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Millipedes

Active Seasons

Illustration representing the spring season
Illustration representing the summer season
Illustration representing the winter season
Illustration representing the fall season

Appearance and Size Facts

  • Brownish-black or mottled with shades of orange, red, or brown
  • Cylindrical in shape or slightly flattened
  • Most have two pairs of legs per body segment, except for the first three segments which have only one pair of legs
  • Antennae are short, usually seven-segmented, and the head is rounded with no poison jaws
  • Their short legs ripple in waves as they glide over a surface
  • Millipedes often curl up into a tight "C" shape and remain motionless when touched
  • Size: Range from 0.08 to 14 inches in length

Behavior and Habitat of Millipedes

Millipedes feed on living and decomposing vegetation and occasionally on dead snails, earthworms, and insects. Slight feeding injury can occur on soft-stemmed plants, in gardens, and in greenhouses. They cannot tolerate water-saturated soil, which forces them to the surface and higher ground. Likewise, dry, drought conditions can stimulate migration. Millipedes are attracted to dark, cool, and moist environments. They are nocturnal and often leave their natural habitats at night to crawl about over sidewalks, patios, and foundations. At certain times of the year, especially during fall, they may migrate into buildings in great numbers. Fall movement into structures appears to be accidental, occurring in the course of searching for humid sites (as a winter habitat). Migration into buildings is also common during spring and summer, in conjunction with periods of excessively wet or dry weather.

Image of a magnifying glass

Signs of Infestation of Millipedes

Millipedes are not poisonous but many species have glands capable of producing irritating fluids which may produce allergic reactions in individuals sensitive to insects or insect toxins. A few millipede species are capable of squirting these fluids over a distance of several inches. Persons handling millipedes will notice a lingering odor on their hands and the fluid can be dangerous to the eyes. It is not advisable to handle millipedes but when one has been held, hands should be washed with soap and water until the odor is completely gone.

An illustration representing a warning sign for bug infestation

Tips for Prevention of Millipedes

Reduce moisture in and around your home using a dehumidifier. Keep lawns mowed so that grass does not retain moisture and water lawns in the early morning to allow grass to dry during the day. Remove leaf piles and grass clippings. Store firewood off of the ground.

A cropped image of a pencil

Millipede Gallery

Photograph of millipede
Photograph of millipede number 2
Photograph of millipede number 3

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