Reptile atlas

Geographical Origin and Habitat: Oedura castelnaui is native to the northeastern regions of Australia, particularly concentrated in northern Queensland. It inhabits dry sclerophyll forests, open eucalyptus woodlands, and semi-arid shrublands. This species is strictly arboreal, spending its daylight hours concealed beneath loose tree bark (especially ironbark eucalyptus), in deep rock crevices, or hollow logs, emerging at night to hunt.

Taxonomy and Genetics: Belonging to the family Carphodactylidae and the genus Oedura. The genetics of this species are highly stable, although selective breeding in captivity has produced several distinct color morphs, including albino, hypo, and striped variations. Its genetic makeup reflects evolutionary adaptations to survive significant seasonal temperature shifts in the Australian wild.

Behavior and Habits: Exhibits strictly nocturnal and crepuscular habits. It is a calm, docile gecko that rarely shows defensive aggression or biting tendencies, making it an excellent choice for beginners. Equipped with expanded digital pads featuring specialized adhesive lamellae, it climbs smooth vertical surfaces with ease. Adult males show moderate territorial behavior during the breeding season.

Morphology: Features a robust body with exceptionally soft, velvety skin comprised of tiny, non-overlapping scales. The head is large, distinct from the neck, with prominent eyes lacking movable eyelids. The tail is broad and slightly flattened, acting as a vital fat storage site for periods of food scarcity. Adults reach an average total length of 14-16 centimeters.

Terrarium Setup: An enclosure with vertical orientation measuring at least 45x45x60 cm is required for a single specimen or a pair. Decor should feature vertical climbing branches, slabs of natural cork bark secured against the walls to simulate tree trunks, and hardy live or fake plants. The substrate should be dry forest soil, coco coir, or a sand-peat mix, with a humid hide box always provided.

Lighting and Heating: While nocturnal, a low-output (2-5%) UVB light is highly beneficial for calcium metabolism. Heating must be provided using a thermostat-controlled heat mat or overhead ceramic emitter to create a thermal gradient. The basking zone should reach 30-32°C, with a cool side of 24-26°C. Nighttime temperatures can safely drop to around 20°C.

Humidity and Hydration: Coming from semi-arid regions, ambient humidity should be kept low, around 40-50%. Daily misting of the terrarium at night is required to allow the gecko to drink water droplets from the decor and glass. A shallow water dish containing clean water must be kept in the enclosure at all times, though they primarily drink from misting.

Feeding and Supplementation: Strictly insectivorous. The diet should consist of a variety of live insects, such as size-appropriate crickets, roaches (Dubia or red runners), mealworms, and silkworms. Food insects must be dusted with pure calcium carbonate at almost every feeding for juveniles and breeding females, and calcium with D3 twice a week for adult males.

Compatibility: Male velvet geckos are highly territorial and must never be housed together, as they will fight aggressively, resulting in severe injury or death. A single male can be housed with one or two females in a larger enclosure, or females can be kept together, provided they are monitored for resource guarding or bullying.

Health and Common Diseases: Metabolic Bone Disease (MBD) is the most common health issue, resulting from insufficient calcium or D3 intake. Symptoms include shaky limbs and soft jaws. Stuck shed, particularly on the toes and tail tip, can occur if the humid hide is allowed to dry out. Annual fecal tests are recommended to check for internal parasites.