Blue-tongued Skink

Overview

Blue-tongued skinks are ground-dwelling lizards with heavy bodies, tiny legs and a big blue tongue they flash as a warning ³⁵. Captive-bred blue-tongues are docile and easy to handle ¹². They can live up to 30 years ¹.

The two most common pets are the northern and eastern blue-tongues (Tiliqua scincoides intermedia and T. s. scincoides) from Australia. Indonesian types such as the Irian Jaya and New Guinea blue-tongues (T. gigas) are also kept ². Size ranges from about 15 inches for Tanimbar Island skinks to around 24 inches for northerns and up to 30 inches for Merauke skinks ⁴.

Natural history

Blue-tongues come from Australia, New Guinea and Indonesia, in semi-desert, open woodland, scrub and forest edges ¹³⁵. They are active by day, foraging and basking ¹. Unusually for lizards, they give birth to live young ¹.

Enclosure

• Size. At least 36–48 in long × 18–24 in deep × 18–24 in high ². CEX and LafeberVet give a 40–55-gallon tank as a minimum, and say larger is better ¹³.
• Layout. Floor space matters more than height. Add low branches and logs, a snug hide such as a half-log or rock cave, and a humid hide of damp sphagnum to help with shedding ¹².
• Water. A sturdy, hard-to-tip bowl big enough to soak in. Skinks often defecate in it, so change it daily and disinfect it weekly ¹².
• Alone. Blue-tongues do not tolerate other skinks except during mating, so house them singly ².
• Outdoors. In warm weather they can go outdoors, with sun, shade and dry areas, but they dig, so sink the fence about 50 cm (20 in) below ground ¹.

Temperature & lighting

Heat with a basking lamp at one end. An under-tank heater on a thermostat can help, but put a barrier between the skink and the glass, because burrowing skinks can be burned ¹. Use at least two thermometers ¹.

UVB is required: a UVB fluorescent tube about 12 inches from the basking site, with no glass or plastic in between. Replace it every 6 to 9 months, even if it still lights up ¹. Screw-in "full spectrum" bulbs give heat, not UVB ¹.

Humidity

Most pet blue-tongues come from dry habitats. LafeberVet suggests about 30% relative humidity for the northern blue-tongue, with good ventilation ¹³. Give a humid hide either way: low humidity causes poor shedding, which can damage toes ¹.

Substrate

Use aspen, cypress mulch, recycled paper bedding, towels or reptile carpet. Never use pine or cedar ¹². Blue-tongues love to burrow, so pick something non-abrasive ¹.

Diet & supplementation

Blue-tongues are omnivores ¹²³.

• Balance. Roughly 50–60% vegetables and greens, 40% animal protein and up to 10% fruit ¹².
• Greens and vegetables. Collard, turnip and mustard greens, dandelion, squash, peas, carrots and hibiscus flowers ².
• Protein. Feeder insects such as crickets, roaches and earthworms, frozen-thawed feeder rodents, and a high-quality, low-sodium wet dog or cat food ².
• Fruit. Small amounts of berries, mango, papaya, figs or melon ².
• Avoid citrus, avocado, eggplant, rhubarb and high-sodium meats or pet foods ².
• How often. Feed young skinks daily, as much as they will eat. Feed adults once or twice a week, or every one to two days in smaller portions. Blue-tongues become obese readily, so watch their weight ²³.
• Calcium. Dust a non-breeding adult's food with a low-phosphorus calcium supplement about once a week ³.

Handling & temperament

Captive-bred blue-tongues are docile and among the easiest lizards to handle ¹². Wild-caught animals often stay defensive for years, hissing, biting and voiding when handled ². Wash your hands before and after handling ¹: reptiles can carry Salmonella ⁷.

Health

Common issues

• Obesity from overfeeding ².
• Stuck shed and toe damage from low humidity ¹.
• Thermal burns from unprotected heat pads or lamps ¹.
• Metabolic bone disease without UVB and calcium ¹³.

When to see a vet

See an exotic-animal vet for appetite loss lasting more than a week, noisy breathing or stuck shed. Open-mouth breathing, limp or oddly angled limbs, large open wounds or an unresponsive animal are emergencies ⁸.

Breeding overview

Blue-tongues give birth to live young ¹. Males usually have larger, wider heads, but the only reliable way to sex a skink is contrast radiography or endoscopy at a vet ². Keep pairs together only for mating, and separate them if they fight ².

Genetics & morphs

Breeders have selected color morphs, mainly in northern blue-tongues, such as sunglow, flame and high orange ².

Legal & ethics

Tiliqua scincoides has been listed on CITES Appendix III by Australia since 2022 ⁶. Australia has not legally exported blue-tongues for the pet trade in decades. The rare Australian species seen abroad likely trace to smuggled animals, and the pygmy blue-tongue is endangered and legally protected ². Choose captive-bred northern, eastern or Indonesian blue-tongues, and avoid wild-caught imports ².

Sources

1. Blue Tongued Skink Care · Chicago Exotics Animal Hospital
2. Blue Tongue Skink Care · Tree of Life Exotic Pet Medical Center
3. Basic Information Sheet: Northern Blue-Tongued Skink · LafeberVet
4. Blue-Tongued Skink · PetMD
5. Tiliqua scincoides (Common Bluetongue, Eastern Bluetongue, Northern Bluetongue, Eastern Blue-Tongued Lizard) · Animal Diversity Web, University of Michigan
6. CITES listing: Tiliqua scincoides · Species+ (UNEP-WCMC and CITES Secretariat)
7. Salmonella, Feeder Rodents, and Pet Reptiles and Amphibians · U.S. Food and Drug Administration
8. When Should My Reptile See a Veterinarian? · Tree of Life Exotic Pet Medical Center

Last reviewed 2026-10-24 by Novel Fauna. This guide is general husbandry information, not veterinary advice. When an animal is sick, see a veterinarian experienced with exotic animals.

Revision history

1. 2026-10-24 Library: 50 cited care guides, /library/[slug] route, coming-soon cards, SLUGS.txt synced to species.guide_slug 228ce54
2. 2026-10-24 WIP: library guides (lizards) 478b100

Evidence grades: Novel Fauna editorial: source classification, not yet expert-reviewed, 2026-10-25. What the grades mean.

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