1 to 2 inch worm-like crawler
Common species are 1 to 2 inches long with bodies that look like slow-moving worms with many short legs. Pencil-lead thickness, rounded rather than flat in cross-section.
Millipedes Around Your Home
Millipedes are slow cylindrical many-legged arthropods that live in damp soil and leaf litter, feeding on decaying plant material. They have 2 pairs of short legs per segment (which separates them from centipedes), curl into a defensive coil when disturbed, and migrate in mass during certain weather events. Most are harmless, but a single migration can deposit hundreds of curled bodies in a basement or garage overnight.
Why They End Up Indoors
Millipedes do not breed indoors and rarely survive long inside (interior air is too dry). They migrate when outdoor habitat becomes uninhabitable: heavy rain that floods burrows or sudden drought that dries the leaf litter. Your home is not the target. It is a barrier they encounter while moving across the landscape.
Three property conditions concentrate millipede pressure within a few feet of the foundation.
What millipedes are actually after:
- Damp organic matter: deep mulch, leaf piles, woodpiles, decomposing yard debris.
- Foundation moisture: poor grading, downspout overflow, AC condensate puddles.
- Easy entry: worn garage door seals, basement window wells, foundation cracks.
Millipedes by the Numbers
Common North American species reach 1 to 2 inches with 30 to 90 body segments at maturity, each carrying 2 pairs of legs (60 to 180 legs total). A single wet-weather migration can move hundreds to thousands of individuals across a yard within 24 to 48 hours. Lifespan runs 1 to 3 years for most species, longer for larger ones.
- 1 to 2 in Adult body length
- 2 Leg pairs per segment
- 60 to 180 Total legs (typical)
Three Tells It Is a Millipede
Three checks separate millipedes from centipedes and other elongated invertebrates.
Two leg pairs per segment
Two pairs of short legs per segment, tucked under a cylindrical body. Legs ripple as the millipede moves. Centipedes have 1 pair per segment splayed sideways.
Dark brown to black, coils when disturbed
Most North American species are dark brown to nearly black, some with reddish or banded markings. When disturbed, millipedes coil into a tight defensive spiral, which is the strongest visual ID.
Signs You Have a Millipede Pressure Issue
Millipede issues are visual, sudden, and tied to weather. The most common pattern is a wet-weather mass appearance within 24 to 48 hours of heavy rain, with little warning beforehand. Dozens to hundreds of curled bodies along basement walls and garage perimeters is the headline experience.
Drought events produce the second pattern. When mulch and leaf litter dry out faster than millipedes can survive, populations migrate toward moisture. Irrigated landscape beds, AC condensate puddles, and any consistently damp microclimate near the foundation become indoor magnets. Drought migrations often last longer than rain migrations.
Defensive secretion stains and a cherry-almond or musty smell round out the experience. The chemicals released when millipedes are crushed or threatened can leave permanent yellowish-brown stains on cardboard, untreated wood, and painted concrete. Skin contact may cause mild irritation, so gloves during cleanup are sensible.
How a Millipede Migration Plays Out
Outdoor buildup Mulch beds, leaf litter, and damp soil host large millipede populations through summer; rarely seen by homeowners
Trigger event Heavy rain saturates soil, or a sudden drought dries it out; either condition forces millipedes to surface and move
Mass indoor entry Hundreds slip under garage doors, through foundation cracks, and along basement walls; most die indoors within days
Why Millipedes Are More Nuisance Than Threat
Millipedes are essentially harmless to people, pets, and structures. They do not bite, do not sting, do not spread disease, and do not damage wood or insulation. Outdoors they are decomposers that consume decaying leaves, plant matter, and fungi, contributing to soil health. The issue homeowners encounter is not what millipedes do but how many of them sometimes show up at once. A single migration event can deposit hundreds of curled-up dead millipedes in a basement or along a garage wall in 24 hours. Cleanup is the burden, not damage.
The defensive secretion millipedes release when threatened can stain finished surfaces and stored items, and a small percentage of people experience mild skin irritation from contact. The chemicals (a mixture that can include benzoquinones, hydrogen cyanide in trace amounts, or alkaloids depending on species) are not dangerous in typical exposures but warrant washing skin after handling and avoiding contact with eyes. Pets that mouth a coiled millipede may drool or paw at the mouth briefly; the irritation resolves on its own.
