Reptiles · Skinks
Blue-tongue Skink
Tiliqua scincoides
Curious, tame, blue-tongued ground lizardIntermediate
- Lifespan
- 15-20 years
- Size
- 45-60cm (18-24in)
- Social needs
- Strictly solitary
- Time
- Medium - daily feeding/cleaning
- Cost
- Medium to High
- Diet
- Omnivore - greens, veg, protein
Overview
What is this animal?
- Blue-tongue skinks are large, robust, ground-dwelling lizards named for the bright blue tongue they flash to startle predators.
- They are curious and often become tame, learning to recognise their keepers.
- Several species and subspecies exist, from Australian to Indonesian types, with differing humidity needs.
- Their interactive nature and manageable size make them rewarding pet lizards, though they need more space and dietary care than many people expect.
Temperament
- Blue-tongue skinks are among the more personable lizards, often becoming calm, confident, and tolerant of regular handling.
- Many tolerate exploring outside their enclosure under supervision.
- They may huff, flatten, and show their blue tongue when startled, but rarely bite once tame, though their jaws are strong.
- Patient, consistent handling produces a trusting pet.
- They must always be housed alone, as they are not social.
A good fit for
- Keepers wanting an interactive lizard
- Those who can provide a large enclosure
- People able to prepare varied fresh diets
- Intermediate keepers ready for UVB husbandry
Common mistakes to avoid
- Needs UVB - MBD risk if omitted
- Obesity from too much protein or fat
- Must be housed alone, never paired
- Enclosure size often underestimated
Enclosure
Minimum 7,200 cm² of floor (1,116 sq in) · 120 × 60 × 45 cm
Must be housed alone. Strictly solitary
- An adult needs a floor-based enclosure of at least 120x60x45cm, with larger being better, as these are active terrestrial walkers.
- Provide a substrate deep enough to burrow into, hides, and sturdy decor.
- They need a basking gradient with a hot spot of 35-40C and a cool side of 22-26C, plus UVB lighting across part of the enclosure for vitamin D3 and calcium metabolism.
- Humidity needs vary by species, so match it to your specific type.
Supplies
Setup
- Enclosure
- Heating and thermostat
- UVB fixture and bulb
- Thermometers and hygrometer
- Substrate and decor
Ongoing
- Live crickets, dubia roaches and earthworms
- Dark leafy greens and mixed vegetables (for blue-tongues)
- High-quality wet dog food or plain lean meat for the protein share
- Plain calcium powder without D3
- Vitamin supplement with D3
- Feeder gut-load and a ventilated tub
- Shallow food and water dishes
- Blunt-tipped feeding tongs
Safe substrate: Topsoil and play sand mix · Coco fibre and coir · Cypress mulch
Care routine
Daily
- Check temperatures and humidity
- Fresh water bowl
- Look the animal over
- Spot-clean waste and uneaten food
Weekly
- Feed to this skink's strategyevery 2 days
- Short handling sessionevery 3 days
Monthly
- Turn and dampen part of the substrateevery 2 weeks
- Weigh-inevery 2 weeks
- Check the nails
- Deep-clean the enclosure
- Test thermostats, lamps and guards
Less often
- Refresh the substrateevery 3 months
- Replace the UVB lampevery 6 months
Vet: Annual exam and weight review — every 12 months (every 6 months from 12 years old)
Top resources for more info
Independent creators and organisations we would send a friend to. We have no affiliation with any of them, and nothing here is sponsored. Links checked 2026-09-19.
YouTubers
Reptiles and ResearchEvidence-led husbandry: enclosure size, UVB, thermal gradients, enrichmentClint's ReptilesWhich reptile suits you, with honest care and handling verdictsGoHerpingBeginner reptile care, setup mistakes and welfare basics
Sites
Go deeper
Diet
- Blue-tongues are omnivores needing a varied diet of roughly equal parts greens, vegetables, and quality protein.
- Offer dark leafy greens, mixed veg, and protein such as insects, lean meat, eggs, or a small amount of high-quality dog food, plus occasional fruit.
- Dust food with calcium and use a vitamin supplement as advised.
- Avoid high-fat, all-protein diets that cause obesity and organ stress.
- Juveniles need more protein and frequent feeding; adults eat every two to three days.
