Indonesian blue-tongued skink — Care Sheet & Morphs

Husbandry requirements

Indonesian blue-tongued skink — origin: Indonesia (Halmahera and the Moluccas), New Guinea (Merauke region, Papua) and the Kei Islands; lowland tropical rainforests. Note: many specimens in the trade are imported wild-caught animals, requiring strict quarantine and a veterinary parasite screening. A non-venomous species not listed under CITES/EU, but subject to Indonesian export quotas..

Terrarium temperature gradient

Night min20 °C

Cool side22–26 °C

Warm side28–32 °C

Basking spot35–40 °C

A diurnal, heliophilic species requiring a genuine hot basking spot (surface 35-40 °C) at one end, with a marked thermal gradient towards the cool zone. A nighttime drop down to ~20 °C is acceptable. Check temperatures with a thermometer/infrared gun.

Enclosure (adult)

120 × 60 × 45 cm

Terrestrial terrarium (humid tropical vivarium)

Minimum for one adult; favour floor space over height. The large Merauke forms benefit from a bigger enclosure (150 x 60 cm). Provide hides at both ends and a humid area.

Humidity

60–80 %

Requires higher humidity than T. scincoides. Maintain 60-80 % via a moist substrate, daily misting and a humid area, while ensuring good ventilation to prevent mould and scale rot.

Substrate

Coco fibreOrchid barkCypress mulchFertiliser- and pesticide-free topsoil

A loose substrate at least 8-10 cm deep that retains moisture and allows burrowing. Avoid dusty substrates or those with dry fine particles (risk of ingestion and impaction). Remove droppings regularly and watch for mould.

UVB

Recommended

Recommended: linear T5 UVB tube 5-6 % (UV index 3-4 at the basking spot), replaced every 12 months. Promotes calcium metabolism and diurnal activity.

Water source

Always available

A large bowl of fresh water renewed daily, wide enough to let the skink soak; it helps with humidity and eases shedding.

Origin

Scincidae

Indonesia (Halmahera and the Moluccas), New Guinea (Merauke region, Papua) and the Kei Islands; lowland tropical rainforests. Note: many specimens in the trade are imported wild-caught animals, requiring strict quarantine and a veterinary parasite screening. A non-venomous species not listed under CITES/EU, but subject to Indonesian export quotas.

Feeding & health

Diet

Omnivore — Insects (cockroaches, earthworms), snails and gastropods, cooked lean meats or egg, supplemented with leafy greens and a small share of fruit.

Adult: a predominantly plant-based ration (~50-60 % vegetables) plus varied animal protein; juveniles are more carnivorous and fed more often. Dust with calcium (+ D3 depending on UVB) and limit sugary fruit. Avoid overfeeding (prone to obesity). Feed an adult 2-3 times a week.

Breeding

Viviparous

Gestation of about 3-4 months. The young are born independent and must be raised separately to avoid competition and bites. Requires a slight seasonal cooling cycle to stimulate breeding.

Health watch points

Internal parasites (common in wild-caught specimens; faecal exam and deworming on arrival)
Respiratory infections (temperatures too low or poorly managed humidity)
Metabolic bone disease / MBD (calcium deficiency or insufficient UVB)
Obesity (overfeeding, excess protein or fruit)
External mites and difficult sheds (dysecdysis) linked to unsuitable humidity

Morphs & genetics

Registry of 0 documented gene for Indonesian blue-tongued skink.

Frequently asked questions

Answers to the most common questions about keeping the indonesian blue-tongued skink.

How big does an adult Indonesian blue-tongued skink get?▾

It depends heavily on the subspecies: Keyensis stay around 40-45 cm, Halmahera reach 45-50 cm, while the giant Merauke form can grow to 60-70 cm. It is therefore useful to know the precise origin of your animal before sizing the terrarium.

What size terrarium should you provide for an adult?▾

A minimum of 120 x 60 x 45 cm is recommended, favouring floor space over height since this is a terrestrial species. The large Merauke forms benefit from an even more spacious enclosure, around 150 x 60 cm, with hides at both ends.

Why does this species have a reputation for being more nervous than the Australian skink?▾

Unlike Tiliqua scincoides, which are often captive-bred, many Tiliqua gigas in the trade are imported wild-caught animals, which explains their more skittish behaviour: hissing, body inflation and possible bites when the animal feels threatened. With regular, short and gentle handling it will nonetheless become tame over time.

What humidity level should be maintained in the terrarium?▾

This tropical skink requires markedly higher humidity than its Australian cousins, between 60 and 80%. You need to mist daily, keep a moist substrate zone and ensure good ventilation to avoid mould and scale rot.

What temperature gradient should you offer it?▾

A genuine basking hot spot between 35 and 40 °C is needed at one end of the terrarium, with a warm zone around 28-32 °C and a cool side between 22 and 26 °C. At night, a drop to 20 °C is well tolerated.

Is UVB lighting necessary?▾

Yes, a linear T5 UVB tube at 5-6% is recommended to achieve a UV index of 3-4 at the hot spot, to be replaced every 12 months. It supports calcium metabolism as well as the animal's natural diurnal activity.

What does a Tiliqua gigas eat day to day?▾

It is an omnivore that enjoys insects, snails and gastropods, a little lean cooked meat or egg, supplemented with leafy green vegetables and a small portion of fruit. The adult feeds mainly on plant matter (50-60%) two to three times a week, with a calcium dusting at every meal.

Which substrate should you choose for this burrowing species?▾

A loose, moist substrate at least 8 to 10 cm deep is essential, for example coco fibre, orchid bark or fertiliser-free topsoil. Avoid dusty, fine-particle substrates, which pose a risk of accidental ingestion and impaction.

How long does this skink live in captivity?▾

Its lifespan is generally between 15 and 20 years, and can exceed 20 years when diet and care are well suited. It is therefore a very long-term commitment to anticipate before acquisition.

How does the Tiliqua gigas reproduce?▾

The species is viviparous: after a gestation of 3 to 4 months, the female gives birth to 5 to 15 already-independent young, which must be separated quickly to avoid competition and bites. A slight seasonal cooling cycle usually stimulates breeding.

Which health problems should you watch for in this species?▾

Wild-caught individuals frequently arrive parasitised, hence the value of a faecal exam on arrival. The other classic risks are respiratory infections linked to poorly managed humidity or temperature, metabolic bone disease from a UVB or calcium deficiency, and obesity in case of overfeeding.

What water source should you provide in the terrarium?▾

A large bowl of fresh water, renewed daily and wide enough for the skink to immerse itself, contributes to ambient humidity and eases shedding.

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