Effective millipede management runs through the exterior. Reduce mulch depth and pull mulch back from the foundation. Remove leaf litter, woodpiles, and damp debris within several feet of the home. Improve foundation drainage and grading. Apply pro residual treatment around the perimeter and to garage thresholds and basement walk-out doors. Seal foundation cracks and door sweeps. Indoor sweeping or vacuuming after a migration event handles the cleanup; treating the source reduces the next event.
Millipede Anatomy at a Glance
Six features confirm a millipede and explain why these animals migrate in mass during certain weather.
-
Two pairs of legs per segment
The defining trait. Each apparent body segment is two fused segments, each with its own pair of legs. The legs ripple in waves, the most distinctive movement of any small arthropod.
-
Cylindrical worm-like body
Round in cross-section, not flat. Lets millipedes burrow through soil and leaf litter. The cylindrical shape also lets them coil tightly into the defensive spiral when threatened.
-
Short antennae
Two short stubby antennae detect moisture, food, and chemical cues. Compared with the long sweeping antennae of centipedes, millipede antennae look almost vestigial at a glance.
-
Many tiny legs
Common species have 60 to 180 legs total, far more than centipedes despite the misleading common names. Legs are very short and tucked beneath the body, contributing to the slow methodical pace.
-
Defensive coil
When threatened, millipedes curl into a tight flat spiral with the head tucked inside and hard plates facing outward. Many indoor dead millipedes are still in this posture: the species signature.
-
Head with simple eyes
Simple eye spots detect light and dark rather than form images, plus small chewing mouthparts for decaying plant material. Relies more on chemoreception and touch than vision for navigation.
What Migration Pattern Matches Your Yard?
Match what you are seeing at the home to the most likely millipede situation and treatment direction.
How Urgent Is This Really?
Millipedes are outdoor decomposers that wander indoors during weather shifts, especially late summer through fall. They do not damage homes or breed indoors, but mass invasions can be unsettling.
- 0 to 2 weeksMonitor
A few millipedes in a basement, garage, or low-floor room after heavy rain. Outdoor population established in mulch, leaf litter, or compost. They curl up and die without moisture.
- Sweep or vacuum indoor millipedes (they are harmless, just unsettling)
- Inspect mulch beds, leaf piles, and compost within 10 feet of the foundation
- Check basement window wells, doorway gaps, and weep holes for entry points
- 2 weeks to 1 monthAct soon
Multiple millipedes per day indoors, especially after storms or temperature swings. Outdoor population is large enough that even small entry gaps let dozens in. Late-summer mass migrations can bring 50+ at a time.
- Reduce moisture at the foundation: pull mulch back 12 inches, fix drainage that pools near walls
- Seal entry points: weatherstripping, door sweeps, weep hole covers, basement window seals
- Apply a perimeter residual treatment focused on shaded, mulched, or damp foundation zones
- 1 to 3 months (late summer to fall)Urgent
Mass invasions during weather shifts, hundreds of millipedes outside the foundation, or persistent indoor wandering despite cleanup. The migration is driven by environmental triggers (drought, flooding, cold snap), not infestation.
- Schedule a perimeter barrier treatment; holds 3 to 6 weeks against migrating millipedes
- Continue moisture control; keeping the foundation dry is the most reliable long-term strategy
- Address landscape: replace heavy organic mulch near the foundation with stone or gravel
- Recurring annualYearly program
Mass migrations every late summer or fall, especially on properties with heavy mulch, dense ground cover, or wooded perimeters. One-time treatments do not hold. This is a yearly perimeter program timed to seasonal weather shifts.
- Schedule perimeter treatments timed to typical fall migration (varies by region)
- Reduce permanent harborage: replace heavy mulch, raise woodpiles, thin dense ground cover
- Plan a second treatment if a wet fall extends migration activity into October or November
Millipede invasions are weather events, not pest events. Treatment that targets the foundation perimeter and outdoor harborage zones almost always solves the problem. Spraying indoors has minimal effect on the next migration.
