blue tongue lizard care guide
Blue-tongued skinks, commonly called blue tongue lizards, are popular pet reptiles in Australia. They are generally hardy and easy to handle, but require appropriate housing, nutrition, heating and UVB lighting to remain healthy.
Several species and subspecies of blue-tongued skinks are kept as pets in Australia, including Eastern, Northern, Blotched, Centralian and Western blue tongues. In the wild, these skinks inhabit a range of environments, from cooler temperate regions to tropical savannahs and arid areas. As a result, their temperature, humidity and enclosure requirements can differ significantly.
This care guide provides a general overview of blue tongue lizard husbandry, with species-specific recommendations where appropriate. Understanding the natural habitat of your particular species is important for providing suitable care throughout its life.
| Blue-Tongued Skink Facts | |
|---|---|
| Scientific name | Tiliqua spp. |
| Lifespan | 15–20 years on average, up to 30+ in some cases |
| Adult size | Approximately 40–60 cm, depending on species |
| Diet | Omnivorous |
| Activity | Diurnal |
| Housing | Solitary |
| Enclosure | At least 120 × 60 × 60 cm for most adults; larger preferred |
| UVB | 6-12% UVB, depending on enclosure setup |
| Health checks | Every 6 months |
Enclosure Setup
Enclosure Size & Furnishings
Blue-tongued skinks are primarily ground-dwelling reptiles that spend much of their time exploring, basking and hiding. In the wild, they inhabit a variety of environments, including woodlands, grasslands, scrubland and rocky areas, where they shelter beneath logs, rocks and vegetation. Their enclosure should reflect these natural behaviours by providing plenty of floor space, suitable hiding places, opportunities to explore and a range of environmental conditions.
An adult blue tongue should have an enclosure measuring at least 120 cm long × 60 cm wide × 60 cm high, although larger enclosures are strongly recommended. Floor space is particularly important.
A suitable enclosure should include:
- Hiding places: At least two secure hides, positioned at the warm and cool ends. Hollow logs, PVC tubing, fake rock hides, and paper towel or toilet rolls are all great options.
- Basking area: A stable, flat rock or other suitable surface beneath an overhead heat source. The abrasive surface of rocks can also aid in shedding.
- Enrichment: Logs, tunnels, leaf litter and low climbing structures to encourage exploration.
- Water: A sturdy, shallow bowl containing fresh water at all times. Water bowls should be located at the cool end of the enclosure.
- Ventilation: Good airflow to prevent excessive moisture and poor air quality.
Avoid unstable rock structures, sharp decorations and substrates that are excessively dusty or easily ingested. All furnishings should be securely positioned to prevent injury.
Blue tongues are generally solitary and should be housed individually. Keeping multiple skinks together can result in territorial aggression, stress and serious injuries.
Substrate
Blue-tongued skinks naturally spend much of their time exploring, digging and sheltering beneath soil, rocks and leaf litter. Their substrate should encourage these behaviours while being safe, easy to maintain and appropriate for their species’ humidity requirements.
Particulate substrates such as soil, sand, peat, reptile-safe bark, aspen snake bedding, hemp bedding and leaf litter provide opportunities for digging, burrowing and exploring. Soil mixed with leaf litter is suitable for many species, while sand may be incorporated for skinks from drier environments. Peat and bark help retain moisture, whereas aspen and hemp bedding offer lightweight alternatives. Recycled paper cat litter, such as Breeder’s Choice, is another absorbent option, although it provides fewer opportunities for natural digging. Vermiculite is better suited to humid hides or substrate mixes rather than use as the primary substrate.
Although particulate substrates encourage natural behaviours, they can be more difficult to keep clean, as droppings, uneaten food and other waste may become buried or mixed throughout the substrate. Some materials also retain considerable moisture, increasing the risk of mould and bacterial growth if poorly maintained. Choose a substrate appropriate for your skink’s humidity requirements, avoid excessively damp or dusty conditions, and replace soiled material regularly. Avoid calcium-based sands, chemically treated materials and clumping cat litter.
