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Red-eyed crocodile skink (Tribolonotus gracilis)

Red-eyed crocodile skink (Tribolonotus gracilis), typical appearance of the species

Skinks · Difficulty: Intermediate

Key facts and care guidance for Red-eyed crocodile skink (Tribolonotus gracilis) (origin: New Guinea (humid rainforest floors)). Adult size around 17–20 cm (total length, of which about half is tail). Life expectancy 6–12 years, up to 15. The values below are carefully researched guidance.

Short answers

Red-eyed crocodile skink: How big does the enclosure need to be?

From 100 × 50 × 50 cm for one animal or a pair.

Red-eyed crocodile skink: What temperature does it need?

Daytime 22–26 °C (keep cool!), basking spot ~27–28 °C (only a slight hot spot), at night 18–20 °C.

Red-eyed crocodile skink: Does it need UVB lighting?

UVB: Recommended (low).

Red-eyed crocodile skink: How long do they live?

Life expectancy: 6–12 years, up to 15.

Red-eyed crocodile skink: Is it suitable for beginners?

Rather not – it is considered an intermediate species (difficulty: Intermediate).

Climate

Daytime temperature
22–26 °C (keep cool!)
Night temperature
18–20 °C
Basking spot
~27–28 °C (only a slight hot spot)
Humidity
70–90 %
UVB
Recommended (low)

Enclosure

Minimum size
from 100 × 50 × 50 cm for one animal or a pair
Substrate
A damp coco, peat and soil mix, plenty of hides, a water section

Feeding

Food
Insects (crickets, worms, isopods), small snails
Feeding interval
2–3×/week

Key facts

Adult size
17–20 cm (total length, of which about half is tail)
Life expectancy
6–12 years, up to 15
Origin
New Guinea (humid rainforest floors)
Protection status
Protected: EU Annex D - proof of origin required at purchase and resale.
Brumation
None
Cohabitation
Pairs only (1.1); several animals of the same sex are very aggressive. The reason: several males fight over territory and the basking spot until one is injured or permanently sits in a corner. Two females do not get along long-term either; even in large enclosures this leads to serious, sometimes fatal biting. The pair needs separate warm spots and hides for each animal.

Notes

Keep it cool and very humid – no high temperatures! Shy; it needs plenty of hides and a water basin (it bathes and swims). The males do not get on with each other.

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Related species

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What you need to start

To keep Red-eyed crocodile skink (Tribolonotus gracilis) you typically need: a suitable enclosure (from 100 × 50 × 50 cm for one animal or a pair), substrate (A damp coco, peat and soil mix, plenty of hides, a water section), a heat source with a thermostat, UVB lighting, thermometer and hygrometer, a water dish and hides. You will find equipment in the Reptoria marketplace.

The complete, interactive care database is in the Reptoria app.

Last updated: 9 October 2026 · Editor: Reptoria editorial team · Sources include: Wikipedia DE, cites.application.developpement-durable.gouv.fr, eur-lex.europa.eu, reptifiles.com, swissreptile.ch

All values are non-binding guidance and do not replace expert advice. Research thoroughly from several sources before acquiring and keeping an animal, and observe the applicable law (species and animal protection in particular).