Reptile profile

Blue-Tongue Lizard (Tiliqua scincoides)

Tiliqua scincoides

Database risk label: LOW
Location: Eastern Australia
Database size: 30-60cm

The Blue-Tongue Lizard in this record is Tiliqua scincoides, a large Australian skink. WildGuardian’s risk label for this animal is LOW. It is a non-venomous lizard, but it is still wildlife: a threatened animal may bite if someone tries to handle it. The practical response is simple—recognise it carefully, leave it space, and treat any skin-breaking bite as a wound rather than as a venom emergency. [3] [4]

What animal does this page cover?

This page is about the species Tiliqua scincoides, not every lizard that may be casually called a “bluey” or “blue-tongue”. The Atlas of Living Australia lists Tiliqua scincoides as an accepted name sourced from the Australian Faunal Directory, and places it in the skink family, Scincidae. It also records T. s. intermedia and T. s. scincoides as subspecies under the species. [1]

Australian institutions use both Eastern Blue-tongue and Common Blue-tongue for T. scincoides. Museums Victoria gives the formal name Tiliqua scincoides (White, 1790) and identifies it as a Scincidae species. [2] That variation in common names is why the scientific name matters on a species page.

Identification: useful features, not a reason to approach

A typical Tiliqua scincoides is a substantial, smooth-scaled, ground-dwelling lizard with a broad head, short legs and a tapering tail. Museums Victoria describes a silvery-grey to brown back with seven to nine irregular dark-brown crossbands; the underside may be white, grey or pale yellow. [2] Victorian wildlife guidance adds a broad triangular head wider than the neck, a dark stripe from the eye toward the neck, and a bright blue tongue that contrasts with a pink mouth. [4]

The tongue is most often noticed when the lizard feels threatened. It can open its mouth, display the vivid tongue, hiss and flatten its body to appear larger. This is a defensive display, not an invitation for closer inspection. [3] [4]

Identification limits

Colour, banding and a blue tongue are helpful clues, but they are not a complete field identification on their own. The Australian Museum notes that blue-tongues from the north of the range can be larger and have a different body pattern from eastern animals. [3] A careful identification uses the full combination of body shape, markings, location and a clear view—without disturbing the animal. If the animal cannot be identified confidently, treat the identification as uncertain rather than trying to obtain a closer look.

Australian range and habitat

For this species, Museums Victoria gives an Australian distribution from south-eastern South Australia through Victoria and eastern New South Wales, across most of Queensland, to the Northern Territory and north-western Western Australia. [2] In New South Wales, the Australian Museum specifically records the Eastern Blue-tongue through much of the state west to about Cobar, including the Sydney coastal plain and lower Blue Mountains. [3]

Within that broad range, T. scincoides occurs in dry sclerophyll forest, open montane woodland, grassland and coastal heathland. [2] It also uses open places with ground cover such as tussocky grass and leaf litter, sheltering beneath objects on the ground including logs and rocks. [3] Victorian guidance notes that common blue-tongues occur across Victoria in settings from coastal heathland and lowlands to mountain forests and interior plains, and are also common in urban areas. [4]

That helps explain why one may appear in a suburban garden as well as in bushland. In Sydney, the NSW Government describes blue-tongue lizards as the largest skink likely to be encountered in gardens, where their diet can include slugs and snails. [5] A garden sighting does not make the animal domestic; it remains native wildlife using available shelter and food.

Daily activity, food and shelter

Blue-tongues are diurnal, meaning they are active during the day. They warm themselves in sunny places, then shelter at night under cover such as leaf litter, debris or large objects on the ground. In colder weather, they are mostly inactive and use shelter until warmer conditions return. [2] [4] The Australian Museum explains that, like other lizards, they rely on environmental warmth rather than generating their own body heat; basking is part of that process. [3]

The species is omnivorous. Recorded foods include insects, snails, carrion, wildflowers, native fruits and berries; strong teeth and jaws can crush snail shells and beetles. [2] The Australian Museum likewise describes a diet of both plant and animal material, with slower-moving prey forming much of the animal component. [3]

A CSIRO-published study of 17 radio-tracked adult T. scincoides in Sydney suburbs found that individuals used several backyards but spent much of their time in a few core areas near shelter sites. The study also found use of dense vegetation corridors between retreats and avoidance of roads. [6] This is useful context for encounters: a blue-tongue seen repeatedly in one area may be using familiar shelter rather than being lost or needing intervention.

Safer encounters around homes, parks and gardens

The lowest-risk encounter is an unhurried one. Keep a respectful distance and allow the lizard a clear opportunity to move away. Do not chase, touch or pick it up. Victorian wildlife guidance says that blue-tongues are not venomous but may bite when handled, and advises people who find one around the home to leave it alone. [4]

A few simple precautions reduce conflict without trying to manage the animal yourself:

Be alert when mowing long grass and when using garden tools. The Australian Museum reports that blue-tongues may hide rather than run from a mower, while Victorian guidance notes injuries from garden digging. [3] [4]
Drive attentively on warm days. Blue-tongues may bask on hot surfaces and can be slow to move; the Victorian fact sheet asks drivers to be alert and careful. [4]
Keep cats and dogs inside or restrained where reptiles may be present. This is one of the NSW Government’s recommendations for protecting garden reptiles. [5]
Avoid relying on snail bait where blue-tongues occur. Both the Australian Museum and Victoria’s wildlife factsheet warn that lizards can be poisoned after eating bait-killed snails or slugs. [3] [4]

If a lizard appears injured, trapped or in immediate danger, avoid handling it and seek advice from an appropriate local wildlife authority or registered wildlife rescue service.

If a blue-tongue bites

Blue-tongue lizards are not venomous. A bite from an adult can nevertheless be painful, may break the skin and can leave a bruise; the Australian Museum advises cleaning the bite site with a mild disinfectant. [3] There is no reason to use snake-bite or venom first-aid procedures for this species.

When skin is broken, treat it as a wound. Healthdirect advises that a wound caused by an animal bite should be assessed by a doctor or nurse within two to six hours. For a minor wound, its general first-aid guidance is to control bleeding with clean pressure, rinse with clean water or saline, and cover with a non-stick dressing where possible. [7] Seek urgent care for severe bleeding, a deep wound, or if the person feels faint, dizzy or confused; call 000 in an emergency. [7] Healthdirect also advises medical review for infection signs such as increasing redness, swelling, heat, pus, fever or worsening pain. [7]

FAQs

Are blue-tongue lizards venomous?

No. The Victorian Government’s fact sheet states that common blue-tongues are not venomous, although they may bite if handled. [4]

Where in Australia might I see Tiliqua scincoides?

The species has a broad documented Australian range from south-eastern South Australia through Victoria and eastern New South Wales, across most of Queensland to the Northern Territory and north-western Western Australia. [2]

Is a blue-tongue lizard active at night?

No. It is diurnal. It is active during the day and commonly shelters at night under ground-level cover. [2] [4]

Why does it stick out its blue tongue?

The bright tongue contrasts with the pink mouth. When threatened, the lizard may display it, hiss and flatten its body in a defensive effort to deter a predator. [3] [4]

What should I do if one is in my garden?

Give it space and leave it alone. Avoid disturbing it with tools or pets, and take care around long grass and warm hard surfaces where it may be difficult to see. [3] [4] [5]

References

Last reviewed: 21 October 2026. This is general information, not a substitute for medical care.