes. Leaking pipes, condensation, poor ventilation and water entering through foundation gaps may contribute to these conditions.
Check for persistent dampness, water stains, condensation and plumbing leaks. Fixing the source of moisture is generally more useful than simply removing the centipede you see.
2. Availability of Prey
Centipedes hunt other small arthropods. If insects or spiders are readily available indoors, the area may provide a useful food source. A centipede sighting does not prove that another pest is present in large numbers. However, repeated sightings can be a reason to check for other insects and investigate why they are appearing.
For comparison, you can read our guide to identifying common spiders to learn about another group of arthropods that may be found around homes.
3. Small Entry Points
Centipedes may pass through gaps around exterior doors, damaged weatherstripping, foundation cracks and openings where pipes or cables enter the building.
Even small openings can allow certain arthropods to enter. Inspect the lower edges of doors, basement windows, vents and utility penetrations. Sealing suitable gaps can reduce access, although the correct repair depends on the location and size of the opening.
4. Outdoor Shelter Close to the Foundation
Leaves, damp mulch, stones, wood and other debris can provide sheltered habitats near a building. These materials are not automatically a problem, but placing them directly against the foundation may make it easier for small arthropods to approach entry points.
Keep the immediate perimeter reasonably clear and avoid allowing moisture to collect against the building.
5. Seasonal and Weather Changes
Centipede activity varies by species and local conditions. Changes in temperature, rainfall and moisture may influence where they shelter or move. In Ontario, homeowners may notice different types of arthropod activity throughout the year. However, there is no single season in which every centipede species behaves the same way.
If sightings increase after heavy rain or during a period of damp weather, check for water entry and other environmental changes instead of assuming the weather alone explains the problem.
Are Centipedes Dangerous?
Most centipedes encountered in homes are not aggressive towards people. They generally attempt to hide or escape rather than approach humans. Centipedes can bite if handled, trapped against the skin or otherwise threatened. Their venom helps them subdue prey, and a bite may cause pain, redness, swelling or other local reactions. The effects vary depending on the species and the individual.
Children and pets may be more likely to investigate or touch a moving animal, so avoid encouraging contact.
What Should You Do If a Centipede Bites You?
If a bite occurs:
Move away from the centipede and avoid handling it again.
Wash the affected area gently with soap and water.
Apply a cold compress wrapped in a cloth to help relieve discomfort.
Monitor the area for worsening symptoms.
Seek medical advice if pain or swelling is significant, symptoms worsen or you are uncertain about the animal involved.
Seek urgent medical attention for breathing difficulty, facial or throat swelling, faintness or other signs of a severe allergic reaction.
Do not attempt to identify an unfamiliar species by picking it up. A clear photograph taken from a safe distance may be sufficient for identification.
Are Centipedes Poisonous?
Centipedes are venomous rather than poisonous in the usual sense. They deliver venom through specialised appendages when capturing prey or defending themselves.
The word venomous describes an animal that injects toxins, while poisonous generally refers to an animal or substance that causes harm when touched or ingested. This distinction helps explain how centipedes interact with their environment.
For most household encounters, avoiding direct contact is a sensible precaution.
Do Centipedes Damage Your Home?
Centipedes do not chew wood, damage structural materials or feed on stored food in the way some other pests do. They are predators, not household material feeders.
Their presence can still be inconvenient. Seeing them indoors may cause concern, particularly when they appear repeatedly in bathrooms, basements or bedrooms.
The main issue is often the environment that allows them to survive indoors. Moisture, accessible hiding places and other arthropods may be contributing factors.
If you notice several centipedes over a short period, look beyond the individual sightings. Check whether there are recurring damp areas, openings around the foundation or signs of other pests.
How to Prevent Centipedes in Your Home
Prevention focuses on making the building less suitable for centipedes and reducing access to indoor shelter and prey. You do not need to use pesticides as the first response to every sighting.
1. Reduce Excess Moisture
Repair leaking taps and pipes, address water entering through the foundation and improve ventilation in damp rooms where possible. Use a dehumidifier when appropriate for persistently humid areas. Keep an eye on condensation around windows and plumbing fixtures.
If moisture continues despite basic repairs, investigate the underlying cause. Water entering through a foundation wall or recurring plumbing leak may require a more specific solution.