Pest Control Pros serving your city, and nearby areas
Local pros time perimeter treatments to the wet- and dry-weather windows that drive your area's millipede migrations and address the harborage that surface spray alone cannot reach.
Available 24/7
(888) 495-1510 What Concentrates Millipedes Near Homes
Millipedes do not pick basements at random. They follow signals: deep mulch maintained year after year against the foundation, downspouts that discharge against the wall, ground covers like ivy or pachysandra that lock moisture into the soil. A single wet-weather migration can move hundreds to thousands of individuals across a yard within 24 to 48 hours, and any threshold gap larger than 1/16 inch lets the front edge of the wave inside.
Common North American millipede species reach 1 to 2 inches with 30 to 90 body segments and rolled-spiral defensive posture when disturbed. Greenhouse millipedes (Oxidus gracilis) dominate suburban Midwest and Northeast yards. Larger Narceus species (American giant millipede) appear in the Southeast and Appalachian regions. Garden millipedes show up in damp planters and compost. All share the same moisture-driven behavior: outdoor populations migrate indoors only when their soil habitat dries out or floods.
Most affected homes have two or three of these conditions running at once, and moisture-fix beats spray every time. Start with the highest-leverage source: pull mulch back 12 inches from the foundation, redirect downspouts at least 4 feet from the wall, and clear leaf piles from landscape beds. Then seal threshold gaps and basement weep holes. Even partial wins help: regrading one downspout outlet and removing 2 inches of mulch from the foundation often cuts indoor millipede sightings by 70 to 90 percent within a single wet-weather event.
Where Millipedes Concentrate
Mulch beds at the foundation
The largest source population for most home migrations. Reducing depth and pulling mulch back 12 to 18 inches from exterior walls is the single biggest exterior change.
Leaf piles and yard debris
Accumulated leaves, grass clippings, and yard waste retain moisture and decompose into ideal millipede food. Clear within several feet of the home.
Garage door thresholds
The bottom-of-door gap is the single most common indoor entry point during migrations. Worn door seals invite hundreds of individuals during a single event.
Basement window wells
Window wells collect leaf litter and water and act as funnels for migrating millipedes. Covers and clean wells reduce both the harborage and the entry path.
Foundation drainage zones
Areas where downspouts dump water near the foundation, where exterior grade is flat or sloped toward the house, or where AC condensate puddles. Fix these to dry the source.
Stored items in basements and garages
Cardboard boxes on the floor near foundation walls catch defensive secretions and stain easily. Move valuables off the floor and into sealed bins.
How Millipede Populations Develop
Millipedes are slow-developing decomposers that build up over years in undisturbed mulch and leaf-litter habitat.
-
Egg
Several weeks
Females deposit eggs in moist soil, leaf litter, or rotting wood. Eggs are sensitive to drying out and require sustained moisture to hatch.
-
Early instars and subadult
Months to years
Hatchlings have fewer body segments than adults and add segments across successive molts. Subadults feed actively on decaying plant material and drive most outdoor population bulk.
-
Adult
Lives 1 to 3 years
Adults reproduce annually under favorable conditions. Long lifespan and continued growth make millipede populations cumulative across seasons in undisturbed yards.
Generation time runs roughly 1 to 2 years in temperate climates. Populations build cumulatively over multiple seasons in undisturbed habitat, which is why mature suburban yards with long-established mulch beds produce migrations that newer construction does not.
What Actually Works on Millipedes
Honest read on common millipede tactics. The right plan addresses the outdoor source, not just the indoor symptom.
What can move the needle
Harborage and moisture reduction
-
Rake mulch back 12 to 18 inches off exterior walls; cap mulch depth at 2 inches - Remove leaf piles, woodpiles, and yard debris from within several feet of exterior walls
- Correct exterior slope and add downspout extensions so rainwater leaves the foundation
Targeted exterior treatment
- Pro residual perimeter treatment timed before predicted wet weather or known dry stretches
- Garage door thresholds and basement walk-out doors get focused attention
- Granular treatments in mulch beds where chemical perimeter spray is undesirable
Entry sealing
- Replace worn garage door bottom seals; inspect side weather stripping
- Caulk visible foundation cracks and seal around plumbing penetrations
- Install fresh weather seals on basement walk-out doors and address window well drainage
What rarely solves the issue
Indoor surface spray
- Kills millipedes that already entered but does not affect outdoor population
- The same migration recurs at the next wet-weather or drought event
- Wrong tool for what is fundamentally an exterior issue
Bug bombs in basements
- Foggers do not reach the outdoor harborage where the population lives
- Pesticide residue on stored items with no real progress on the source
- Almost never the right tool for migration events
Moth balls and naphthalene
- Folk remedy with no meaningful effect on millipede populations
- Naphthalene exposure is itself a health concern for indoor air
- Not recommended; the resources are better spent on exterior changes
How to Reduce Millipede Migrations
Six prevention steps sorted by effort. Outdoor work outperforms anything done indoors.
