Red-Eyed Crocodile Skink Care Guide
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Red-Eyed Crocodile Skink Care Guide
The Red-Eyed Crocodile Skink (Tribolonotus gracilis) is one of the most visually striking reptiles in the hobby. With their prehistoric, armored appearance and vivid orange eye rings, these small skinks from the rainforests of New Guinea have become increasingly popular among intermediate and advanced keepers. They are not beginner reptiles — they are shy, stress-prone, and have specific humidity and temperature requirements — but for the patient keeper, they are endlessly rewarding to observe.
At Ohio Pet Depot, we carry Red-Eyed Crocodile Skinks and everything you need to set up a proper rainforest vivarium for them. This guide covers everything from enclosure setup to feeding, health, and handling.
Quick Facts
| Category | Details |
|---|---|
| Scientific Name | Tribolonotus gracilis |
| Common Name | Red-Eyed Crocodile Skink, Orange-Eyed Crocodile Skink |
| Adult Size | 8–10 inches total length |
| Lifespan | 10–12+ years in captivity |
| Origin | New Guinea (Indonesia & Papua New Guinea) |
| Habitat | Tropical rainforest floor, near water |
| Activity Level | Crepuscular (most active at dawn and dusk) |
| Temperament | Shy, secretive, stress-sensitive |
| Experience Level | Intermediate to Advanced |
| Vocalization | Yes — will squeak or scream when stressed (rare among lizards) |
Enclosure Setup
Size
A single adult or a pair can be housed in a 18" x 18" x 24" (or larger) front-opening terrarium. Taller enclosures are fine but floor space is more important than height for this ground-dwelling species. A 24" x 18" x 18" is a solid minimum for a pair. Do not house two males together — they will fight.
Substrate
Moisture retention is critical. Use a deep layer (3–4 inches minimum) of a bioactive-friendly substrate that holds humidity well:
- Eco Earth / Coconut Fiber — excellent moisture retention, naturalistic
- ABG mix (coconut fiber + orchid bark + sphagnum moss + charcoal) — ideal for bioactive setups
- Sphagnum moss — layer on top or use as a humid hide substrate
Avoid dry substrates like paper towels, reptile carpet, or sand. These skinks need to burrow and require consistent ground-level humidity.
Hides & Decor
Red-Eyed Crocodile Skinks are extremely secretive. Provide multiple hides — cork bark flats, half logs, and leaf litter are all excellent. A shallow water dish large enough to soak in is essential; these skinks are semi-aquatic and will spend time in standing water. Change the water daily.
Live plants (pothos, bromeliads, ficus) are highly recommended — they help maintain humidity and provide additional cover that reduces stress.
Temperature & Lighting
Temperature
| Zone | Temperature |
|---|---|
| Ambient (cool side) | 72–76°F |
| Ambient (warm side) | 78–82°F |
| Basking spot | 84–86°F (subtle, not intense) |
| Nighttime low | 68–72°F (can drop naturally) |
These are cool-adapted rainforest animals — temperatures above 88°F can be fatal. Never place the enclosure in direct sunlight or near a heat vent. A low-wattage basking bulb or a ceramic heat emitter on a thermostat is the safest approach. The Fluker's Ceramic Clamp Lamp with Dimmer gives you precise control.
UVB Lighting
UVB is beneficial but low-output for this species. A Zoo Med ReptiSun Compact Fluorescent UVB Bulb (5.0) or a low-output T5 HO strip is appropriate. Avoid high-output mercury vapor bulbs like the Powersun — they are too intense for this species. A 10–12 hour light cycle mimicking tropical day length is ideal.
Photoperiod
Maintain a consistent 12-hour light / 12-hour dark cycle year-round. These skinks are crepuscular, so most activity will occur at the edges of the light cycle regardless.
Humidity
Humidity is the single most important environmental parameter for Red-Eyed Crocodile Skinks. Target 80–100% humidity consistently. Low humidity causes shedding problems, respiratory infections, and chronic stress.
- Mist the enclosure once or twice daily — morning and evening mimics natural rainfall patterns
- Keep the substrate damp but not waterlogged — standing water in the substrate causes bacterial growth
- A fogger or misting system on a timer is highly recommended for consistency
- Ensure the enclosure has some ventilation to prevent stagnant, stale air even at high humidity
Feeding
Diet Overview
Red-Eyed Crocodile Skinks are insectivores. They eat a variety of live invertebrates in the wild and should be offered a diverse diet in captivity. Variety is key to long-term health.
