Giant Pill Bugs (cf Spherillo sp)

The Giant Pill Bug (cf. Spherillo sp.) is a large terrestrial isopod admired for its impressive size, smooth armoured body, and ability to roll into a perfect sphere. Native to Australia, species within the genus Spherillo are commonly found in coastal forests, woodlands, and garden environments.

Scientific Classification

• Genus: Spherillo

• Family: Armadillidae

• Common name: Giant Pill Bug

Appearance

• Noticeably larger than common backyard pill bugs

• Smooth, rounded, segmented exoskeleton

• Colour ranges from dark grey to brown, sometimes with subtle mottling

• Fully conglobates (rolls into a tight ball) when disturbed

Their hardened outer plates provide strong protection against predators and environmental stress.

Habitat & Distribution

Giant Pill Bugs occur naturally in parts of Australia, particularly in moist, sheltered habitats such as:

• Under logs and bark

• Leaf litter

• Coastal scrub and woodland

They prefer well-draining soil with consistent humidity.

Behaviour

Primarily nocturnal, these isopods emerge at night to forage for:

• Decaying leaves

• Rotting wood

• Other organic matter

As detritivores, they play a vital ecological role in breaking down organic material and enriching soil health.

When threatened, they instantly curl into a compact ball, protecting their soft underside and legs.

Invertebrate Keeping

Due to their size and hardy nature, Giant Pill Bugs are popular in bioactive enclosures and isopod collections. They require:

• A humid but well-ventilated setup

• Deep substrate with leaf litter

• Access to calcium sources for shell health

With proper conditions, they can establish thriving colonies and contribute to naturalistic terrarium ecosystems.