-
Pull back foundation mulch
Rake mulch back 12 to 18 inches from exterior walls and cap depth at 2 inches. The single biggest exterior change for migration pressure on most homes with established mulch beds.
-
Clear leaf piles and yard debris
Remove leaves, grass clippings, woodpiles, and stacked landscape stones from within several feet of exterior walls. Cuts both food (decaying plant matter) and harborage.
-
Replace garage door bottom seal
Worn garage door seals are the top entry route during migrations. A new seal can cut indoor garage millipede counts by 80 percent or more during the next 48-hour event.
-
Improve foundation drainage
Extend downspouts at least 6 feet from the foundation and correct exterior grade so water moves away. Drier soil supports fewer millipedes within a single season.
-
Pro perimeter treatment
Spring and fall residual perimeter treatment timed to your local migration patterns drops indoor entries dramatically during peak weeks. Granular formulations supplement liquid in mulch beds.
-
Move stored items off the floor
Move basement and garage stored items into sealed plastic bins on shelving rather than cardboard on the floor. Protects against defensive-secretion staining during migration events.
When Millipede Migrations Happen
Migrations are weather-driven rather than strictly seasonal, but certain seasons see more of the trigger conditions than others.
-
Spring
Wet springs produce the year's first major migration events as overwintering populations surface. Indoor entries spike during heavy rain weeks.
-
Summer
Drought migrations dominate hot dry weeks. Irrigated landscape beds become magnets for displaced millipedes. Activity continues as long as soil moisture is uneven.
-
Fall
Cool wet stretches produce another peak as populations move toward overwintering shelter. Garage and basement entries spike during active weeks.
-
Winter
Outdoor populations dormant in deep mulch and below the frost line. Indoor sightings drop sharply except in mild-climate regions where activity continues year-round.
What a Pro Millipede Visit Looks Like
Four steps from arrival to a control plan that focuses on the exterior source. Initial visit runs 45 to 60 minutes.
Outdoor-first, sealing second, indoor cleanup last. Real millipede control is exterior work. Pros build the plan around the yard and perimeter, not the basement floor.
Want a real diagnosis? (888) 495-1510
-
Yard and perimeter walk-through
Inspect mulch zones, leaf piles, woodpiles, downspouts, garage thresholds, and basement walk-out doors. Identify harborage zones and entry points specific to the property.
-
Exterior residual application
Apply residual product around the foundation, at door thresholds, garage perimeters, and into mulch zones during active migration windows. Granular formulations supplement liquid in beds.
-
Sealing and grading guidance
Identify garage door seals, foundation cracks, and grading or downspout fixes that will keep entry pressure low between treatments. Most yards need 2 to 3 specific fixes.
-
Migration-window scheduling
Set a quarterly or twice-yearly preventive schedule timed to the property's local wet- and dry-weather windows. Treatments timed before events outperform reactive work.
What Homeowners Say After Millipede Treatment
Real stories from households that addressed the outdoor source of their migrations and stopped the recurring indoor floods.
Rashad E.
Portland, OR
"No pressure, just options."
I appreciated being given eco-friendly options without being pushed. The technician explained tradeoffs honestly and let me decide based on my priorities. They were transparent about what each approach involves. The no-pressure approach and honest information helped me make a confident decision.
Rashad E.
Portland, OR
"No pressure, just options."
I appreciated being given eco-friendly options without being pushed. The technician explained tradeoffs honestly and let me decide based on my priorities. They were transparent about what each approach involves. The no-pressure approach and honest information helped me make a confident decision.
