Porcellio Scaber (grey)

The Grey Isopod (Porcellio scaber “Grey”) is the natural, wild-type form of the common rough woodlouse. Known for its hardy nature and adaptable behaviour, this classic grey variety is one of the most widespread and resilient terrestrial isopods in the world.

Scientific Classification

• Scientific name: Porcellio scaber

• Family: Porcellionidae

• Common name: Grey Isopod

Appearance

• Medium-sized, elongated body

• Distinct rough, textured exoskeleton

• Slate grey to charcoal coloration, sometimes with lighter mottling

• Prominent segmented plates

• Does not roll into a tight ball

The neutral grey colouring provides excellent camouflage among soil, bark, and leaf litter.

Natural Background

Porcellio scaber is native to Europe but has become globally distributed. It is commonly found in:

• Gardens and suburban environments

• Woodland leaf litter

• Compost piles

• Under logs, rocks, and bark

The Grey form represents the natural wild-type coloration of the species.

Behaviour

Active and resilient, Grey Isopods are efficient detritivores that feed on:

• Decaying leaves

• Rotting wood

• Plant debris

• Organic waste

They are fast-moving and rely on concealment rather than curling into a ball when disturbed.

Invertebrate Keeping

Grey Porcellio scaber are ideal for beginners and bioactive setups due to their:

• High adaptability

• Strong breeding rates

• Tolerance of varied humidity levels

For best results, provide:

• A moisture gradient within the enclosure

• Ample leaf litter and hiding spaces

• Good ventilation

• A calcium source to support healthy moulting

With proper care, they form robust, self-sustaining colonies and serve as highly effective clean-up crews in naturalistic terrariums.