North American Millipede

Scientific Name: Narceus americanus

Order & Family: Spirobolida, Spirobolidae

Size: Up to 4 inches (10 cm) in length

North American Millipede

Natural Habitat

Deciduous forests, organic leaf litter, under logs and rocks, and moist garden soil

Diet & Feeding

Detritivore; feeds on decaying plant matter, rotting wood, and occasionally fungi

Behavior Patterns

Primarily nocturnal and slow-moving. When threatened, they curl into a tight spiral to protect their soft underside and may secrete a foul-smelling liquid.

Risks & Benefits

Benefit: Vital decomposers that help cycle nutrients back into the soil. Risk: They can secrete a defensive fluid that may irritate human skin or eyes if handled.

Identified on: 5/30/2026