Newspaper, butcher’s paper and paper towel are inexpensive, hygienic options, particularly useful during quarantine, illness or when monitoring droppings. However, they do not allow digging or burrowing. Reptile carpet is reusable and easy to remove for cleaning, but similarly restricts natural behaviours. It can also trap bacteria and debris, while loose fibres may catch claws.
When using loose substrates, offering food on a shallow dish or feeding tile can help reduce accidental ingestion.
Discussing the advantages and disadvantages of different substrates with a reptile veterinarian can help you choose the most suitable option for your blue tongue’s species, individual needs and enclosure conditions.
Temperature & Heating
Blue-tongued skinks are ectothermic, meaning they rely on external heat sources to regulate their body temperature. Correct heating is essential for digestion, immune function and normal activity.
Each reptile species has a Preferred Optimal Temperature Zone (POTZ), which describes the range of body temperatures it naturally seeks to maintain through behavioural thermoregulation, such as basking or moving into cooler areas.
Although many blue tongues maintain an active body temperature of approximately 30–35°C, their preferred environmental conditions vary between species:
| Species | Basking surface |
Cool end |
Night | Humidity |
|---|---|---|---|---|
| Eastern | 35–42°C | 22–26°C | 18–22°C | 40–60% |
| Northern | 35–42°C | 24–28°C | 20–24°C | 40–60% |
| Blotched | 32–38°C | 20–24°C | 16–20°C | 40–50% |
| Centralian | 35–40°C | 20–25°C | 18–22°C | 20–40% |
| Western | 35–40°C | 20–25°C | 18–22°C | 20–40% |
A suitable temperature gradient allows your skink to move between warmer and cooler areas throughout the day.
Use overhead heat lamps to provide a basking area, with all heating equipment appropriately controlled and monitored. Always use a thermostat with heat mats, electric heat rocks and other heating equipment to regulate temperatures and prevent overheating. Without appropriate temperature control, these devices can cause serious thermal burns. Your skink must always be able to move away from the heat source.
Digital thermometers should be used to measure ambient temperatures, while an infrared thermometer is useful for checking basking surface temperatures.
Most Australian blue tongues tolerate an overnight temperature reduction, commonly to approximately 18–24°C, provided they can warm up appropriately during the day. Tropical species may require warmer overnight conditions.
In areas with cold winters, additional night-time heating may be necessary if enclosure temperatures fall below 18°C, particularly for tropical species such as Northern blue tongues. We recommend using a thermostat-controlled, non-light-emitting infrared heat globe, such as the Eco Tech Reptile Spiral Pro Heat Emitter, to maintain appropriate overnight temperatures without disrupting the natural day–night light cycle.
UVB Lighting
UVB lighting is an essential part of good blue tongue husbandry. Exposure to appropriate UVB allows reptiles to produce vitamin D3, which is needed for calcium absorption and healthy bone development.
Without sufficient UVB or dietary vitamin D3, skinks may develop nutritional secondary hyperparathyroidism, commonly called metabolic bone disease (MBD).
For indoor enclosures:
- Provide a high-quality reptile-specific linear UVB tube, preferably a T5 system.
- Position the UVB source over the basking area, creating a UV gradient across the enclosure. A great resource which explains the best UVB setup for each species is Arcadia’s Lighting Guide.
- Aim for an appropriate basking UV Index, generally around Ferguson Zone 2–3 for Eastern blue tongues, with shaded areas offering substantially lower exposure.
- Provide approximately 10–12 hours of light daily, adjusted seasonally if appropriate.
- UVB bulbs gradually lose their effectiveness, even when they continue producing visible light. Replace UVB lighting every 6–12 months according to the manufacturer’s recommendations, or monitor UV output using a suitable UV Index meter.
UVB intensity depends on the bulb, reflector, distance and whether mesh is present (as this can filter out up to 80% of UVB rays). A UV meter is the most reliable way to confirm appropriate exposure.
Excessive UVB exposure can also be harmful, potentially causing eye inflammation (photokeratoconjunctivitis), skin damage and other health problems. UVB lamps should never be positioned too close to your reptile, as exposure increases significantly at shorter distances. Always follow the manufacturer’s recommended mounting distances and provide shaded areas where your blue tongue can escape UV exposure.
