Essential Millipede Information

Millipedes are elongated, segmented arthropods known for their many legs — with two pairs per body segment. While they’re often mistaken for centipedes, millipedes are generally harmless and far less aggressive. There are thousands of millipede species worldwide, but a few are commonly found in or near homes. Here's a look at some typical types:

1. Common Black Millipede (Narceus americanus)

These large, dark brown to black millipedes can grow up to 4 inches long. They often live in mulch, under logs, or in damp basements. When disturbed, they curl into a tight coil and may release a mild defensive secretion.

2. Greenhouse Millipede (Oxidus gracilis)

Smaller and more slender than the common black millipede, this species is light brown to dark brown with distinct segment lines. They are frequently found in greenhouses, flowerbeds, and moist areas around the home.

3. Flat-Backed Millipede (Polydesmida family)

Easily recognized by their flattened body shape and prominent segment ridges, these millipedes often emit a strong odor when threatened. They're usually brown or black and prefer damp leaf litter or decaying wood.

4. Bristly Millipede (Polyxenida order)

Tiny, soft-bodied, and covered in fine hairs, bristly millipedes are harmless and often found in moist soil. They’re more likely to be seen in gardens than indoors.

Millipedes in the Home:
While millipedes are not dangerous and do not damage structures or belongings, they may become a nuisance when they migrate indoors, especially during heavy rains or droughts. They prefer dark, moist environments and often die quickly inside due to dry conditions.

If millipedes are becoming a recurring problem, sealing entry points, reducing moisture, and removing outdoor debris can help — or consider professional pest control for a lasting solution.