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Greek pill woodlouse (Armadillidium gestroi)

Greek pill woodlouse (Armadillidium gestroi), typical appearance of the species

Invertebrates · Difficulty: Beginner

Key facts and care guidance for Greek pill woodlouse (Armadillidium gestroi) (origin: Nordwest-Italien: nur an einem kurzen Küstenstreifen Liguriens (Riviera di Ponente) – der Handelsname „Griechische“ ist irreführend). Adult size around approx. 1.5–2.0 cm (one of the largest Armadillidium). Life expectancy approx. 2–3 years. The values below are carefully researched guidance.

Short answers

Greek pill woodlouse: How big does the enclosure need to be?

A box from 25×20×15 cm for a colony (a larger species); a colony animal.

Greek pill woodlouse: What temperature does it need?

Daytime 21–26 °C, at night 18–22 °C.

Greek pill woodlouse: Does it need UVB lighting?

UVB: No UVB needed.

Greek pill woodlouse: How long do they live?

Life expectancy: approx. 2–3 years.

Greek pill woodlouse: Is it suitable for beginners?

Yes – it is considered suitable for beginners (difficulty: Beginner).

Climate

Daytime temperature
21–26 °C
Night temperature
18–22 °C
Basking spot
—
Humidity
55–70 % (with one humid area)
UVB
No UVB needed

Enclosure

Minimum size
a box from 25×20×15 cm for a colony (a larger species); a colony animal
Substrate
Soil or coco with plenty of leaf litter, rotten pale wood and cork bark; one damp corner (sphagnum); it likes things a little damper and less ventilated than other pill woodlice

Feeding

Food
Fallen leaves, rotten pale wood, vegetables; protein (dried shrimp) and calcium (cuttlebone or shell grit)
Feeding interval
protein and vegetables 1–2×/week, leaf litter and wood always available

Key facts

Adult size
approx. 1.5–2.0 cm (one of the largest Armadillidium)
Life expectancy
approx. 2–3 years
Origin
Nordwest-Italien: nur an einem kurzen Küstenstreifen Liguriens (Riviera di Ponente) – der Handelsname „Griechische“ ist irreführend
Protection status
Not protected (no CITES, no German Federal Nature Conservation Act listing)
Brumation
None (a European species; a cooler overwintering is possible but not essential)
Cohabitation
Colony. Isopods are gregarious and are kept as a group – 10 to 15 animals to start; a single animal cannot breed. Provide plenty of hides so adult males can avoid each other. Only this one species per tub: a faster-breeding isopod will crowd out the rather slow gestroi in the long run.

Notes

A robust, diurnal pill woodlouse with striking black-and-yellow markings; it rolls into a ball. It likes it damper and more sheltered than, for example, zebra isopods. Note the discrepancy between the name and the origin (its scientific distribution is Italy and France).

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Related species

All species in the care wiki →

What you need to start

To keep Greek pill woodlouse (Armadillidium gestroi) you typically need: a suitable enclosure (a box from 25×20×15 cm for a colony (a larger species); a colony animal), substrate (Soil or coco with plenty of leaf litter, rotten pale wood and cork bark; one damp corner (sphagnum); it likes things a little damper and less ventilated than other pill woodlice), a heat source with a thermostat, UVB lighting, thermometer and hygrometer, a water dish and hides. You will find equipment in the Reptoria marketplace.

The complete, interactive care database is in the Reptoria app.

Last updated: 9 October 2026 · Editor: Reptoria editorial team · Sources include: https://en.wikipedia.org/wiki/Armadillidium_gestroi, https://postpods.co.uk/blogs/isopods-useful-articles/gestroi-isopod-care, https://en.wikipedia.org/wiki/Woodlouse, https://postpods.co.uk/blogs/isopods-useful-articles/care-for-armadillidium-isopods, https://postpods.co.uk/blogs/isopods-useful-articles/keeping-different-isopods-together

All values are non-binding guidance and do not replace expert advice. Research thoroughly from several sources before acquiring and keeping an animal, and observe the applicable law (species and animal protection in particular).