Greenhouse Millipede

Scientific Name: Oxidus gracilis

Order & Family: Polydesmida: Paradoxosomatidae

Size: 18.5 to 23 mm (0.7 to 0.9 inches) in length

Greenhouse Millipede

Natural Habitat

Damp soil, leaf litter, and under rocks; frequently found in gardens, greenhouses, and around residential foundations.

Diet & Feeding

Mostly decaying organic matter and leaf litter, occasionally feeding on soft plant tissues.

Behavior Patterns

Nocturnal and moisture-loving; they often migrate in large numbers during wet periods. When threatened, they curl into a tight spiral and can release a pungent defensive fluid containing hydrogen cyanide.

Risks & Benefits

Generally harmless to humans but can be a nuisance in large numbers; they benefit the ecosystem by breaking down organic matter into nutrient-rich soil.

Identified on: 6/28/2026