UVB cannot pass effectively through glass or plastic. Placing an enclosure near a sunny window does not replace suitable UVB lighting.
While artificial UVB lighting is important for indoor reptiles, it cannot fully replicate natural sunlight. Where weather permits, we recommend providing blue-tongued skinks with 30–60 minutes of supervised outdoor sunlight, 2–3 times per week, with more frequent access where practical. Outdoor basking should take place in a secure, escape-proof enclosure with direct, unfiltered sunlight, ample shade and a sheltered retreat to prevent overheating. The enclosure must also protect your skink from predators, including birds, cats and dogs. Avoid extreme temperatures, particularly hot midday conditions, and never leave your skink unattended outdoors. Always ensure your skink can move freely between sun and shade, rather than being forced to remain in direct sunlight.
Humidity & Shedding
Humidity requirements vary between blue-tongued skink species, reflecting their different natural habitats. Eastern blue tongues generally require moderate humidity of approximately 40–60%, while other species may prefer drier or more humid conditions. Maintaining appropriate humidity supports hydration, skin health and normal shedding. Excessive moisture and poor ventilation can contribute to skin and respiratory problems.
Unlike snakes, blue tongues typically shed their skin in patches rather than one complete piece. Juveniles generally shed more frequently than adults due to their faster growth rate. During shedding, skinks may become less active, eat less or spend more time hiding.
Provide a suitable substrate and a humid hide to assist with shedding, without keeping the entire enclosure constantly damp. Monitor humidity using a digital hygrometer, ideally positioned near substrate level at the cool end.
Retained shed (dysecdysis) occurs when old skin fails to separate and shed completely. Inadequate humidity is a common contributing factor, as insufficient moisture can cause old skin to dry out and adhere to the underlying skin. Dehydration, poor nutrition and underlying health conditions may also contribute.
Retained shed commonly affects the toes, tail tip and occasionally the areas around the eyes. Layers of old skin can accumulate around the toes and tail, forming constricting bands that restrict circulation. If left untreated, this can cause swelling, tissue damage and potentially loss of digits or the tail tip.
Check your skink after each shed, paying particular attention to these areas. Persistent retained skin should be assessed by a reptile veterinarian to prevent complications.
Diet & Nutrition
Blue-tongued skinks are omnivores, meaning they eat both animal and plant material. In the wild, their diet includes insects, snails, vegetation, flowers and seasonal fruits.
In captivity, a varied diet is important for providing appropriate protein, calcium, vitamins and fibre. The balance of plant and animal-based foods should reflect your blue tongue’s age and stage of development.
| Dietary Component | Adults | Juveniles |
|---|---|---|
| Vegetables and leafy greens | 50–60% | 30–40% |
| Animal-based foods | 40–50% | 60–70% |
| Fruit | Occasional treat | Occasional treat |
Juveniles have higher protein and calcium requirements to support rapid growth and skeletal development. As they mature, their diet should gradually transition towards a greater proportion of vegetables and leafy greens. Offering a variety of suitable foods from an early age also helps prevent selective feeding and encourages balanced nutrition.
Vegetables & Greens
Offer a rotating selection of vegetables to provide a variety of nutrients, including:
- Bok choy and other suitable Asian greens
- Endive, chicory and dandelion greens
- Mustard greens and collard greens
- Rocket
- Cos lettuce
- Kale (in moderation)
- Pumpkin and butternut squash
- Green beans
- Zucchini
- Capsicum
- Carrot
Dark leafy greens and colourful vegetables provide important vitamins, minerals and fibre, including beta-carotene, which can be converted into vitamin A. Firmer vegetables such as carrot, pumpkin, squash and zucchini can be finely chopped or grated to make them easier to consume.
Avoid relying on nutritionally poor vegetables such as iceberg lettuce. Spinach and beetroot leaves should be limited because their high oxalate content can bind calcium and reduce absorption.
Animal Protein
Suitable protein sources include:
- Gut-loaded crickets
- Wood cockroaches
- Silkworms
- Earthworms from safe, pesticide-free sources
- Captive-bred snails from safe sources
- Occasional cooked egg
- Occasional pinky mouse
Commercial dog food: Although commonly fed to blue-tongued skinks, dog food is formulated for canine rather than reptile nutritional requirements and should not be relied upon as a staple. If offered, choose a high-quality, meat-based wet food without excessive fillers. Regular feeding of soft, processed foods may also contribute to plaque accumulation and periodontal disease.
