The Leachianus gecko lives large.

Rhacodactylus leachianus is one of the world's largest living geckos: a nocturnal, tree-dwelling New Caledonian species with a broad head, loose velvet-like skin, powerful gripping feet, and a body built for substantial forest branches.

The body alone can reach roughly 25–30 cm (10–12 in) before the tail. Total length varies with population and tail history, which is why a juvenile or a locality label should never be used to justify a small adult home.

Plan for at least 20 years; some care guides cite 20–30. The enclosure, moves, veterinary costs, daily routine, and a backup keeper all belong in the decision before adoption.

Mostly from dusk to dawn. In the wild they shelter in tree holes and crevices by day, then forage through the canopy at night. A hidden daytime gecko is not failing to be a pet.

Current taxonomy treats Rhacodactylus leachianus as one monotypic species. The 2012 revision regards henkeli as a southern-islet morph rather than a valid subspecies, and aubrianus as a synonym. Trade locality labels should not promise size, temperament, care, or value.

They are a specialist-sized commitment, even when the daily routine looks simple. A prepared keeper needs the full adult enclosure, safe access around a powerful animal, complete food and live-invertebrate plans, measured climate choices, and a reptile veterinarian before the gecko arrives.

Some calmly accept brief supported handling; others prefer not to. Never assume tame. Let the gecko choose, stay low over a safe surface, and stop for retreat, vocal or open-mouth warnings, lunging, or repeated escape attempts. A threatened adult may bite.

Plan one adult per home. Older guides discuss pairs and one field study found overlapping wild home ranges, but neither establishes safe routine companionship in captivity. Pairing is an advanced breeding project with injury risk and separate housing ready.

Plan from 120 × 60 × 120 cm (48 × 24 × 48 in) of usable internal space for one adult. Add trunk-width cork and branches, elevated hollows, deep cover, water and food ledges, shade, cooler routes, ventilation, and strong secure doors. More depth is genuinely useful.

Sources do not give one easy number. ReptiFiles uses a 30–31°C (86–88°F) sturdy upper perch, 22–26°C (72–78°F) ambient space, and 19–22°C (66–72°F) nights; one island field study found mean core temperatures near 23°C. Use guarded thermostatic heat only with easy cooler escape, measure several heights, and have the exact setup reviewed.

Use a rise-and-fall rhythm, not a wet box. A current guide describes 60–80% average with lower daytime readings. Mist, leave ventilation open, let surfaces dry, and watch the enclosure, skin, and sheds instead of chasing one permanent number.

Sources disagree. One current guide proposes measured UVI 2–3; older institutional and general veterinary guidance is less prescriptive. If you use UVB, measure it at the gecko's back height, cover only part of the home, and leave full shade. Do not choose from bulb percentage alone.

A complete formulated New Caledonian gecko diet is the practical foundation, with appropriately sized live invertebrates added thoughtfully. Baby food, homemade fruit-meat mixes, and vertebrate prey are not needed for a modern public care plan.

There is no calendar that fits every age, body condition, product, appetite, and setup. Follow the complete-diet directions, track weight and food acceptance, and adjust live invertebrates and supplements with a reptile veterinarian.

Yes. Keep clean fresh water available at all times in a stable dish. Misting can leave useful droplets, but it does not replace a reliable water source or fresh air.

Start with a surface that keeps a new gecko's food, waste, hydration, and sheds easy to monitor. A healthy established adult may suit a well-managed naturalistic substrate with leaf litter, but it must handle moisture without becoming waterlogged and support safe heavy furnishing.

Do not pull it. Check water, the humidity rhythm, ventilation, cover, textured surfaces, toes, eyes, and skin folds. Recurring trouble or eye and toe concerns belong with a reptile veterinarian.

Call for persistent changes in appetite, weight, droppings, activity, eyes, skin, shedding, tail, movement, breathing, swelling, weakness, or injury. These are reasons to call, not a diagnosis.

Yes. Wash with soap and running water after the gecko, food, insects, waste, water, or equipment, and keep every supply out of kitchens and food-preparation areas. Higher-risk households need particular care.

Run the adult enclosure first. Confirm strong climbing routes, secure doors, upper and cooler choices, humidity dry-down, ventilation, shade, water, food ledge, cleaning access, transport carrier, and reptile-veterinary contact. Then verify documented captive-bred origin or a reputable rescue history.