Red-Eyed Croc Skink
Scientific Name: Tribolonotus gracilis
Species Name Meaning: Called “crocodile skink” because of its armor-like dorsal scales and ridges that resemble a tiny crocodile, and “red-eye” for the bright orange/red ring around its eye.
Size & Lifespan: 7–10 inches; usually 5–10 years in captivity.
Native Range & Habitat: Found in Papua New Guinea in cool, humid tropical forests. They stay near the forest floor, often hiding under leaf litter, logs, and mossy cover.
Behaviors: Extremely shy, freezes when threatened, and often plays dead. Very secretive and prefers hiding over exploring.
Group or Solitary: Solitary; males will fight if housed together and pairs should only be kept for breeding.
Activity Cycle: Nocturnal.
Appearance: Rough, crocodile-like dorsal plates provide protection; the orange eye ring likely helps with signaling or camouflage in dim forest light.
Fun Facts: They vocalize softly when stressed, can drop their tail, and are known as one of the most “dragon-like” reptiles.
ENCLOSURE
Ideal Size: A single adult does well in a 20-gallon long tank; larger is always better for humidity stability.
Substrate: Moisture-retaining substrate—cypress mulch, sphagnum moss, coconut husk mix; deep layers for burrowing.
Temps & Humidity: Basking 82–85°F, ambient 72–78°F, cool side 70–72°F. They do not tolerate heat well—avoid temps above 85–86°F. Humidity 70–90%.
UVB: Optional but beneficial (low-output 2.0 or 5.0).
Climate Tolerance: Ideal zone is 72–78°F. They can tolerate brief dips to 68°F but will stress above 85°F.
DIET & HYDRATION
Weekly Feeding Schedule:
• 3–4 feedings per week
• 3–6 appropriately sized insects per feeding depending on size/age
Food Options:
Staples: Dubia roaches, crickets, mealworms, small superworms, black soldier fly larvae
Treats: Waxworms, hornworms
No Feed/Toxic: Fireflies, wild-caught insects, anything with bright warning coloration
Hydration: Provide a large shallow water dish—preferably wide enough for soaking. Mist enclosure daily to maintain humidity.
Supplements: Calcium with D3 once a week; multivitamin every other week.
Diet Behaviors: They may refuse food if stressed, exposed, or over-handled; they eat almost exclusively at night.
HEALTH
Common Issues:
• Respiratory infections from low temps
• Skin infections from poor humidity or dirty substrate
• Internal parasites from wild-caught insects
• Stress-related anorexia
Potentially Fatal Risks: Overheating, dehydration, severe RI, and untreated parasitic infections.
HANDLING
Handling Behavior: Very shy, easily stressed, and will freeze, squeak, or try to run. They may “play dead” when frightened.
Stress Risk: High—this species does not enjoy handling and prolonged handling can lead to refusal to eat.
How to Handle: Scoop gently from underneath; never grab from above. Keep handling brief and low to the ground.
Show Suitability: Not recommended for shows. They stress easily, are not handleable for kids, and may refuse food for days after handling.
Show Requirements Check:
• Friendly & handleable by anyone — NO
• Not messy — YES
• Can do 5+ shows a day — NO
• Can be boxed up for a day — NO (high stress)
• Good with heat — NO
Conclusion: Not a show-appropriate species