Snake Millipede

Snake millipedes are slender, cylindrical members of the millipede family Blaniulidae, named for their smooth, elongated, snake-like body form when compared to the more robust build of many other millipede groups. The genus Blaniulus includes species found across parts of Europe and introduced to other temperate regions, where they live in soil and decaying organic matter.

These millipedes have a pale, glossy, whitish to yellowish body that in some species is marked with a faint row of small reddish-orange spots along each side, corresponding to the position of tiny defensive glands common to many millipedes. Like other millipedes, they move slowly using many pairs of short legs in a smooth wave-like motion and curl tightly into a spiral when disturbed rather than fleeing quickly.

Snake millipedes are detritivores, feeding on decaying plant material in soil and leaf litter, and they are most often noticed in gardens, compost, and agricultural soils where they occasionally feed on soft plant tissue in addition to decomposing matter.

• Slender, smooth, cylindrical body that appears glossy and worm-like or snake-like compared to bulkier millipede species.
• Pale whitish to pale yellow overall coloration, sometimes with a faint row of small reddish-orange spots along each side of the body.
• Numerous short legs, two pairs per body segment, moving in a smooth rippling wave along the length of the body.
• Adults typically measure 10-20 mm, making them notably smaller and more delicate than many larger millipede species.
• Curls into a tight, flat spiral when disturbed rather than rolling into a ball, distinguishing it from pill millipedes.

Snake millipedes live in moist, organically rich soil, leaf litter, and decaying vegetation, favoring shaded and consistently damp environments such as garden beds, compost piles, and cultivated fields. They are found across much of temperate Europe and have been introduced to other regions with suitable climate and soil conditions. Activity is generally concentrated in the cooler, moister parts of the year, with the millipedes retreating deeper into soil during hot, dry conditions.

Snake millipedes are primarily detritivores, feeding on decomposing plant material, root debris, and organic matter within the soil, though they will occasionally feed on soft seedling roots or germinating seeds when decaying material is scarce. They move slowly through soil and leaf litter using coordinated leg movements and, when disturbed, curl into a tight spiral as a defensive posture rather than attempting to flee. Within the soil ecosystem, they contribute to the breakdown of organic matter and nutrient cycling, and they serve as prey for various soil-dwelling predators such as centipedes, ground beetles, and some birds.

Female snake millipedes lay eggs in small clusters within moist soil or leaf litter, which hatch into tiny young millipedes with only a few body segments and legs. As they grow, young millipedes molt repeatedly, adding both segments and additional pairs of legs with each molt, gradually approaching the adult body plan over the course of several months to about a year. Adults continue to molt periodically throughout their lives, and many species can live for a couple of years, with reproduction and activity peaking during mild, moist seasons.