Marginated Tortoise (Testudo marginata) Care Sheet
The Marginated Tortoise is a large Mediterranean tortoise native primarily to Greece, with populations extending into neighbouring areas of the southern Balkans and introduced populations elsewhere.
It is named for the distinctive flared rear marginal scutes of the shell, which become particularly pronounced in mature animals. Adults are robust, active tortoises that require considerably more space than their relatively small juvenile size might suggest.
Correct husbandry centres around a spacious environment, intense basking heat, appropriate UVB exposure, a high-fibre herbivorous diet and access to natural grazing wherever possible.
Quick Facts
Scientific name: Testudo marginata
Common name: Marginated Tortoise
Family: Testudinidae
Origin: Southeastern Europe, particularly Greece
Adult size: Commonly 25–35 cm (10–14 in), occasionally larger
Lifespan: 50+ years; potentially considerably longer
Activity: Diurnal
Diet: Herbivorous
Temperament: Generally active and inquisitive
Experience level: Intermediate
Natural History
Marginated Tortoises inhabit dry Mediterranean environments including scrubland, rocky hillsides, grassland and areas of sparse woodland.
They experience strong seasonal changes in temperature and activity.
Much of their day is spent moving between feeding areas, basking sites and shelter. During particularly hot conditions they may retreat beneath vegetation or into shaded areas before becoming active again as temperatures moderate.
Their natural diet consists predominantly of fibrous grasses, leaves, weeds and flowers.
Captive husbandry should therefore provide abundant space, intense but localised basking heat, UVB exposure and a varied high-fibre diet.
Enclosure
Marginated Tortoises are active animals and require substantial floor space.
Small vivariums and aquariums are unsuitable as permanent adult accommodation.
Young animals can initially be maintained in appropriately sized indoor accommodation, but enclosure size must increase as the tortoise grows.
An adult should ideally have access to a large secure outdoor enclosure whenever weather permits, supplemented by suitable heated accommodation during periods when outdoor conditions are inappropriate.
Indoor accommodation for adults should provide several square metres of usable floor space wherever possible.
The enclosure should contain:
- Open basking areas
- Cooler retreats
- Dry hides
- Natural soil
- Rocks
- Logs
- Edible vegetation
- Areas of shade
- Different terrain and elevations
Marginated Tortoises are capable diggers and surprisingly effective climbers.
Outdoor perimeter walls should therefore be secure, sufficiently high and extend below ground where necessary.
The tortoise should not be able to see continuously through the perimeter, as transparent barriers can encourage persistent attempts to escape.
Temperature & Heating
A strong thermal gradient is essential.
Suitable temperatures are approximately:
Basking surface: 35–40°C
Warm area: approximately 25–30°C
Cool area: approximately 20–24°C
Temperatures can fall naturally overnight provided the animal is healthy and conditions remain appropriate.
Indoor basking should be supplied from above.
For larger animals, several lamps may be required to create a basking zone broad enough to warm the entire body rather than concentrating intense heat onto one small area of shell.
Where thermostatic control is appropriate, heat sources should be controlled using equipment suitable for the type of heater being used.
Temperatures should be checked using reliable digital thermometers, and an infrared thermometer is particularly useful for measuring basking surface temperature.
Lighting & UVB
Marginated Tortoises require access to high-quality UVB radiation.
Animals maintained indoors should be provided with a suitable linear T5 UVB lamp positioned above the basking zone.
Aim to provide approximately:
UVI 3–4 at the basking area
with lower UV levels and shaded areas elsewhere so the tortoise can regulate its exposure.
The UVB source should overlap the basking area, allowing heat, visible light and ultraviolet radiation to be accessed together.
UV output depends upon:
- Lamp strength
- Reflector
- Distance from the animal
- Mesh or screening
- Lamp age
Manufacturer recommendations should therefore be followed and, ideally, UV levels verified with a suitable UV meter.
Provide approximately 12–14 hours of daylight during the active summer season, with seasonal variation where appropriate.
Natural unfiltered sunlight is extremely beneficial when weather conditions permit.
UVB does not effectively penetrate ordinary window glass.
Humidity & Hydration
Marginated Tortoises originate from relatively dry environments, but this does not mean they should be kept chronically dehydrated.
Fresh drinking water must always be available.
Juveniles particularly benefit from access to slightly more humid retreats and should not be maintained in excessively dry conditions.
A suitable enclosure should provide a moisture gradient rather than being uniformly wet or completely desiccated.
