Friendly illustration of house centipede

House Centipede

Scutigera coleoptrata · Spiders & Centipedes

The house centipede is a fast, long-legged predator that lives in damp parts of homes and hunts other small pests such as silverfish and cockroaches at night. Its speed and leg span alarm people, but it rarely bites and is considered harmless. Seeing many of them can mean there is plenty of other insect prey indoors.

Look for: A flattened yellowish-gray body about an inch long with three dark stripes and 15 pairs of very long, banded legs that make it look 3-4 inches across.

Quick facts

Size25-38 mm
LegsMany (dozens)
Usual colorstan, brown
Where in the homeBathroom
ActiveAll year
PeakMar, Apr, May, Jun, Jul, Aug
U.S. rangeNative to the Mediterranean region; introduced to the U.S. and now widespread.
Bites or stings peopleRarely

Seasons are typical across much of the U.S. and vary by region.

Seasonal pest calendarHouse Centipede: active Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec; peak Mar, Apr, May, Jun, Jul, Aug.JanFebMarAprMayJunJulAugSepOctNovDecHouse Centipede

Peak season Active Typical across much of the U.S.; varies by region.

Often confused with

Sources

Not sure this is your bug? Try the Bug Identifier or ask your local Cooperative Extension office.