Yu E.
Durham, NC
"The inspection caught what we missed."
I didn't realize how much damage raccoons can cause once they get inside. The wildlife specialist explained what areas they inspect first and why raccoon issues are handled more carefully than regular pests. They showed me the damage and explained removal and exclusion strategies. Understanding the potential for damage made me glad I called professionals.
Ren P.
Dayton, OH
"The problem finally stayed gone."
Ants kept returning no matter what we did. The tech treated the trail areas and explained how to handle food storage and moisture so the ants don't keep coming back. It's been months and we haven't seen them again. I appreciated that it wasn't just a one-and-done spray.
Kayla Q.
Pittsburgh, PA
"Clear expectations and a real plan."
I was overwhelmed and didn't know what was realistic to fix quickly. The inspector explained what results to expect and how long it typically takes depending on the ant species. They treated the right places and gave simple prevention tips. Everything felt structured and easy to follow.
Malachi U.
Knoxville, TN
"They found the entry points fast."
Ants were showing up in the kitchen and we couldn't figure out where they were coming from. The tech tracked the activity and pointed out two entry points we never would've noticed. After treating and sealing those areas, the ants disappeared. It was quick and surprisingly thorough.
Arturo B.
Yonkers, NY
"No pressure, just helpful info."
I mainly wanted to understand what was happening before committing to anything. The inspector walked me through the likely cause and the differences between treatment approaches. They answered questions without rushing me. The plan we chose worked and the ants were gone within days.
Octavio Z.
Duluth, MN
"The tech helped me stop wasting time."
I kept trying different products and nothing was sticking. The tech explained why some solutions don't work for certain ant problems and focused the treatment where it would actually matter. They also gave prevention tips that were easy to implement. The difference was obvious within the first week.
Chauncey A.
Duluth, MN
"We finally understood what to do next."
We felt stuck because nothing we tried lasted. The tech explained how to find the source of the problem, treated both indoor and outdoor areas, and helped us build a prevention routine. It wasn't complicated. Just the right steps in the right order. We've had a huge improvement since.
Vihaan V.
Madison, WI
"They fixed what was actually causing it."
Ants kept showing up in the same spot. The pro explained that the visible ants weren't the real issue and focused the treatment on where they were coming from. They identified the entry path and treated it properly. The problem stopped and hasn't returned.
Allison A.
Des Moines, IA
"It felt like a real inspection, not a quick spray."
The tech spent time figuring out where the ants were entering instead of just spraying around. They walked me through the likely reasons and what to watch for over time. After treatment, ant activity dropped fast and stayed low. The detailed approach gave me confidence.
Stephen N.
Sacramento, CA
"Small changes made a big difference."
We didn't realize how much our routine was attracting ants. The inspector explained simple prevention steps and treated the areas where activity was highest. Once those changes were in place, we stopped seeing ants inside. It was a practical approach that actually worked.
Daquan V.
Tampa, FL
"The explanation alone was worth it."
I'd been doing random treatments without understanding what I was dealing with. The tech explained how ants behave and why certain approaches work better. They treated strategically instead of just spraying. It made the whole thing feel manageable.
Deepak V.
San Antonio, TX
"We stopped chasing the problem and solved it."
We kept wiping down counters and the ants would be back the next day. The pro identified the entry areas and explained the treatment plan clearly. Once they treated and targeted the colony, the ants disappeared quickly. It felt like we finally got ahead of it.
Mireya Z.
Riverside, CA
"They didn't oversell. Just solved it."
The tech explained what treatment was necessary and what wasn't. They focused on the entry points and corrected the conditions that were attracting ants. The work felt honest and effective. I liked having clear expectations and seeing results quickly.
Wei D.
Lexington, KY
"It wasn't just 'spray and go.'"
I appreciated the step-by-step explanation and the focus on prevention. The inspector treated the areas where ants were getting in and helped me understand what to change at home. The ants stopped showing up and it's been consistent. The approach felt thoughtful and sustainable.
Shu W.
Orlando, FL
"It finally made sense why they kept coming back."
I had ants showing up every few months and never understood why. The tech explained how outdoor nests and weather changes affect indoor activity. They treated the perimeter and entry points instead of just the inside. Since then, we haven't had recurring issues.