Avoid feeding wild-caught insects or snails from areas where pesticides, snail baits or other chemicals may have been used.
Feeder insects should be gut-loaded before being offered to your blue tongue. This involves feeding the insects a nutritious, balanced diet for 12–24 hours before feeding them to your skink, helping to improve their nutritional value.
Insects can sometimes be difficult to source from pet shops, so we recommend checking out Bio Supplies if looking to purchase online.
Fruit & Treats
Small amounts of fruit can be offered occasionally, including blueberries, strawberries, apple, pear and melon.
Fruit should only be offered occasionally as a treat. Its high sugar content can contribute to dental disease, particularly when soft, sugary foods remain around the teeth and gums. Blue tongue skinks are susceptible to periodontal disease, which can lead to inflammation, infection and tooth loss. Offer small amounts of fruit rather than making it a regular part of the diet.
Commercial Reptile Diets
Commercial blue tongue skink pellets can be offered as part of a varied diet, provided they are specifically formulated for omnivorous reptiles. Choose a reputable product with appropriate calcium and vitamin supplementation, and avoid relying on pellets as the sole food source. Fresh vegetables, leafy greens and suitable animal proteins should remain important components of the diet.
Feeding Frequency
Juvenile blue-tongued skinks should be fed daily to every second day, while adults generally require feeding 2–3 times per week.
Feeding frequency and portion sizes should be adjusted according to age, body condition, activity levels and seasonal changes.
Offer food after your skink has had time to warm up under its basking light. Remove uneaten fresh food after several hours to minimise bacterial growth and contamination.
Calcium & D3 Supplementation
Calcium and vitamin D3 are particularly important for maintaining healthy bones, muscle function and normal growth.
Blue-tongued skinks require an appropriate dietary calcium-to-phosphorus balance. Insects and some other commonly fed foods contain relatively little calcium, making supplementation useful.
A general supplementation guide is:
| Supplement | General Recommendation |
|---|---|
| Calcium without D3 | Lightly dust food 2–3 times weekly |
| Reptile multivitamin | Lightly dust food once weekly |
Supplementation requirements vary depending on age, diet, UVB exposure and the products used. Growing juveniles, breeding females and skinks with nutritional deficiencies may have different needs.
Vitamin D3 is essential for calcium absorption and healthy bone development. Blue-tongued skinks produce vitamin D3 through appropriate UVB exposure, although dietary supplementation may be necessary in some circumstances. We recommend calcium without added vitamin D3 for routine supplementation to reduce the risk of excessive intake.
Additional vitamin D3 should be considered based on the skink’s diet, UVB exposure and individual requirements. Always check whether multivitamins or commercial diets already contain vitamin D3, as excessive supplementation can cause toxicity and abnormal calcium deposition in soft tissues.
Brumation
Brumation is a natural period of reduced activity and metabolism that occurs in many reptiles during the cooler months. In the wild, blue-tongued skinks respond to falling temperatures, shorter daylight hours and seasonal changes in food availability by becoming less active and conserving energy.
Even in captivity, some blue tongues may enter brumation despite having access to regular heating and food. During this time, they may spend extended periods hiding or burrowing, become noticeably less responsive and stop eating for several weeks. Drinking and defecation may also become infrequent.
Healthy adult blue tongues can generally tolerate brumation, but juveniles under 12 months of age, underweight skinks and those with underlying health conditions should not be encouraged to brumate. A veterinary health check before the cooler months is recommended to assess body condition and identify any potential health concerns.
Brumation should not be confused with illness. Persistent lethargy, reduced appetite and inactivity can also indicate disease, particularly when enclosure temperatures are inappropriate. If your blue tongue is losing weight, appears weak or shows other signs of illness, arrange a veterinary examination rather than assuming it is brumating.
Gender Determination (Sexing)
Determining the sex of a blue-tongued skink can be challenging, as males and females often look very similar. Although differences in head size, body shape and tail proportions may provide clues, these characteristics are not reliable enough to confirm sex.
