Blue-tongued skink care: setup, diet, UVB and health
Published by Planète Pets · managing editor: Clément Lacaille · reference guide rewritten with every source checked
The blue-tongued skink (genus Tiliqua) is a large, placid, hardy ground lizard that lives 15 to 20 years. Keeping one well comes down to floor space (at least 120 x 60 cm for an adult), a basking spot around 33-35 °C with a cool side at 24-26 °C, UVB lighting, loose substrate deep enough to dig in, and a varied diet of roughly half protein and half plants, without overdoing it: obesity is its most common health problem in captivity. This guide brings together everything you need to set it up and care for it day to day.
Contents · 9 sections
Care sheet at a glance
| Parameter | Value |
|---|---|
| Lifespan | 15 to 20 years |
| Adult length | 45 to 60 cm |
| Minimum enclosure (L x W x H) | 120 x 60 x 45 cm |
| Basking spot | 33 to 35 °C |
| Cool side | 24 to 26 °C |
| Humidity | 40 to 60% |
| UVB | Essential (diurnal species) |
| Substrate | 10 to 15 cm of loose, diggable substrate |
| Adult meals | 2 to 3 per week |
| Health issues to watch | Obesity from overfeeding, metabolic bone disease, retained shed on the toes |
These are consensus ranges and vary a little between species (the eastern blue-tongue Tiliqua scincoides and the Indonesian blue-tongue Tiliqua gigas are the most common in the hobby). The full species profile is on our blue-tongue skink page.
The enclosure: floor space over height
This lizard walks, forages and digs; it is not a climber. Length and width matter far more than height: 120 x 60 cm of floor is a minimum for an adult, and bigger is always better. Provide at least two hides, one on the warm side and one on the cool side, sturdy enough to take its weight when it climbs on top or digs underneath. A wide, stable water bowl that it cannot tip over completes the setup.
Substrate is its main enrichment: 10 to 15 cm of a loose mix (soil and coco fibre, for example) lets it burrow, churn the ground and hunt for food. Keep one corner slightly damp to help with shedding. Our guide to enrichment through digging and hides has practical ideas.
Heat and UVB: what a 2025 study changed
Put the basking lamp at one end, controlled by a thermostat, to create a 33-35 °C hot spot and let the other end drop to 24-26 °C. Check with two thermometers, one at each end, at floor level.
On UVB, long debated for this lizard, the evidence is now clear. A study by Godke et al., published in 2025 in Veterinary Sciences, followed eleven adult eastern blue-tongued skinks fed wet cat food and exposed to UVB for 12 hours or 2 hours a day for four weeks. Before exposure their blood vitamin D levels were very low; afterwards they had risen sharply in both groups. Vitamin D from the cat food alone was not enough to keep levels up, and the authors conclude that these skinks rely on UVB for their vitamin D.
| Group | Before UVB | After 4 weeks of UVB | After UVB was stopped |
|---|---|---|---|
| 12 h UVB per day | 18.5 nmol/L | 820 nmol/L | No longer different from baseline at 7 months |
| 2 h UVB per day | 22 nmol/L | 635 nmol/L | No longer different from baseline at 4 months |
Two practical lessons: a UVB tube is basic equipment, not an optional extra; and a lamp failure of a few days is not an emergency, since vitamin D stays high for months. The study, funded by a reptile products company that played no part in its analysis, does not say which daily duration is ideal: follow your lamp manufacturer’s guidance and replace it according to its stated lifespan. Our article on how long vitamin D lasts in skinks covers this study in detail.
Feeding an opportunistic omnivore
In the wild, blue-tongued skinks eat whatever they find on the ground. A study by Shea, published in 2006 in Australian Zoologist, examined the stomach contents of 30 museum specimens of two Australian species (Tiliqua multifasciata and T. occipitalis). Most stomachs held plant material, mainly fruit and seeds; arthropods, chiefly insect larvae and beetles, were less frequent, and the few vertebrates were mostly carrion. These two species are not the ones most often kept as pets, but the study confirms the genus’s active omnivore profile.
In captivity, the recommended base is roughly half protein (insects, snails, some lean meat or quality wet food) and half vegetables, with a little fruit as a treat and a dusting of calcium. Adults eat 2 to 3 times a week; juveniles more often. The main mistake is overfeeding: this lizard happily eats everything offered and gains weight fast. Weigh it regularly and adjust. Our guide to feeding a blue-tongue skink gives sample menus.
Handling and behaviour
Calm and curious, it recognises its keeper and usually accepts handling after a settling-in period. Always support the whole body, close to the ground, and avoid grabbing it from above as a predator would. When it feels threatened it puffs up, hisses and opens its mouth to flash its blue tongue: this is a bluff display, not random aggression. Let it calm down before trying again. Our guide to taming a blue-tongue skink sets out a step-by-step approach.
Health: the three most common problems
- Obesity: fat rolls at the base of the legs, belly dragging. Cut meal frequency and the share of fatty protein.
- Metabolic bone disease: bent legs, soft jaw, tremors. It results from a lack of UVB or calcium and calls for a visit to a reptile vet.
- Incomplete shedding, especially on the toes: rings of old skin can tighten and damage the digits. A damp corner and a lukewarm soak help; if the skin will not come off, see a vet.
A skink that stops eating, hides outside its usual resting times or has any discharge should see a vet. To plan equipment costs, our article on the first-year budget lists what to expect.
What we checked
- We resolved both DOIs on Crossref and read their abstracts; the vitamin D figures and the description of the wild diet come from them.
- The husbandry figures (lifespan, size, enclosure, temperatures, humidity, substrate, meal frequency, health issues) come from our species attribute database.
- We did not keep or observe a skink for this page; we give no dose of any medicine or supplement.
Frequently asked questions
Why does it show its blue tongue?
It is a bluff display: faced with a threat, it opens its mouth, hisses and flashes its vivid tongue to deter the predator. If it does this often, give it more hides and more quiet.
Does a blue-tongued skink really need UVB?
Yes: in the Godke et al. (2025) study, skinks without UVB had very low vitamin D levels that diet alone did not correct, and UVB exposure raised them sharply.
Can you keep several together?
Not recommended for beginners: adults can fight, and cohabitation is best left to experienced keepers with very large enclosures and a way to separate them.
How long do blue-tongued skinks live?
15 to 20 years when well kept: a long-term commitment to plan for before buying. Browse all our guides on the reptile hub.
Sources
- Godke, A., Rhim, H., Aguilar, M. G., Marrero-Acosta, K., & Mitchell, M. A. (2025). Measuring the rise and fall of plasma 25-hydroxyvitamin D concentrations in blue-tongued skinks (Tiliqua scincoides) following ultraviolet B exposure and withdrawal. Veterinary Sciences, 12(10), 965. doi:10.3390/vetsci12100965
- Shea, G. M. (2006). Diet of two species of bluetongue skink, Tiliqua multifasciata and Tiliqua occipitalis (Squamata: Scincidae). Australian Zoologist, 33(3), 359-368. doi:10.7882/az.2006.009
See it in the Planète Pets shop: Stick-on digital thermometer for aquarium and terrarium glass (€18.90) · the whole shop
This guide is part of Planète Pets’s Reptiles universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.