Health
- Without correct UVB and calcium, blue-tongues readily develop metabolic bone disease, a common and serious husbandry failure.
- Obesity from rich diets and too little space is also frequent, and respiratory infections occur in cold or incorrectly humid setups.
- Provide proper UVB, a thermal gradient, and a balanced diet to prevent these problems.
- Keep nails trimmed and weight in check, and consult a reptile vet for any limb weakness, swelling, or lethargy.
Is your enclosure big enough?
Minimum floor area7,200 cm² (1,116 sq in) of continuous, unbroken floor
As dimensions120 x 60 x 45 cm
CompanyMust be housed alone. Strictly solitary
Is this urgent?
Most reptile emergencies are husbandry emergencies first. Before you panic, check the temperatures — but check them with a thermometer, not a hand.
Go now
Open-mouth breathing, or bubbles and mucus at the nose or mouthGo now. Raise the warm end to the top of the species range in transit. Respiratory infection in a reptile is usually already established by the time it is visible, and it advances fast at the wrong temperature.
NowProlapse — any tissue protruding from the ventGo now. Keep the tissue moist with clean lukewarm water. Do not push it back in. Exposed tissue dries and dies quickly, and the window for a simple repair is short.
NowGaping, gasping, or unable to right itself when gently turned overGo now. Loss of the righting reflex signals a neurological or metabolic crisis.
NowA burn, or a blackened patch on the belly or sideGo now, and unplug the heat source before you leave. Contact burns from an unregulated mat or an unguarded lamp are among the most common injuries in captive reptiles.
NowToday
Tremors, twitching, jerky limbs, or a rubbery jawCall today. Note your UVB bulb type and when it was last replaced. Almost always a calcium and D3 problem, and almost always a UVB problem underneath that.
TodayRetained shed over the eyes, or a ring of stuck shed on the tail or a toeRaise humidity and offer a damp hide, then call if it is not clear within a day. A constricting ring cuts off circulation and the digit or tail tip is lost.
TodaySudden weight loss, or a visibly sunken or triangular body shapeCall today, with the weight history. A reptile that has lost condition has usually been unwell for a while.
TodaySoon
Refusing food beyond the species' normal fastCheck what a normal fast looks like for this species before worrying — for several snakes it is weeks, not days. Then log it and book if the fast is unusual for this animal. Feeding anxiety drives more unnecessary vet visits than any other reptile question, and also masks the fasts that genuinely matter.
Check the guide firstBefore any non-emergency call, write down the four numbers a vet will ask for: the thermostat probe reading, the warm-end air temperature, the cool-end air temperature, and the hottest accessible surface. Surface temperature can run well above the air above it.
This is general guidance for a healthy adult, not a diagnosis. An exotics vet who knows your animal always overrides it — and the time to find one is before you need one.
Can a blue-tongue skink eat that?
Reptile diets split hard by species. An insectivore and a grazing tortoise share almost nothing, so check the species guide as well as this list.
The full list
Never (15)
AlcoholNo safe amount at any body weight on this site.
neverAvocadoPersin. Fatal to many reptiles.
neverCaffeineCoffee, tea and energy drinks. Cardiac and neurological toxicity at tiny doses for an animal this size.
neverChocolateTheobromine and caffeine. Small mammals and reptiles cannot clear either.
neverCitrusToo acidic, and it interferes with calcium absorption.
neverDog or cat foodProtein and vitamin D levels formulated for a mammal. In tortoises it causes irreversible kidney and shell damage.
neverFirefliesLucibufagins. A single firefly has killed adult lizards. This is the most dangerous item on any reptile list and it is the one keepers do not know about.
neverFish caught from the wildThiaminase and parasite risk for turtles and aquatic species.
neverGarlicSame allium toxicity as onion, and more concentrated by weight.
neverIceberg lettuceWater with no nutrition. It fills a reptile up in place of food that would have done something.
neverLeekAllium family. Same mechanism as onion and garlic.
neverOnionOrganosulphur compounds damage red blood cells. The whole allium family is out.
neverRhubarbOxalate load high enough to cause acute kidney injury.
neverSalty or seasoned human foodSalt, oil and seasoning. Crisps, chips, seasoned leftovers and processed meat are all out.