Teresa I.
Mesa, AZ
"Targeted instead of overdone."
I was worried about over-treating the house. The pro focused on specific problem areas and explained why blanket spraying wasn't necessary. The ants stopped appearing, and we didn't feel like chemicals were used unnecessarily. That balance mattered to us.
Latonya X.
Mesa, AZ
"Clear answers without jargon."
The tech explained everything in plain language and answered questions without rushing. They identified the type of ant we had and adjusted the treatment accordingly. Knowing why the approach worked gave me confidence it would last.
Humberto T.
Eugene, OR
"They focused on prevention, not just treatment."
I liked that the tech talked through how to keep ants from returning after the treatment. They addressed moisture issues and entry points around the home. The treatment worked, and the prevention tips helped us stay ahead of future problems.
Jerrell N.
Arlington, VA
"No guessing, just a plan."
I was tired of guessing what would work. The inspector explained the cause of the issue and outlined a clear plan of action. After treatment, the ants disappeared and we haven't had to revisit the problem. It felt efficient and well thought out.
Marion K.
Boulder, CO
"They explained what to expect upfront."
The tech set expectations about timing and results before starting. They explained that some activity might happen initially and why. Everything played out exactly as described, and the ants were gone shortly after. That transparency made a big difference.
Bridget E.
Sacramento, CA
"Helpful without being overwhelming."
I didn't realize there were different types of ants or that it mattered. The inspector walked me through what they were seeing and explained how ant behavior affects treatment. It made it easier to ask the right questions and understand the solution.
Junho L.
Naperville, IL
"Saved me a lot of guessing."
I was close to trying random sprays for the ants. Talking with the tech helped me understand what was realistic to address and what usually doesn't work. The targeted treatment solved the issue quickly and saved time and frustration.
Willis Y.
Baton Rouge, LA
"It felt tailored to our home."
The tech didn't just apply a standard treatment. He looked at where we were seeing activity and adjusted the approach to our layout and yard. The ants stopped showing up and we understood how to keep it that way.
Thelma S.
Madison, WI
"Straightforward and effective."
I appreciated how straightforward everything was. The pro explained the issue, treated the problem areas, and gave us a few simple steps to prevent future issues. The ants were gone and it didn't feel complicated.
Angelina B.
Austin, TX
"They explained how the weather played a role."
I didn't realize seasonal changes could affect ant activity so much. The tech explained how heat and rain push ants indoors and what to do about it. They treated the problem areas and gave tips to prevent future issues. The explanation helped everything click.
Kirk Q.
Denver, CO
"It wasn't as complicated as I expected."
I assumed pest control would be disruptive or complicated. The technician explained the steps clearly and focused on targeted treatment. The ants stopped appearing quickly and the process was smoother than expected.
Cody L.
Denver, CO
"They helped me understand the bigger picture."
Instead of just treating the ants I saw, the tech explained what was happening around the house that made it attractive to pests. Once those factors were addressed, the problem resolved quickly. It felt educational as well as effective.
Marquis K.
San Mateo, CA
"Clear communication from start to finish."
I appreciated how clearly everything was explained before treatment began. The inspector walked through the process and answered all my questions. The ants were gone shortly after and we felt confident about prevention going forward.
Virginia T.
San Mateo, CA
"They addressed what we were missing."
We kept focusing on cleaning, but the tech showed us where ants were actually entering. Once those points were treated and sealed, the issue resolved. It was reassuring to finally understand the root cause.
June J.
Omaha, NE
"A methodical approach that worked."
The pro explained how they identify ant trails and colonies before treating. They took a methodical approach instead of rushing through. The ants stopped appearing and the fix has held up well.
Caitlin K.
Phoenix, AZ
"They understood desert pest behavior."
Living in Phoenix, pests behave differently than other places. The tech explained how heat drives ants indoors and what treatments work best here. The solution was effective and tailored to our environment.
Olive S.
Sacramento, CA
"They took the time to do it right."
I appreciated that the tech didn't rush. He inspected the problem areas carefully and explained what they were seeing. The treatment worked quickly and the ants haven't returned.
Arianna D.
Baton Rouge, LA
"They understood the local pest issues."