Good ventilation is essential.
Young tortoises can also be given regular supervised shallow soaks to support hydration.
Water
Provide a shallow, heavy water dish large enough for the tortoise to enter.
The dish should:
- Be easy to access
- Have shallow sides
- Allow easy exit
- Be difficult to overturn
- Contain clean fresh water
Water should be changed whenever contaminated.
Tortoises frequently defecate while soaking, so dishes may require cleaning more than once per day.
Substrate
Naturalistic soil-based substrates are recommended.
Suitable options include:
- Organic topsoil
- Reptile-safe soil mixtures
- Soil mixed with a smaller proportion of sand
- Natural Mediterranean-style substrates
Provide sufficient depth for natural digging behaviour.
Different areas can contain varying substrate depth and moisture levels.
Avoid:
- Calcium sand
- Pure sand
- Wood shavings
- Cedar
- Pine
- Corn cob
- Cat litter
- Gravel
Hard flooring should not be used as the sole permanent substrate.
Furnishing & Enrichment
Marginated Tortoises are active animals and benefit considerably from environmental complexity.
Suitable enrichment includes:
- Rocks
- Logs
- Soil banks
- Edible plants
- Grass clumps
- Different substrate depths
- Shaded areas
- Multiple hides
- Changes in elevation
The enclosure should encourage walking, climbing, grazing and exploration.
Ensure rocks and heavy furnishings cannot collapse if the tortoise digs beneath them.
Outdoor enclosures can be planted with safe edible weeds, allowing natural grazing behaviour.
Diet
Marginated Tortoises are primarily high-fibre herbivores.
Their captive diet should consist predominantly of weeds, leaves and flowers rather than fruit or supermarket vegetables.
Excellent foods include:
- Dandelion
- Plantain
- Sow thistle
- Hawkbit
- Cat’s ear
- Clover in moderation
- Mallow
- Vetch
- Hibiscus
- Mulberry leaves
- Grape leaves
- Rose petals
- Nasturtium
- Safe grasses and weeds
Correct plant identification is essential.
Only collect wild plants from areas known to be free from pesticides, herbicides, road contamination and animal fouling.
When suitable weeds are unavailable, carefully selected leafy greens can supplement the diet.
Foods to Avoid
Fruit should generally not form part of the routine diet of Marginated Tortoises.
Their digestive system is adapted to fibrous vegetation rather than a high-sugar diet.
Avoid routinely feeding:
- Banana
- Apple
- Grapes
- Citrus
- Tomato
- High-sugar fruit
- Meat
- Dog or cat food
- Dairy products
- Bread
- Processed human foods
Iceberg lettuce provides very little useful nutrition and should not form a significant part of the diet.
High-protein foods are inappropriate.
Calcium & Supplementation
Calcium is essential for normal skeletal and shell development.
A piece of cuttlebone can remain available within the enclosure.
Food can also be lightly dusted with an appropriate calcium supplement according to diet, age and UVB exposure.
Growing juveniles and reproductive females have particularly high calcium requirements.
Vitamin supplements should be used appropriately rather than excessively.
Healthy bone and shell development depends upon the combination of:
- Calcium
- Appropriate UVB exposure
- Vitamin D3 metabolism
- Correct diet
- Hydration
- Exercise
- Appropriate growth rate
Calcium supplementation cannot compensate for inadequate UVB or poor overall husbandry.
Feeding Juveniles
Juvenile Marginated Tortoises require frequent access to appropriate vegetation.
Growth should be steady rather than excessively rapid.
Young tortoises should not be deliberately overfed in an attempt to produce rapid growth.
A varied high-fibre diet, good hydration, correct temperatures, calcium and appropriate UVB exposure are essential throughout development.
Handling
Marginated Tortoises generally tolerate necessary handling but should not routinely be carried around unnecessarily.
When lifting:
- Support the entire body
- Use both hands
- Keep the animal upright
- Never lift by the limbs or tail
- Avoid unnecessary prolonged handling
Whenever possible, interaction should occur with the tortoise remaining on the ground.
Always wash hands after handling reptiles or their enclosure equipment.
Health
Common husbandry-related health concerns include:
- Metabolic bone disease
- Abnormal shell development
- Respiratory infections
- Dehydration
- Parasites
- Nutritional deficiencies
- Shell damage
- Beak overgrowth
- Reproductive disease
- Gastrointestinal obstruction
Warning signs include:
- Persistent loss of appetite
- Weight loss
- Nasal discharge
- Bubbles around the nose
- Noisy breathing
- Swollen or closed eyes
- Lethargy
- Weakness
- Difficulty walking
- Soft shell in growing animals
- Abnormal faeces
- Significant behavioural changes
Regular weighing is useful for monitoring condition.