Contrast radiography is one of the most reliable methods of sex determination in blue-tongued skinks. This involves introducing a small amount of contrast medium into the hemipenal pockets near the base of the tail, followed by X-rays to assess the presence and structure of these pockets. The procedure allows male and female anatomy to be distinguished without relying on external appearance.
Ultrasound may also be used to identify reproductive organs, including ovaries, developing follicles or testes. However, thick scales and gas within the gastrointestinal tract can make these structures difficult to visualise, limiting its reliability.
If you need to confirm your blue tongue’s sex, a reptile veterinarian can advise on the most appropriate method.
Handling & Behaviour
Blue tongues are generally tolerant of gentle handling, particularly when accustomed to people from a young age.
When handling your skink:
- Support its entire body, including the abdomen and hindquarters.
- Avoid grabbing or restraining the tail, as they may drop their tail as a defense mechanism.
- Keep handling sessions short initially.
- Allow the skink to retreat if it becomes stressed.
- Wash your hands after handling your reptile or cleaning its enclosure.
Hissing, flattening the body and displaying the bright blue tongue are defensive behaviours. Give your skink space if it shows these signs.
Blue tongues may also become less active and eat less during cooler months. This seasonal reduction in activity is known as brumation.
However, loss of appetite or lethargy should not automatically be attributed to brumation, particularly if accompanied by weight loss or other signs of illness.
Common Health Problems
Although blue tongues are relatively robust reptiles, inappropriate husbandry can contribute to several health conditions.
Metabolic Bone Disease (MBD)
Metabolic bone disease is commonly associated with inadequate calcium, vitamin D3 or UVB exposure.
Signs may include weakness, tremors, abnormal limb positioning, jaw softening, spinal deformities and fractures.
Early diagnosis is important to prevent permanent skeletal damage.
Retained Shed (Dysecdysis)
Retained skin commonly affects the toes and tail tip. It may result from inadequate humidity, dehydration or other underlying health problems.
If retained skin constricts circulation, tissue damage and loss of digits can occur.
Respiratory Infections
Respiratory disease may develop in association with inappropriate temperatures, poor ventilation or infectious agents.
Signs include nasal discharge, abnormal breathing sounds, lethargy and open-mouth breathing.
Breathing difficulties require prompt veterinary attention.
Mouth Infections (Stomatitis)
Stomatitis is inflammation or infection of the mouth and gums.
Affected skinks may develop swelling, redness, oral discharge, difficulty eating or reduced appetite.
Parasites
Blue tongues can be affected by internal parasites and external parasites such as mites.
Signs may include weight loss, diarrhoea, abnormal droppings, skin irritation or reduced activity.
Faecal testing can help identify internal parasites and determine whether treatment is required.
Obesity & Nutritional Imbalances
Overfeeding, excessive treats and inappropriate diets can contribute to obesity and nutritional deficiencies.
Monitor your skink’s body condition and weight regularly, rather than relying on appetite alone.
When Should Your Blue Tongue See a Vet?
Reptiles often conceal signs of illness, meaning health problems may be advanced before obvious symptoms develop.
Arrange a veterinary examination if your blue tongue develops:
- Persistent loss of appetite or unexplained weight loss
- Weakness, tremors or difficulty walking
- Swelling of the limbs, jaw or abdomen
- Nasal discharge or abnormal breathing
- Persistent retained shed
- Changes in droppings or difficulty passing faeces
- Mouth swelling or discharge
- Wounds, burns or other injuries
We recommend veterinary health checks every six months for pet blue-tongued skinks. These appointments provide an opportunity to assess body condition, nutrition, enclosure conditions and any developing health concerns.
Blue Tongue Veterinary Care in Sydney
Providing the right diet and environment is essential for keeping your blue tongue healthy, but regular veterinary care is equally important.
At The Wild Vet in Glebe, we recommend six-monthly health checks and provide veterinary care for blue-tongued skinks, including nutritional advice, diagnostic testing and treatment of illness.
Whether your blue tongue is due for a routine health check or showing signs of illness, our team is here to help. Book an appointment, or call 1300 WILD VET (1300 945 383)