neverWild-caught insectsPesticide residue and parasites, and the identification risk. Captive-bred feeders only.
neverRare treats (1)
WaxwormsVery fatty. Useful for a underweight animal or for medicating, addictive otherwise. One or two, rarely.
rare treatOccasional (5)
Bell pepperSafe, low oxalate, and the colour gets a refuser eating. A few small pieces a few times a week.
occasionalButternut squashWell tolerated and a useful source of vitamin A precursors. Small cubes a few times a week.
occasionalKaleGood calcium, mild goitrogen. Rotate it. Twice a week.
occasionalMealwormsHard chitin shell and a poor calcium ratio. Fine as part of a varied feed, poor as the whole diet. A few, alongside better feeders.
occasionalSpinachOxalates bind dietary calcium, which is the last thing a reptile at risk of metabolic bone disease needs. A very small amount, rarely.
occasionalEveryday foods (6)
Black soldier fly larvaeUnusually high in calcium; one of the few feeders that does not need dusting. Several per feed.
everyday foodCollard greensOne of the best staple greens for herbivorous and omnivorous reptiles. Daily.
everyday foodCricketsA standard feeder. Gut-load them for 24 hours before offering, or you are feeding an empty shell. Sized no wider than the space between the animal's eyes.
everyday foodDandelion greensExcellent calcium-to-phosphorus ratio and readily taken. Pick away from sprayed ground. Daily, for herbivorous species.
everyday foodDubia roachesBetter calcium ratio and more meat per insect than crickets, and they cannot climb glass. Sized to the animal.
everyday foodMustard greensGood calcium ratio; rotate with other greens. Several times a week.
everyday foodThat food is not on our list. Reptile diets are narrower than they look — check the species guide, and ask an exotics vet before offering anything unfamiliar.
Dust feeders with a calcium supplement to the schedule in the species guide. A reptile can be eating well and still be starving of calcium.
What it really costs
Setup, monthly, first year and across a whole life, itemised and with the electricity worked out from the actual wattage. Published figures for the same animal disagree by a factor of four, so the calculator shows ranges rather than picking one.
Bedding and substrate
Substrate choice follows the animal's natural humidity, not the look of the vivarium. Get that pairing right and most substrate arguments disappear.
Safe
Topsoil and play sand mixThe standard bioactive-ready base for arid and semi-arid species. Plain topsoil with no fertiliser, no perlite, no wetting agents.
safeCoco fibre and coirHolds humidity well for tropical species. Rinse and check it is not bone dry, which makes it dusty.
safeCypress mulchGood humidity retention for tropical snakes. Cypress specifically, not general 'wood mulch'.
safeOrchid barkLong-lasting, holds humidity, resists compaction. Common in tropical vivaria.
safePaper towel or newspaperNot attractive, but correct for quarantine, for a new arrival, and for any animal being monitored for output.
safeLeaf litter over a soil baseCover, humidity and invertebrate habitat in one. Sterilised, from a known source.
safeWith a caveat
Reptile carpetSnags claws and traps bacteria in the fibres. If used, it needs replacing rather than washing, often.
with a caveatSand alone for desert speciesReal desert is packed substrate, not loose play sand. Mix it with soil so it holds a burrow.
with a caveatBioactive setupsExcellent when established, but the clean-up crew needs weeks to establish before the animal goes in.
with a caveatNever
Calcium sand and 'digestible' sandsMarketed as safe to eat, which encourages eating it. Implicated in impaction.
neverCrushed walnut shellSharp fragments, frequently implicated in impaction, with no advantage over soil.
neverPine and cedarSame aromatic phenols as in rodent bedding, and the same airway damage.
neverUncovered heat mats and unguarded ceramic emittersNot a substrate, but the most common cause of contact burns. Every heat source needs a thermostat, and every emitter needs a guard.
neverThis is our general list for reptiles. We have not built one specific to Skinks yet.
Impaction is far more often a temperature problem than a substrate problem: an animal that cannot reach its digestive temperature will not pass what it swallows, whatever it is standing on.
Compare with other animals
The same axes for every animal, side by side — the way the guides are written makes that a fair comparison rather than two articles.
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Skinks, side by side
Same axes, same care guides — the honest way to choose between types.
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