New tortoises should ideally undergo quarantine and appropriate veterinary assessment before being introduced near established animals.
Persistent or serious symptoms require assessment by a suitably experienced reptile/exotic veterinarian.
Shell Growth
Healthy shell growth should be relatively smooth.
Pronounced pyramiding of individual scutes is abnormal and is associated with inappropriate environmental and nutritional conditions during growth.
Correct development requires the combined provision of:
- Appropriate hydration
- Suitable humidity
- Strong UVB
- Adequate calcium
- High-fibre nutrition
- Correct temperatures
- Exercise
- Controlled growth
Once significant shell deformity has developed it cannot simply be reversed, making prevention particularly important.
Brumation / Hibernation
Healthy adult Marginated Tortoises naturally experience a period of winter dormancy within much of their native range.
However, hibernation should never be undertaken casually.
Only healthy animals of suitable size and condition should be considered for controlled hibernation.
Before hibernation, the keeper must understand:
- Pre-hibernation health assessment
- Appropriate fasting and preparation
- Hydration
- Safe temperature ranges
- Weight monitoring
- Suitable hibernation methods
- Emergency termination criteria
- Safe post-hibernation recovery
Sick, underweight or otherwise unsuitable animals should not be hibernated.
A reptile-experienced veterinarian should be consulted where there is any uncertainty regarding an individual animal’s suitability.
Breeding
Marginated Tortoises can reproduce readily when maintained under suitable conditions.
Males may become persistent or aggressive towards females during courtship.
Females require sufficient space to avoid males and must have access to deep, suitable nesting substrate.
Reproductive females have substantial calcium requirements.
Repeated breeding can place considerable physiological demands on females, so animals must be carefully monitored.
Egg incubation and hatchling care should be thoroughly researched before breeding is attempted.
Social Housing
Although tortoises may appear sociable, they do not require companionship in the way social mammals do.
Multiple animals can compete for:
- Food
- Basking positions
- Hides
- Space
- Access to females
Adult males can be particularly territorial and persistent.
Animals housed together require considerably more space, multiple resources and careful observation.
Individuals must be separated if bullying, persistent mating behaviour, biting, ramming, food guarding or chronic avoidance occurs.
Keeping a single Marginated Tortoise is entirely acceptable.
Legal & Responsible Ownership
The Marginated Tortoise is listed under CITES Appendix II and is subject to wildlife trade controls.
Within the European context, Testudo marginata is included in Annex A of the retained/EU wildlife trade framework, meaning documentation requirements can apply to commercial activities involving these animals.
Keepers should ensure that animals are obtained with the correct legal documentation and should retain all relevant paperwork for the lifetime of the animal.
Requirements can differ according to jurisdiction and can change over time, so current rules should always be confirmed before buying, selling, breeding or transporting an animal internationally.
Captive-bred animals from legitimate sources should always be preferred.
Never release a captive tortoise into the wild.
Long-Term Commitment
Marginated Tortoises can live for many decades and may outlive their original keeper.
Their adult size also means considerably more accommodation is required than many prospective owners initially expect.
Before acquiring one, consider:
- Adult enclosure size
- Outdoor accommodation
- Heating and electricity
- UVB replacement
- Winter management
- Veterinary care
- Holiday care
- Legal documentation
- Their potentially very long lifespan
Planning for the animal’s long-term care is an important part of responsible ownership.
Summary
The Marginated Tortoise is a robust and fascinating Mediterranean species but requires significantly more space and environmental complexity than its small juvenile size suggests.
Successful long-term husbandry depends upon providing large accommodation, intense basking heat, strong UVB exposure, naturalistic substrate, excellent hydration and a varied high-fibre weed-based diet.
Access to a secure outdoor enclosure during suitable weather provides considerable benefits.
Their long lifespan, adult size and regulated trade status mean that acquiring a Marginated Tortoise should always be considered a substantial long-term commitment.
IMPORTANT INFORMATION
This care sheet provides general husbandry guidance and does not replace species-specific research or veterinary advice. Individual requirements may vary.
If you have concerns about an animal’s health or care, consult a suitably experienced exotic or reptile veterinarian.
Information correct at the date of publication.
reptilecommunity.com | Revised: August 2026