2. Seal Gaps and Cracks
Inspect the exterior and interior of your home for openings that could allow arthropods to enter.
Pay particular attention to:
Gaps around pipes and utility lines
Cracks in suitable foundation joints
Openings around basement windows
Damaged door seals and weatherstripping
Gaps around exterior vents where appropriate screening is missing or damaged
Use a repair material suited to the location. Do not block ventilation openings or drainage features that must remain functional.
3. Keep the Foundation Perimeter Tidy
Remove unnecessary piles of leaves, damp cardboard, old wood and other debris near the foundation. Keep stored materials organised and avoid creating undisturbed, damp spaces directly against the house.
Where possible, maintain a clear inspection area around the building so gaps, water entry and pest activity are easier to notice.
4. Control Other Indoor Pests
Because centipedes are predators, reducing the availability of their prey may make indoor areas less attractive.
Store food appropriately, clean crumbs and spills, manage rubbish and investigate recurring insect sightings. Different pests require different approaches, so avoid applying a single treatment method to every insect problem.
Our guide to common household pest problems can help you explore other types of unwanted pests and understand why correct identification matters.
5. Reduce Clutter in Damp Areas
Boxes, stored fabrics and unused items can create undisturbed hiding places. Keep basement and utility areas organised, and avoid storing cardboard directly on damp floors.
Use suitable shelving and inspect storage areas periodically. Good organisation also makes it easier to notice moisture, small insects and potential entry points.
6. Improve Inspection and Cleaning Habits
Vacuum corners, floor edges and accessible spaces where dust and small arthropods collect. Pay particular attention to areas around baseboards, utility rooms and storage spaces.
Cleaning alone will not resolve every centipede problem, especially if moisture or entry points remain. Combine routine cleaning with repairs and environmental improvements for a more effective approach.
How to Get Rid of Centipedes Indoors
If you find a single centipede, you can usually remove it without a complicated treatment.
Use a container and stiff paper if you can do so safely without touching the animal, or use a vacuum to remove it. Avoid handling it directly. Clean the area afterwards if needed and check for nearby gaps or moisture.
For recurring sightings, use a more systematic approach.
Identify the Pattern
Record where and when centipedes appear. Are they consistently found in one damp basement corner, near a bathroom, or across several rooms? The location can help narrow down the conditions worth investigating. A single sighting in a basement has a different significance from repeated sightings across multiple levels of a home.
Inspect Likely Hiding Places
Look for dampness, plumbing leaks, cracks and other arthropods in the affected area. Check accessible spaces without disturbing electrical equipment, unsafe crawl spaces or other hazardous areas. If you cannot safely access a suspected hiding place, leave the inspection to a qualified professional.
Avoid Unnecessary Pesticide Use
Spraying every room after seeing one centipede is unlikely to address the underlying cause. Pesticides should only be used when appropriate for the identified pest, the location and the product label.
Never mix pesticides or use products in ways not permitted by their labels. Keep people and pets away from treated areas as directed, and do not apply outdoor products indoors unless the label specifically permits it.
When identification is uncertain or sightings continue, an inspection may be more useful than repeated, broad pesticide applications.
When Should You Call a Pest Control Professional?
Professional help may be appropriate when centipedes appear frequently, the source is unclear or preventive measures have not reduced sightings.
A useful inspection considers the pattern of activity rather than focusing only on the animal that was found. Depending on the circumstances, this may include examining moisture conditions, possible entry points, accessible hiding places and evidence of other arthropods.
Consider seeking help if:
Centipedes appear repeatedly in several rooms.
Sightings continue after practical moisture and sealing improvements.
You suspect a larger underlying pest issue.
You cannot identify the animal confidently.
The likely source is in a difficult or unsafe-to-access area.
A professional assessment can help determine whether centipedes are the main issue or whether another environmental or pest condition needs attention.
If you need assistance evaluating a recurring pest problem, explore professional pest control services to learn more about the options available from Acme Pest Solutions.
The appropriate response depends on the species, the building and the conditions supporting the activity. Not every sighting requires chemical treatment, and no single method is suitable for every property.
Centipedes vs. Millipedes: What Is the Difference?
