Chapter 1 of 9 · Blue-Tongued Skink Care Guide
Start Here: Is a Blue-Tongued Skink Right for You?
Disclaimer: I'm not a veterinarian and I don't hold a degree in animal science or animal care. This guide is compiled from the published sources listed in every chapter. For a sick animal, a reptile vet is the authority.
The short version
- Blue-tongued skinks are calm, curious, heavy-bodied lizards that live 15 to 20 years, with records past 30 [1][4].
- You will see two groups: Australian (mostly the Northern) and Indonesian. They need different heat and humidity, so know which one you have [2][5].
- An adult needs a big floor, at least 4 x 2 x 2 ft (120 x 60 x 60 cm), plus a hot basking spot, UVB and deep substrate to dig in [6][7].
- They eat a mix of protein and plants, and adults only eat once or twice a week [10].
- One skink per enclosure, always. They fight, even as babies [3][6].
Is this the right pet for you?
Blue tongues are great "personality" lizards. A captive-bred Northern is usually very tame and curious, and it does not need live insects every day the way many lizards do. They are also a long commitment, and an adult setup takes real floor space in your home.
A blue tongue is a good fit if you:
- want a lizard you can handle regularly once it settles in
- have space for an enclosure 4 ft (120 cm) long or bigger, ideally 6 ft (180 cm)
- are fine feeding a mix of insects, other proteins and chopped vegetables
- can keep one animal alone for its whole life
It may not be the right pet if anyone in your home is under 5, 65 or older, or has a weakened immune system, because reptiles can carry Salmonella [15]. Wash your hands with soap and water after touching your skink, its enclosure or anything in it. The CDC says children under 5 should not touch reptiles, and reptiles are not recommended for homes with children under 5, adults 65 and older, or people with weakened immune systems [33]. It also advises families expecting a baby to move pet reptiles out of the home before the baby arrives [15].
Australian vs Indonesian at a glance
Australian group. The Northern (Tiliqua scincoides intermedia) is the most popular pet blue tongue and the easiest Australian type to find in the US. It is the largest and heaviest blue tongue and very tame after many generations of captive breeding. The Eastern (T. s. scincoides) is similar but seen far less often in the US [2].
Indonesian group. Classic Indonesian and Halmahera (T. gigas gigas), Merauke (T. g. evanescens), Kei Island (T. g. keyensis), Tanimbar (T. s. chimaera) and Irian Jaya (Tiliqua sp.). Most are wild-caught or farm-bred imports. Temperament ranges from calm (Merauke) to feisty (Tanimbar), and wild-caught animals may never fully settle [2][11].
Quick numbers
| Item | Australian (Northern/Eastern) | Indonesian group |
|---|---|---|
| Adult length | 18–24 in (45–60 cm); Northern is the heaviest [2] | about 18 in (45 cm) typical; Merauke is the longest-bodied [2][5] |
| Lifespan | 15–20 years typical; 20–30+ recorded [3][4] | same |
| Enclosure (one adult) | 4 x 2 x 2 ft (120 x 60 x 60 cm) is the common minimum; ReptiFiles now says 12 sq ft (1.1 sq m), such as 6 x 2 ft [6] | same |
| Basking surface | 105–115°F (40–46°C) [7] | 100–105°F (38–40°C) [7] |
| Cool side | 70–85°F (21–29°C) [7] | 75–85°F (24–29°C) [7] |
| Night low | 65–75°F (18–24°C) [7] | 70–75°F (21–24°C) [7] |
| Humidity | 40–60% [7] | 60–80% [7][8]; one rescue guide keeps Halmahera at 80–100%, while ReptiFiles now groups it with the others at 60–80% [7][8] |
| UVB | T5 HO 10–12% tube, UVI 3–4 at the basking spot, replaced yearly [7] | same |
| Substrate | 4–6 in (10–15 cm) of soil/sand mix [7][9] | 4–6 in (10–15 cm) of moisture-holding soil/coir mix [7][9] |
| Diet | Under 12 months: 70–80% protein. Adults: 50–60% protein, the rest greens and veg, fruit 10% or less [10] | same ratios; some sources push adults more plant-heavy [8] |
| Feeding schedule | babies daily; 3–8 months 3x a week; adults 1–2x a week [10] | same |
| Housing with others | never [3][6] | never |
Warning signs to know from day one
See a reptile vet if you notice any of these [13][14][8]:
- a soft or rubbery jaw, tremors, or swollen limbs (metabolic bone disease)
- bubbles at the nose or open-mouth breathing (respiratory infection)
- weight loss with very smelly stool or diarrhea (parasites)
- dark, tight rings of old shed on the toes
Always wash your hands with soap and water after touching your skink, its enclosure or anything in it [33]. For a longer general overview, the ReptiFiles care guide is a good companion read [1].