One of the most spectacular and sought-after species of the Rhacodactylus genus is R. leachianus, with two subspecies that are presently recognized as giant geckos from New Caledonia, a group of islands northeast of Australia. They are Rhacodactylus leachianus leachianus, found on Grande Terre (GT), the largest New Caledonia island, and Rhacodactylus leachianus henkeli, found on Pine Island (Isle of Pines) and other smaller islands.
Mniarogekko chahoua gets its common name from the moss or lichen-like pattern it displays. Colors range from rusty red and brown to green or gray. There has been some notation that color could possibly be a geographic indicator in this species as the geckos from the outer islands most often display the lighter gray patterns. It commonly reaches a snout to vent length (SVL) of 5.5 in (14 cm). It possesses a strong, well-muscled, fully prehensile tail and is not subject to dropping it as readily as some of its relatives.