Woodlouse (specifically Common Woodlouse)

Scientific Name: Oniscus asellus

Order & Family: Order Isopoda; Family Oniscidae

Size: Up to 16 mm in length

Woodlouse (specifically Common Woodlouse)

Natural Habitat

Moist, dark environments such as under rocks, logs, leaf litter, and occasionally damp indoor basements.

Diet & Feeding

Detritivore; eats decaying organic matter, fungi, and rotting vegetation.

Behavior Patterns

Nocturnal; they require moisture to breathe through gill-like structures and will congregate in damp areas to avoid dehydration.

Risks & Benefits

Harmless to humans; they benefit the ecosystem by breaking down organic matter and recycling nutrients back into the soil.

Identified on: 6/12/2026