The New Caledonian Giant Gecko, commonly called the Leachie or Leachianus Gecko (Rhacodactylus leachianus), is the largest living gecko species in the world. Adults can reach 14-17 inches (36-43 cm) and weigh 250-400 grams — the size of a small mammal. These arboreal giants from the islands of New Caledonia are the undisputed royalty of the gecko world, commanding prices that shock newcomers to the reptile hobby.

Why the Astronomical Price Tag?

Extreme Rarity: Leachianus Geckos are found only on New Caledonia, a small island group in the Pacific. Export from New Caledonia has been banned since the 1990s, meaning every Leachie in the pet trade descends from animals exported before the ban. Slow Reproduction: Leachies reach sexual maturity at 3-5 years and produce only 2 eggs per clutch, 2-4 clutches per year — compared to Crested Geckos that can produce 15-20 eggs annually starting at 12-18 months. Locale-Specific Bloodlines: Different island populations (Grande Terre, Pine Island, Moro, Nuu Ana, etc.) have distinct appearances, sizes, and patterns. Dedicated breeders maintain pure locale bloodlines, and crossing locales is controversial — pure locales command premium prices.

Price Tiers

$500-$1,500: Unsexed juveniles without specific locale lineage. $1,500-$4,000: Proven locale-specific juveniles with known parentage. $4,000-$10,000: High-color, high-pattern adults from sought-after locales (Mt. Koghis, Yate, Poindimie). $10,000-$50,000+: Exceptional high-white, melanistic, or aberrant patterned specimens — essentially one-of-a-kind animals.

Care Requirements

Despite their size and price, Leachie care is straightforward for experienced keepers. A single adult requires a minimum 18″×18″×24″ (45×45×60 cm) arboreal enclosure, though larger is better. They eat a diet of commercial Crested Gecko Diet (CGD) supplemented with insects and occasional fruit treats. Temperature range: 72-80°F (22-27°C) — they are sensitive to heat and can die at temperatures above 85°F (29°C). Leachies are pair-bonded and can sometimes be housed as male-female pairs — but both animals must be similar in size, and constant monitoring for aggression is essential.

The Leachie’s vocalization is unique among geckos — they produce a loud, growling bark when threatened that is startlingly loud for a lizard. Combined with their size and prehistoric appearance, a barking Leachie defending its territory is an experience few reptile keepers ever forget.