The tech explained how the humidity here contributes to ant problems and why certain treatments work better in this climate. They focused on outdoor entry points and moisture-prone areas. The ants cleared up quickly and haven't come back.
Kiyana N.
New Orleans, LA
"Finally something that lasted."
We'd dealt with recurring ants for years. The pro explained why flooding and moisture play such a big role here and adjusted the treatment accordingly. It's been months without seeing ants, which is a big win for us.
Brett R.
Phoenix, AZ
"They knew exactly what works in Arizona."
The tech explained how desert conditions affect ant behavior and which treatments are most effective here. They targeted the right areas and avoided unnecessary spraying. The ants disappeared quickly.
Albert O.
Baltimore, MD
"Clear, calm, and professional."
I appreciated how calmly everything was explained. The inspector identified the ant problem, explained the treatment, and answered my questions without rushing. The solution worked and gave me peace of mind.
Rohit Y.
Orlando, FL
"They handled it efficiently."
The tech inspected the problem areas, explained the plan, and got to work quickly. The ants were gone within days and the process felt efficient without being rushed.
Carolyn H.
Omaha, NE
"Simple explanations, solid results."
I liked how simply everything was explained. The pro didn't overcomplicate things and focused on what mattered. The ants stopped appearing and we haven't needed follow-up treatments.
Edith Z.
Newark, NJ
"They showed me what to watch for."
Beyond treating the ants, the tech explained what signs to watch for if activity starts again. That knowledge made me feel more in control. So far, everything has stayed clear.
Common Questions About Millipedes
Direct answers to the questions homeowners ask most about millipede migrations and indoor cleanup.
-
Are millipedes dangerous to people or pets? Toggle answer for: Are millipedes dangerous to people or pets?
Millipedes are essentially harmless to people and pets. They do not bite, do not sting, and do not transmit disease. The one practical concern is the defensive secretion that some species release when threatened, which may cause mild skin irritation if handled with bare hands and can stain clothing or porous surfaces. The chemicals can include benzoquinones and other compounds that produce a faint cherry-almond or musty smell and a yellowish-brown stain. Washing skin with soap and water after contact and avoiding contact with eyes is sufficient for typical encounters. Pets that mouth a coiled millipede may drool or paw at their mouth briefly, but the irritation resolves on its own without veterinary intervention in nearly all cases. Tropical species, especially some larger Asian and South American varieties, can release more potent chemicals; these are not species typical homeowners in temperate North America will encounter. The honest framing is that millipedes are a nuisance and aesthetic concern, not a health threat.
-
Why are hundreds suddenly in my basement? Toggle answer for: Why are hundreds suddenly in my basement?
Mass appearances of millipedes in basements and garages are migration events triggered by weather. The most common pattern is heavy rain saturating soil and flooding the underground burrows where the population lives, forcing them to the surface in search of drier conditions. The opposite trigger also produces migrations: extended drought drying out mulch and leaf litter forces millipedes to migrate toward any consistently moist microclimate. In both cases, the home is encountered as a barrier during migration rather than as a destination. Basements and garages with grade-level access are common catchments. Most millipedes that enter die within hours to days because indoor air is too dry for them to survive. The event is dramatic but typically self-limiting once outdoor conditions stabilize. Reducing mulch volume, improving foundation drainage, and replacing worn garage door seals dramatically reduces the indoor catchment during the next event. Homes that experience repeated migrations year after year nearly always have addressable harborage and entry conditions.
-
Will millipedes damage my house or plants? Toggle answer for: Will millipedes damage my house or plants?
No structural damage to homes. Millipedes do not chew wood, drywall, insulation, or wiring. Outdoors they feed on decaying plant material rather than living plants, so they are not significant garden pests in the way slugs, cutworms, or some beetle larvae are. The exception is occasional damage to seedlings or soft-fruited crops in extremely high-density populations or unusual conditions, but this is uncommon and rarely the issue homeowners describe. The actual cost millipedes impose on homes is the cleanup burden after migration events and the potential for defensive secretion staining on cardboard boxes, painted concrete, or other porous surfaces in the affected areas. Stained items in basements and garages are the most common form of property impact. Moving stored items into sealed plastic bins on shelving rather than cardboard on the floor protects against this. Painted concrete stains can sometimes be cleaned with mild soap and water; porous surfaces often retain the discoloration permanently.