Centipedes and millipedes are often confused because both have elongated bodies and many legs. However, their feeding habits, movement and typical appearance differ.
These are general distinctions, and individual species vary. If an animal is unfamiliar, avoid touching it and use a photograph for identification. Understanding the difference helps you select a suitable response instead of treating every many-legged arthropod as the same pest.
How do centipedes reproduce? What are the different stages of their life cycle?
Centipedes are fascinating creatures that can reproduce both sexually and asexually. In sexual reproduction, the female lays eggs which hatch into juvenile centipedes. During mating, the male will transfer sperm to the female’s genital opening, where it will fertilize the eggs inside her body. The number of offspring varies depending on each species, but some can lay up to 200 eggs simultaneously.
The life cycle of centipedes consists of four stages: egg, larva, nymph and adult. The egg stage lasts between two weeks to a month before hatching into larvae. Larvae undergo several moults as they grow in size and develop new segments and legs. Once they reach their final moult as a larva, they enter into the nymph stage, where they resemble miniature adults but without fully developed reproductive organs.
Finally, after further growth and development, centipedes enter adulthood, capable of reproducing themselves. Depending on their species and environmental factors such as temperature and humidity levels in their habitat, they may live anywhere from one to six years or more before dying naturally. These unique arthropods have fascinating life cycles that vary in length depending on different factors such as nutrition availability for growth during infancy, among others which makes them worthy subjects of study for biology enthusiasts worldwide!
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Conclusion
Why am I finding centipedes in my bathroom?
Bathrooms can provide moisture, shelter and access to small arthropods. Check for leaking plumbing, condensation, gaps around pipes and openings near the floor. If sightings continue, inspect nearby rooms and accessible areas rather than assuming the bathroom is the only source.
Do centipedes mean my house is dirty?
No. Centipedes can enter clean homes through small gaps or because local conditions provide moisture and prey. Clutter and neglected cleaning can create hiding places, but a sighting does not prove that a home is dirty.
Do centipedes lay eggs indoors?
Centipede reproduction varies by species. Some lay eggs in sheltered environments, and suitable soil or protected spaces may support reproduction. Finding one centipede indoors does not establish that eggs have been laid in the building.
Should I kill every centipede I see?
You do not need to eliminate every centipede from your property. They are predators that contribute to controlling small arthropods outdoors. If one enters your living space, remove it safely and address any conditions that may be encouraging repeated entry.
Can centipedes climb walls?
Some centipedes, including house centipedes, can move along walls and other surfaces. Their ability to navigate indoor surfaces depends on the species and the conditions. Seeing one on a wall does not necessarily indicate a nest in that location.
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What attracts centipedes the most?
Centipedes are often associated with suitable shelter, moisture and access to prey. The importance of each factor depends on the species and the environment. Look for the conditions present in the area where sightings occur rather than relying on one explanation.
Are centipedes active at night?
Many centipedes are more active when conditions are dark and sheltered, although activity patterns differ among species. Indoor lighting and human activity may influence when people notice them, so daytime sightings are also possible.
Will a dehumidifier get rid of centipedes?
A dehumidifier may help if excess humidity is contributing to suitable indoor conditions. However, it will not seal entry points or remove every source of prey. Combine moisture management with inspection, repairs and appropriate pest prevention.
Can centipedes come up through drains?
A centipede found near a drain does not necessarily mean it came through the plumbing. It may have entered through a nearby gap or moved into the room from another hiding place. Check the surrounding area and plumbing openings before drawing conclusions.
Conclusion
Centipedes are predators that usually prefer to remain hidden. Although their many legs and quick movements can be alarming, most indoor sightings can be approached calmly.
Start by identifying the animal, removing it without direct contact and checking the surrounding area for moisture, gaps and other arthropods. Seal suitable entry points, keep the foundation perimeter tidy and address recurring dampness. These practical steps can reduce the conditions that encourage centipedes to enter.
If sightings continue despite reasonable preventive measures, professional assessment can help identify what is supporting the activity and determine an appropriate next step.
Acme Pest Solutions provides residential and commercial pest control services. If you need help understanding a recurring pest concern, contact the team to discuss your situation and the options that may be suitable for your property.