Leachianus Gecko Care Sheet: A Guide for Intermediate Keepers

by Jan 21, 2025

Leachianus Gecko Care Sheet: A Guide for Intermediate Keepers banner with the words leachhie gecko in the bottom right corner

Leachianus geckos (Rhacodactylus leachianus), also known as giant geckos or “leachies,” are the largest living gecko species and are native to New Caledonia. With their impressive size, engaging personalities, and unique care requirements, they make rewarding pets for intermediate reptile keepers. Here’s everything you need to know to care for these fascinating reptiles.

Leachie gecko on the left looking to the right on a rock

Basic Information

  • Common Name: Leachianus Gecko, Giant Gecko
  • Scientific Name: Rhacodactylus leachianus
  • Lifespan: 15-20 years in captivity
  • Size: 10-17 inches, depending on locality
  • Temperament: Docile but territorial; some individuals may be defensive

Housing

Enclosure

  • Tank Size:
    • Juveniles: 12x12x18 inches.
    • Adults: Minimum 24x18x24 inches, though larger enclosures (36x18x36) are ideal for enrichment.
  • Material: Glass or PVC enclosures with a secure mesh top for ventilation.
  • Orientation: Vertical setup to support their arboreal lifestyle.

Substrate

  • Options: Coconut fiber, cypress mulch, or bioactive soil.
  • Depth: 2-3 inches to retain humidity.
  • Avoid: Loose substrates like sand that can cause impaction.

Enrichment

  • Climbing Structures: Provide branches, cork bark, and vines for climbing.
  • Hides: Include multiple hides at different heights for security.
  • Plants: Use live or artificial non-toxic plants for cover and aesthetics.

Temperature and Humidity

leachie gecko temperature and humidity gradient infographic

Temperature

  • Daytime Gradient: 75-80°F on the warm side and 70-75°F on the cool side.
  • Nighttime: Can drop to 65-70°F.
  • Monitoring: Use a digital thermometer to ensure stable temperatures.

Humidity

  • Ideal Range: 60-80%, with spikes up to 90% after misting.
  • Support: Mist the enclosure 1-2 times daily and provide a shallow water dish.
  • Hygrometer: Use a digital hygrometer for accuracy.

Lighting

  • UVB Lighting: Optional but beneficial for overall health and calcium metabolism.
  • Light Cycle: 12-hour light and 12-hour dark cycle to mimic natural conditions.
  • Shade: Provide shaded areas for geckos to retreat if lighting is used.

Diet and Feeding

Staple Diet

  • Commercial Diets: High-quality powdered gecko diets (e.g., Pangea, Repashy) mixed with water.
  • Insects: Offer gut-loaded and calcium-dusted insects like crickets, dubia roaches, or waxworms as occasional treats.
  • Fruits: Small amounts of mashed fruits like mango or papaya can be provided sparingly.
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Feeding Schedule

  • Juveniles: Feed daily.
  • Adults: Feed 3-4 times per week.

Handling and Temperment

  • Temperament: Leachianus geckos can be territorial and defensive, especially as adults. Individual personalities vary.
  • Handling Tips:
    • Handle them gently and infrequently to reduce stress.
    • Allow new geckos to acclimate to their enclosure before attempting interaction.
    • Juveniles are often jumpier, while adults may be more relaxed but territorial.
up close leachie eye
Common Issues
  • Calcium Deficiency: Prevent with proper diet and UVB exposure.
  • Respiratory Infections: Caused by low temperatures or excessive humidity.
  • Shedding Problems: Ensure proper humidity and provide a moist hide.
Signs of a Healthy Gecko
  • Bright, alert eyes
  • Active climbing behavior
  • Consistent appetite and regular feeding
  • Smooth, complete shedding
Cleaning and Maintenance
  • Daily: Spot clean for waste and uneaten food.
  • Weekly: Clean water dishes and spot clean substrate.
  • Monthly: Deep clean the enclosure and replace substrate as needed.

Fun Facts About Leachianus Geckos

  • Largest Gecko: Leachies are the largest gecko species, with some individuals exceeding 17 inches.
  • Territorial Nature: They can be highly territorial, often vocalizing to defend their space.
  • Sticky Feet: Their toe pads allow them to climb smooth surfaces like glass.
  • Locality Variations: Different island localities have distinct sizes, colors, and patterns.
  • Longevity: With proper care, leachianus geckos can live over 20 years, making them a long-term commitment.
leachie gecko on a branch

Leachianus geckos are an incredible addition to any intermediate keeper’s collection. Their size, unique behaviors, and striking appearance make them a standout species. However, they require attentive care, a secure enclosure, and respect for their territorial nature. With proper housing, diet, and enrichment, leachianus geckos can thrive and bring joy for many years.