-
What is the difference between centipedes and millipedes? Toggle answer for: What is the difference between centipedes and millipedes?
Three diagnostic differences. First, leg arrangement: millipedes have two pairs of legs per body segment, tucked under a cylindrical body, while centipedes have one pair per segment, splayed out from a flat body. Second, body shape: millipedes look worm-like and rounded, centipedes look ribbon-like and flattened. Third, behavior: millipedes are slow scavengers that curl into a tight defensive coil when disturbed, while centipedes are fast predators that flee or attack when disturbed. Diet and habitat differ accordingly. Millipedes feed on decaying plant material in damp soil and leaf litter; centipedes hunt other insects in damp environments that contain prey. Both prefer moist conditions, so they sometimes share habitat, but they are unrelated in any meaningful way at the household pest level. Treatment approaches differ too: millipede control runs through outdoor harborage and migration prevention, while centipede control runs through prey insect populations and indoor humidity. Confusing the two and applying the wrong approach is one of the most common DIY missteps for occasional invader pressure.
-
Do millipedes reproduce inside my house? Toggle answer for: Do millipedes reproduce inside my house?
No. Millipedes require sustained soil moisture for egg-laying and early development that indoor environments cannot provide. The vast majority of millipedes found indoors die within hours to days because indoor air is too dry for them to survive long-term. A homeowner who finds dozens of curled millipedes along a basement wall is looking at the end of a migration, not at an indoor population. The practical implication is that millipede issues are exterior issues with temporary indoor symptoms, similar to earwig issues. Treating only the indoor space (basement spray, garage fogging, baseboard treatment) tends to fail because the source is outside. Treating the outdoor source (mulch reduction, perimeter residual, garage door seal replacement, foundation drainage) consistently resolves the recurring migrations within a single treatment cycle. Exceptions exist in homes with chronic crawl space dirt floors and standing soil moisture, but these are unusual and usually warrant separate structural investigation beyond pest control.
-
How do I clean up after a migration event? Toggle answer for: How do I clean up after a migration event?
Wear gloves to avoid contact with defensive secretions and use a vacuum or stiff-bristle broom for collection. Most of the millipedes in a typical post-migration cleanup are dead or nearly so, which makes the work easier than it looks. Vacuum bags or canisters should be emptied promptly into a sealed outdoor trash bag because some live individuals may persist for a day or two. For staining on painted concrete or other non-porous surfaces, mild soap and water cleans most stains; commercial concrete cleaners or oxygen-based cleaners can address persistent discoloration. Porous surfaces (cardboard boxes, untreated wood, certain stored fabrics) often retain stains permanently and may need to be discarded. Address any stored items immediately rather than letting secretions sit on the surface. After cleanup, inspect entry points (garage door seals, basement walk-out door thresholds, foundation cracks, window wells) and address what you find. The cleanup handles one event; the entry point work reduces the next one.
-
Can professional treatment stop the migrations? Toggle answer for: Can professional treatment stop the migrations?
Professional treatment can dramatically reduce indoor migration entries when applied as part of a layered plan, but the honest framing is reduction rather than elimination for properties with significant outdoor populations. A typical pro program combines residual perimeter treatment timed before predicted wet- or dry-weather windows, granular treatment in mulch zones where appropriate, garage door threshold treatment, and recommendations on harborage reduction (mulch volume, leaf litter, drainage) and entry sealing (garage door seal, foundation cracks, window wells) for the homeowner to implement. Spring and fall preventive visits typically replace the homeowner's reactive cleanup with predictable low-pressure migration windows. Properties with deep long-established mulch beds, dense ornamental plantings against the foundation, or chronic exterior drainage issues may need the structural work addressed before treatment alone can fully control the issue. Homeowners who pair pro treatment with the recommended exterior changes report dramatic reductions in indoor mass appearances, often within a single treatment cycle.
Pest Control Pros serving your city, and nearby areas
Reduce the harborage, seal the entry points, and time the treatments to your weather. Local pros build a millipede plan that anticipates the next migration rather than reacting to the last one.
Available 24/7
(888) 495-1510