Portuguese Millipede

Natural Habitat

Typically found in leaf litter, decaying wood, and moist soil. They often invade houses in large numbers during autumn and spring, especially after rain, attracted by lights.

Diet & Feeding

Detritivores; they feed on decaying plant matter, fungi, and occasionally seedlings or soft parts of living plants.

Behavior Patterns

Nocturnal and attracted to light. They curl into a flat spiral when disturbed. They are known for mass migrations, particularly when seasons change or after rainfall.

Risks & Benefits

Generally harmless to humans; they do not bite or sting. However, they can secrete a yellowish, pungent fluid when handled that may stain skin or clothes and irritate eyes. They are beneficial for breaking down organic matter but can be a nuisance pest in homes.

Identified on: 3/1/2026