House Centipede

The house centipede is a common arthropod in Montreal basements. Although frightening in appearance, it is harmless and feeds on other harmful insects.

Identification sheet

Appearance

Elongated yellow-grey body with 15 pairs of long legs. Moves very quickly on walls and ceilings.

Size

25 to 35 mm

Color

Yellow-grey with dark bands

Habitat

Basements, bathrooms, damp dark places. Active at night, hides during the day in cracks.

Lifespan

3 to 7 years

Danger level

Very low

Health risks

House centipedes are virtually harmless to humans. Their bite is rare and comparable to a mosquito bite. Their large presence indicates a moisture or other insect problem.

Signs of infestation

Centipedes visible on walls or ceilings at night
Presence in bathroom or basement
Characteristic rapid movement
Increased presence of other insects (their prey)
Excessive moisture in certain rooms
Cracks in foundations

Prevention tips

Reduce humidity with a dehumidifier
Fix water leaks
Seal cracks in foundations
Improve basement ventilation
Eliminate other insects that attract them
Declutter dark and damp areas

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