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LOCUS Scales

Blue-tongue skink

Quick sourced reference values. LOCUS Scales' full breeding/genetics toolset is built specifically for ball pythons — this page is a courtesy reference for other species.

Scientific name
Tiliqua scincoides
Native range
Australia (Northern varieties most common in captivity)
Lifespan
15-20 years (sometimes 30)
Lifestyle
🌍 Terrestrial, burrowing — needs deep substrate to dig in

Diet: Omnivore — roughly 50% protein (insects, thawed prey, a bit of cooked protein), 40% vegetables, 10% fruit. A much more varied diet than the snakes on this list.

Feeding frequency: Juvenile: daily. Adult: every 2-3 days, alternating the protein/veggie/fruit components meal to meal rather than offering everything at once.

Substrate: Deep mix (4-6in minimum) of untreated topsoil + play sand, with leaf litter on top. Bioactive-compatible. Shallow or non-diggable substrate is a real stressor for this species.

UVB: Recommended, 12h/day — roughly Ferguson zone 3, replaced every 6 months.

Incubation: Technically viviparous with placental exchange (not just ovoviviparous like a boa — a nuance rare among reptiles), often described as ovoviviparous for simplicity in mainstream sources. Gestation ~90-120 days.

Clutches per mating: Generally 1 birth per year, seasonal breeding cycle.
Average egg count: 5-25 newborns (average ~10-15), already fully formed and independent at birth.

Warm side
38°C
Cool side
24°C
Humidity
50%

Several subspecies with fairly different humidity needs (Northern Australian varieties: 40-60%; Indonesian varieties: 60-80%) — properly identify the exact subspecies before setting up the enclosure, unlike other, more uniform species on this list.

🏠 Enclosure size — Baby/juvenile: 36×18×18in · Sub-adult: not applicable — moves straight to adult enclosure if eating/drinking well · Adult: 48×24×24in minimum
Source: reptilesencaptivite.com

Common questions

Why does deep substrate matter so much here?
This is a burrowing species — substrate that's too shallow or compacted prevents this natural behavior, causing real chronic stress. Plan for 4-6in minimum, loose all the way through.
Can I keep two together?
No — a solitary species, often aggressive toward its own kind outside of breeding season. Always one animal per enclosure.
Do I really need to feed it vegetables and fruit?
Yes — unlike the snakes on this list, this is a true omnivore. A 100% protein diet leads to long-term deficiencies. Aim for roughly 50% protein, 40% vegetables, 10% fruit, alternating rather than offering everything at once.
Is its blue tongue dangerous?
No, purely defensive — the skink opens its mouth and flashes its bright blue tongue to bluff a potential predator; it doesn't bite and causes no harm. Just a sign it feels threatened, not necessarily a reason to worry.
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General reference content — does not replace veterinary advice.