Marginated tortoise — Care Sheet & Morphs

Husbandry requirements

Marginated tortoise — origin: Southern mainland Greece (the Peloponnese, Mount Olympus region); introduced/naturalised populations in Sardinia and Italy. A Mediterranean species of garrigue scrubland and rocky terrain..

Terrarium temperature gradient

Night min15 °C

Cool side20–25 °C

Warm side28–32 °C

Basking spot35–40 °C

A sun-loving species requiring a genuine warm basking spot at 35-40 °C under a lamp. A night-time drop is beneficial (a fall to 12-15 °C is tolerated). Controlled winter brumation at 4-8 °C for 8-14 weeks in healthy, well-prepared individuals; never hibernate a sick, thin or unprepared juvenile animal.

Enclosure (adult)

250 × 125 × 50 cm

A planted, secure OUTDOOR enclosure (strongly recommended, essential for adults); a tortoise table or well-ventilated open terrarium for juveniles and cold periods.

Minimum indoor dimensions for one adult; the outdoor space should be far larger (aim for 8-10 m² or more per adult). Provide buried retaining walls (this tortoise digs and climbs well), hides, dry areas and edible planting. Absolutely avoid overcrowding and prolonged indoor confinement.

Humidity

40–60 %

A rather dry Mediterranean environment for adults. Juveniles need moister microclimates (60-80 % in a humid hide) and regular baths to limit pyramiding and dehydration.

Substrate

Soil/compost and sand mix (loam)Meadow hayNon-resinous bark/chips on the surface for dry areas

A loose substrate that allows digging and retains a little moisture at depth. Avoid dusty or resinous substrates (pine, cedar) and permanently waterlogged ones, which promote respiratory problems and shell rot.

UVB

Recommended

Essential. Strong desert-type UVB (10-12 % tube/lamp, target UVI 3-5 in the basking zone) replaced every 6-12 months, or better still, exposure to real sunlight outdoors (glass filters out UVB). Without adequate UVB: vitamin D3 deficiency, poor calcium uptake and metabolic bone disease.

Water source

Always available

Provide a shallow dish of clean water at all times, where the animal can drink and soak without any risk of drowning. Bathe juveniles and new animals 2-3 times a week in lukewarm water for hydration and gut transit.

Origin

Testudinidae

Southern mainland Greece (the Peloponnese, Mount Olympus region); introduced/naturalised populations in Sardinia and Italy. A Mediterranean species of garrigue scrubland and rocky terrain.

Feeding & health

Diet

Herbivore (folivore), high in fibre — None (no prey required)

A diet based on fibrous, low-protein wild plants: dandelion, plantain, clover in moderation, mallow, chicory, edible flowers, grasses and hay. A high calcium/phosphorus ratio is essential: cuttlebone available at all times and a calcium supplement. Ban fruit (save for rare exceptions), water-rich vegetables, dog/cat kibble, animal protein and plants high in oxalates/goitrogens. Too rich a diet causes pyramiding, disorganised growth and kidney problems.

Breeding

Oviparous

Clutch 4–15 eggs/young. Usually 1 to 3 clutches per season, often 3-9 eggs each (up to around 15). Incubation of roughly 60 to 100 days at 30-32 °C. Temperature-dependent sex determination (TSD): higher temperatures favour females. Provide females with a deep, loose nesting substrate.

Health watch points

Shell pyramiding (too rich a diet, unsuitable humidity/UVB)
Metabolic bone disease (MBD) from calcium/UVB/D3 deficiency
Chelonian herpesvirus: rhinitis, stomatitis, often fatal and highly contagious, requiring strict quarantine
Respiratory infections (RI) linked to cold, damp or draughts
Intestinal parasites and dehydration/kidney damage (often linked to a poor diet)

Morphs & genetics

Registry of 3 documented genes for Marginated tortoise.

Albino (T-) amelanisticRec
Hypomelanistic / Gold high yellowDom
Caramel / SepiaRec

Pairing calculator

Pick each parent's genotype — clutch probabilities update live. Free, no sign-up.

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Marginated tortoise × Marginated tortoise

Probabilities per gene (independent loci).

Expected clutchSelect at least one gene on a parent.

Frequently asked questions

Answers to the most common questions about keeping the marginated tortoise.

Is keeping a marginated tortoise regulated?▾

Yes: it is a protected species, listed on CITES Appendix II and on Annex A of European regulation 338/97. Keeping, transferring and transporting it require a CITES or intra-community certificate and often a marking declaration depending on the country. Only captive-bred and documented animals should be acquired, as wild collection is prohibited.

How big does it get as an adult?▾

It is the largest terrestrial tortoise in Europe: 25 to 35 cm of carapace length, with records exceeding 40 cm and around 5 kg. Males are longer than females, with a more pronounced 'skirt' (flared rear marginal scutes) and a more developed tail.

How long does a Testudo marginata live, and what does that imply?▾

It usually lives 60 to 90 years and can exceed a century, making it a very long-term, often multigenerational commitment. You must plan for who will care for it after you, in addition to the regulatory obligations linked to its CITES status.

Is an outdoor enclosure really essential?▾

Strongly recommended, even essential for an adult: a tortoise table or open terrarium (minimum indoor size 250 x 125 cm) is only suitable for juveniles and cold periods. Outdoors, aim for 8 to 10 m² or more per animal, with buried retaining walls since this tortoise digs and climbs very well.

Are males really aggressive toward each other?▾

Yes, and this is a crucial point to know: although docile toward humans, the male becomes extremely aggressive during the breeding season, with violent ramming, biting and harassment of females as well as other males. You must never house several males together, and it is advisable to watch over females that are being over-solicited.

Should it hibernate in winter?▾

A controlled winter brumation at 4-8 °C for 8 to 14 weeks is part of its natural cycle, but only for healthy, well-prepared individuals, never for a sick or thin animal or an unprepared juvenile. Outside this period, it needs a genuine basking hotspot at 35-40 °C.

What humidity and substrate suit it?▾

A rather dry Mediterranean environment (40-60 %) suits adults, while juveniles need a more humid microclimate (60-80 %) and regular baths to prevent dehydration and pyramiding. A loose soil/sand mix, topped with hay and non-resinous bark on the surface, allows digging without retaining too much moisture.

What should you feed it?▾

A herbivorous, fibrous diet based on wild plants low in protein: dandelion, plantain, clover in moderation, mallow, chicory, edible flowers, grasses and hay. Cuttlebone and a calcium supplement are essential, whereas fruit, water-rich vegetables, dog or cat kibble and animal protein must be avoided.

Is UVB lighting necessary?▾

Essential: a strong desert-type UVB (10-12 % tube or lamp, UVI 3-5 in the basking zone), replaced every 6 to 12 months, or better still exposure to real sunlight outdoors since glass filters out UVB. Without it, a vitamin D3 deficiency leads to poor calcium fixation and metabolic bone disease.

How does it reproduce?▾

It is an oviparous species that usually lays 1 to 3 times per season, often 3 to 9 eggs per clutch, up to 15. Incubation lasts about 60 to 100 days at 30-32 °C, and the sex of the juveniles depends on temperature: the warmer it is, the more females are favored.

What health problems should you fear in particular?▾

Beyond pyramiding and metabolic bone disease linked to diet and UVB, chelonian herpesvirus is a serious threat specific to this group: rhinitis, stomatitis, often fatal and highly contagious, requiring strict quarantine for every newcomer. Respiratory infections linked to cold or humidity and intestinal parasites round out the list of the most common concerns.

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