Feeder Insects (Staples)
- Banded Crickets — excellent staple, high in protein, stimulates natural hunting behavior
- Dubia Roaches — nutritionally superior staple, low odor, easy to keep
- Mealworms — good variety feeder, offer in moderation due to chitin content
- Nightcrawlers — excellent protein source, highly accepted, great for picky eaters
- Red Worms — smaller worms ideal for juveniles or as variety feeders
Treat Feeders (Occasional)
- Wax Worms — high fat, use sparingly as a treat or appetite stimulant
- Hornworms — high moisture, great for hydration; offer occasionally
- Superworms — good for larger adults; high in fat, limit frequency
- Zoo Med Can O' Grubs (Black Soldier Fly Larvae) — excellent calcium-to-phosphorus ratio, great supplemental feeder
Feeding Schedule
| Age | Frequency | Prey Size |
|---|---|---|
| Juvenile (under 6 months) | Daily | Small crickets, red worms, small dubias |
| Sub-adult (6–18 months) | Every other day | Medium crickets, dubias, nightcrawlers |
| Adult (18+ months) | Every 2–3 days | Full-size crickets, dubias, nightcrawlers, worms |
Prey size rule: Never offer prey larger than the width of the skink's head. These are small lizards — oversized prey causes stress and can lead to regurgitation.
Offer feeders in the evening or at dusk when these crepuscular animals are most active. Place feeders directly in the enclosure or use a shallow dish — tong feeding is often too stressful for this species.
Supplements
Dust feeders with Fluker's Repta Calcium or Zoo Med Repti Calcium at every feeding for juveniles and every other feeding for adults. Use a multivitamin supplement once every 1–2 weeks. Gut-load all feeder insects 24–48 hours before feeding with Fluker's Orange Cube Cricket Diet for maximum nutritional value.
Handling & Temperament
Red-Eyed Crocodile Skinks are not a handling-oriented species. They are shy, secretive, and highly stress-prone. Many individuals will never fully tame down, and that's okay — their appeal is in observation, not interaction.
- Vocalization warning: These skinks are one of the few lizard species that will vocalize when stressed — a sharp squeak or scream. If your skink is vocalizing during handling, put it down immediately.
- Thanatosis (playing dead): Some individuals will go completely limp when picked up. This is a stress response, not a health issue — but it's a clear signal to minimize handling.
- Build trust slowly: Sit near the enclosure, allow the skink to see you regularly, and offer food from tongs or your hand before attempting to pick up.
- Keep sessions short: If you do handle, limit sessions to 5 minutes or less, especially for new animals.
- Never grab from above: Approach from the side and scoop from below — overhead grabs trigger a predator response.
Health & Common Issues
| Issue | Signs | Cause / Action |
|---|---|---|
| Dysecdysis (stuck shed) | Retained skin on toes, eye rings, tail tip | Low humidity; increase misting, provide a humid hide with damp sphagnum moss, soak in shallow warm water |
| Respiratory Infection | Wheezing, mucus, open-mouth breathing | Low humidity or drafts; vet visit required — antibiotics may be needed |
| Metabolic Bone Disease (MBD) | Soft jaw, tremors, lethargy, curved spine | Calcium/UVB deficiency; correct supplementation and lighting immediately, vet visit |
| Parasites | Weight loss, abnormal feces, lethargy | Wild-caught animals especially; fecal exam by a reptile vet recommended for all new animals |
| Stress-related anorexia | Refusal to eat, hiding constantly | Inadequate hides, too much handling, improper temps/humidity; address husbandry first before assuming illness |
| Egg binding (females) | Straining, lethargy, distended abdomen | Females lay single eggs; provide a laying site (damp moss/soil); vet visit if egg is retained |
Quarantine all new animals for a minimum of 60–90 days in a separate enclosure before introducing them to any established collection. A fecal exam by a reptile-experienced vet is strongly recommended for all new acquisitions, especially wild-caught individuals.
Breeding Notes
Red-Eyed Crocodile Skinks are monogamous in the wild and can be kept as established pairs in captivity. Females lay a single egg at a time, which both parents may guard. Incubation takes approximately 65–70 days at 80–82°F. Hatchlings are tiny and should be set up in their own enclosure immediately with appropriately sized feeders (small crickets, red worms).
Shopping List
- 🦎 Red-Eyed Crocodile Skink
- 🦟 Banded Crickets — staple feeder
- 🪲 Dubia Roaches — staple feeder
- 🪱 Nightcrawlers — excellent protein variety
- 🪱 Red Worms — great for juveniles
- 🐛 Mealworms — variety feeder
- 🐛 Hornworms — hydration treat
- 🐛 Wax Worms — occasional treat
- 🐛 Superworms — adult treat feeder
- 🥫 Zoo Med Can O' Grubs (BSFL)
- 🧪 Fluker's Repta Calcium
- 🧪 Zoo Med Repti Calcium
- 🍊 Fluker's Orange Cube Cricket Diet — gut-load
- 💡 Zoo Med ReptiSun Compact UVB Bulb (5.0)
- 🔥 Fluker's Ceramic Heat Emitter
- 💡 Fluker's Ceramic Clamp Lamp with Dimmer
Come Visit Us!
Ready to bring home a Red-Eyed Crocodile Skink? Stop by Ohio Pet Depot to see our current Red-Eyed Crocodile Skinks in person. Our staff can walk you through setup, answer your questions, and help you pick out everything you need for a proper rainforest vivarium. We also carry all the feeder insects, supplements, and lighting listed in this guide — so you can get everything in one trip.
Questions? Call us, stop in, or reach out online. We're here to help you succeed with this incredible species.