White-lipped Island Pit Viper — Care Sheet & Morphs

Husbandry requirements

White-lipped Island Pit Viper — origin: Indonesia (Sunda Islands: Java, Bali, Lombok, Sumbawa, Komodo, Flores, Timor) and East Timor. An insular species of lowland and hill tropical forests, often near watercourses and forest edges..

Terrarium temperature gradient

Night min22 °C

Cool side24–26 °C

Warm side28–30 °C

A nocturnal forest species: NO intense hot spot. Gentle, diffuse heating (cable/panel regulated by a thermostat) creating a gradient. Avoid any accessible heating element that could cause burns. A slight nighttime drop is beneficial.

Enclosure (adult)

60 × 45 × 90 cm

Vertical arboreal terrarium, fully enclosed and secured (lockable), with cross-ventilation

An arboreal species: favour height. Provide numerous horizontal and diagonal branches, dense foliage (live or artificial plants) and elevated hiding spots. SAFETY WARNING: a VENOMOUS snake, medically significant bite; a lockable 'hot cage' type terrarium, signposted, handled exclusively with hook/tongs and by a trained keeper. Check local legislation (keeping venomous animals is often regulated or prohibited).

Humidity

65–85 %

High humidity but with good ventilation to avoid stagnation. Daily misting (morning/evening); let it dry partially between two to prevent respiratory and skin infections.

Substrate

Coconut fibreHumus-rich potting soil / coco-soilSphagnumElm/cypress bark

Substrate that retains moisture without becoming waterlogged. A layer of sphagnum in the low areas helps maintain humidity. Promptly remove droppings and uneaten prey.

UVB

Optional

Not essential as a nocturnal species. Low UVB (Ferguson zone 1, UV index ~0.7-1.0) on a 10-12 h cycle can be beneficial to metabolism; always provide densely shaded areas.

Water source

Always available

A large container of clean water renewed regularly. The animal drinks mainly the droplets on the foliage and the walls: misting is essential to its hydration.

Origin

Viperidae

Indonesia (Sunda Islands: Java, Bali, Lombok, Sumbawa, Komodo, Flores, Timor) and East Timor. An insular species of lowland and hill tropical forests, often near watercourses and forest edges.

Feeding & health

Diet

Carnivore (essentially rodents in captivity) — In captivity: mice/pinkies, then rats of suitable size. In the wild: frogs and lizards (and small rodents).

Feed thawed prey of a diameter close to the widest part of the body. Juveniles every 5-7 days, adults every 10-14 days. NEVER feed by hand: use long tongs. Some wild animals, accustomed to amphibians/lizards, require 'scenting' (rubbing the prey with a frog/lizard) to initiate feeding. Avoid overfeeding (obesity is common on an exclusively rodent diet).

Breeding

Viviparous

Ovoviviparous/viviparous: the female gives birth to 5-25 neonates after a gestation of about 5-7 months, generally promoted by a slight winter temperature drop. WARNING: the neonates are fully VENOMOUS and lively from birth; isolate them individually in small secured enclosures.

Health watch points

Respiratory infections (excess stagnant humidity, insufficient ventilation, temperatures too low)
Dysecdysis (incomplete sheds) linked to unsuitable humidity
Stomatitis / 'mouth rot' (often after stress or oral trauma, common in wild-caught animals)
Internal and external parasitism (nematodes, mites) very common in wild animals
Dehydration and food refusal linked to import stress
Thermal burns from a poorly shielded heating element

Morphs & genetics

Registry of 1 documented gene for White-lipped Island Pit Viper.

Hérédité de la Couleur (Simulé) colorInc.d

Pairing calculator

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White-lipped Island Pit Viper × White-lipped Island Pit Viper

Probabilities per gene (independent loci).

Expected clutchSelect at least one gene on a parent.

Frequently asked questions

Answers to the most common questions about keeping the white-lipped island pit viper.

Does this species pose a real danger?▾

Yes, the island pit viper is a venomous snake: defensive and nervous, it readily strikes as soon as it feels disturbed and has an excellent reach. It is suitable only for keepers experienced with venomous snakes, equipped with a locked hot-cage terrarium and handling exclusively with hook and tongs. Check the local legislation on keeping venomous animals beforehand, as it is often strictly regulated.

How big is an adult?▾

As in many Trimeresurus, males are smaller, between 60 and 75 cm, while females reach 80 to 100 cm; the tail is prehensile in both sexes.

What layout for its terrarium?▾

Count on a minimum of 60 x 45 x 90 cm for an adult, clearly favouring height: numerous horizontal and diagonal branches, dense foliage and elevated hiding spots recreate its arboreal way of life. The terrarium must be a true hot-cage, fully enclosed, lockable, with cross-ventilation and danger signage.

What temperatures should be maintained?▾

It does not need an intense hot spot: aim rather for 24-26°C on the cool side and 28-30°C on the warm side, with a slightly cooler night around 22°C. The heat must be diffuse and thermostat-regulated, with no accessible element capable of causing a burn.

What humidity and substrate suit it?▾

It needs humidity between 65 and 85%, maintained by morning and evening mistings, letting the terrarium dry out partially between the two to avoid respiratory and skin problems. A substrate based on coconut fibre, humus-rich soil, sphagnum or elm or cypress bark retains this humidity well without waterlogging the bottom.

What to feed it and how often?▾

In captivity it accepts appropriately sized mice then rats, whereas in the wild it hunts frogs, lizards and small rodents. Youngsters feed every 5 to 7 days and adults every 10 to 14 days, always with long tongs; some wild specimens, used to amphibians, may need light scenting of the prey to start feeding.

Does it need a water source?▾

A large container of clean water, renewed regularly, must be present at all times, but most of its hydration comes from the misting droplets deposited on the foliage and walls: without daily spraying, it risks dehydration.

What is its life expectancy?▾

In captivity and with suitable care, it generally lives 12 to 15 years; individuals from wild capture, often stressed and parasitised on arrival, frequently have a shorter lifespan.

Can it be tamed or taken out of the terrarium?▾

No: it is a venomous and defensive species, never to be handled bare-handed. Any intervention is done with hook or tongs, by a trained keeper, within a strict safety protocol.

Where does it come from and what is its way of life?▾

It is native to the Sunda Islands of Indonesia (Java, Bali, Lombok, Sumbawa, Komodo, Flores, Timor) and East Timor, where it occupies the tropical lowland and hill forests near watercourses. Its activity is nocturnal.

How does reproduction take place?▾

It is a viviparous species: the female gives birth to 5 to 25 young after a gestation of 5 to 7 months, often promoted by a slight winter temperature drop. The newborns are fully venomous and lively from birth; it is recommended to isolate them individually in small secured boxes.

What health problems should be watched for?▾

The main risks are respiratory infections linked to excess stagnant humidity or temperatures that are too low, incomplete sheds when humidity is poorly set, stomatitis, and internal or external parasitism, very common in wild specimens. Also take care to properly shield any heating element, as a poorly insulated source can cause burns.

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