Bismarck Ringed Python — Care Sheet & Morphs

Husbandry requirements

Bismarck Ringed Python — origin: Endemic to the Bismarck Archipelago (Papua New Guinea): New Britain, New Ireland and neighbouring islands. Humid lowland tropical forests, forest edges and plantations. PROTECTION: the entire family Pythonidae is listed in Appendix II of CITES (regulated trade, documents/permits required). Historically, a large proportion of the animals in the trade were imported WILD-CAUGHT specimens, often stressed, dehydrated and parasitized: strongly favour captive-bred (CB) animals..

Terrarium temperature gradient

Night min22 °C

Cool side24–26 °C

Warm side30–32 °C

A nocturnal, semi-fossorial species: NO intense luminous hot spot required. Create the gradient with a thermostat-regulated heat mat or cable (probe mandatory). Avoid exceeding 33 °C. A natural nighttime drop down to ~22 °C is tolerated.

Enclosure (adult)

120 × 60 × 45 cm

A well-closed and secured horizontal terrarium (a good escaper), with a deep substrate allowing burrowing and several hides.

Minimum dimensions for an adult; larger is preferable. Provide hides on both sides (warm zone and cool zone) and possibly a low branch. Securing the openings is essential, as the species seeks to escape.

Humidity

60–80 %

A humid tropical atmosphere to be maintained consistently, with good ventilation to avoid stagnation and respiratory infections. A humid area (sphagnum) facilitates shedding.

Substrate

Coconut fibreMoist soil/cocoCypress bark (cypress mulch)Sphagnum moss (humid area)

A thick layer (at least 8-12 cm) allowing the animal to burrow. Keep slightly moist without waterlogging; remove soiling and mouldy areas quickly.

UVB

Optional

Not essential as a nocturnal species. Low UVB (Ferguson zone 1) can be beneficial but remains optional. Maintain a regular day/night photoperiod (about 12 h).

Water source

Always available

A large bowl of clean water at all times, wide enough to allow the snake to immerse itself (aids hydration and shedding). Renew frequently and clean to prevent infections.

Origin

Pythonidae

Endemic to the Bismarck Archipelago (Papua New Guinea): New Britain, New Ireland and neighbouring islands. Humid lowland tropical forests, forest edges and plantations. PROTECTION: the entire family Pythonidae is listed in Appendix II of CITES (regulated trade, documents/permits required). Historically, a large proportion of the animals in the trade were imported WILD-CAUGHT specimens, often stressed, dehydrated and parasitized: strongly favour captive-bred (CB) animals.

Feeding & health

Diet

Carnivore (rodents) — Appropriately sized rodents (mice, then small rats depending on size). In the wild: small mammals and lizards, notably skinks.

Adults: 1 prey item every 7 to 14 days; juveniles more frequently. Prey of a diameter close to the widest point of the body. Wild imports often refuse to feed at first (stress) and may require patience and adjustments (scented prey, a calm atmosphere).

Breeding

Oviparous

Clutch 8–15 eggs/young. Maternal incubation is possible; in an incubator, about 30-31 °C for ~55 to 70 days. Spectacular ontogenetic colour change: neonates bright orange with black rings, gradually turning to a dark, strongly iridescent brown (iridescent sheen) in adulthood.

Health watch points

Internal and external parasites, very common in wild specimens (nematodes, protozoa, mites/ticks): quarantine and a veterinary check-up are essential
Respiratory infections (unsuitable temperature or humidity, insufficient ventilation)
Difficult shed / dysecdysis linked to humidity that is too low
Stomatitis ('mouth rot')
Food refusal and regurgitation, especially in stressed wild imports

Morphs & genetics

Registry of 2 documented genes for Bismarck Ringed Python.

Axanthic (Hypothetical) aneryRec
Patternless (Melanistic?)Dom

Pairing calculator

Pick each parent's genotype — clutch probabilities update live. Free, no sign-up.

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Bismarck Ringed Python × Bismarck Ringed Python

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 bismarck ringed python.

Is the Bismarck Ringed Python suitable for a beginner?▾

It's best reserved for keepers with some prior experience, given its intermediate difficulty level. Non-venomous (a constrictor), it tends to be nervous and quick to bite, especially neonates and wild-caught specimens, although it can be tamed with gentle, brief and regular handling.

Where does this species come from, and what is its legal status?▾

It is endemic to the Bismarck Archipelago in Papua New Guinea (New Britain, New Ireland and neighbouring islands), where it inhabits humid lowland tropical forest. Like the entire Pythonidae family, it is listed on CITES Appendix II, meaning trade requires documentation and permits.

Is it better to buy a wild-caught or a captive-bred individual?▾

Captive-bred (CB) specimens should be strongly favoured. Historically, a large proportion of animals in the trade were imported wild-caught individuals, often stressed, dehydrated and parasitised, with far more problematic longevity and acclimatisation.

Why do the orange babies turn brown as they grow?▾

The species undergoes a spectacular ontogenetic colour change: neonates display bright orange bands alternating with ink-black, then gradually shift to a dark, strongly iridescent brown in adulthood. So buying an orange baby is no guarantee of an orange adult.

What size and lifespan should I expect?▾

It's a medium-sized python measuring 120 to 180 cm, with females noticeably larger and heavier-bodied than males. Well kept and fed responsibly, it lives 15 to 20 years, sometimes longer.

What terrarium and substrate should I provide?▾

A well-closed, secure horizontal terrarium of at least 120 x 60 x 45 cm, as it's a capable escape artist. Being semi-fossorial, it needs a deep substrate (at least 8 to 12 cm) of coconut fibre, moist soil or cypress bark to burrow into, plus hides on both sides of the thermal gradient.

What temperatures should be maintained?▾

A warm side of 30-32 °C and a cool side of 24-26 °C, never exceeding 33 °C, with a tolerated nighttime drop to around 22 °C. As a nocturnal, semi-fossorial species, it doesn't need an intense overhead basking spot: create the gradient with a thermostat-regulated heat mat or cable, with a probe mandatory.

What humidity level does it need?▾

A constant humid tropical atmosphere of 60 to 80%, with good ventilation to prevent stagnant air and respiratory infections. A moist sphagnum area also helps with shedding.

What does it eat, and how often?▾

It's a carnivore that feeds on appropriately sized rodents (mice, then small rats), with prey diameter close to the widest point of its body; in the wild it also takes small mammals and skinks. Feed adults every 7 to 14 days and juveniles more often. Wild-caught imports often refuse food at first and require patience and adjustments (scented prey, a calm environment).

Does it need a water bowl and UVB?▾

Provide a large bowl of clean water at all times, wide enough for the snake to soak in, which helps with hydration and shedding. UVB isn't essential for this nocturnal species; low-level UVB (Ferguson zone 1) remains optional but beneficial, provided a regular photoperiod of around 12 hours is maintained.

How does it reproduce?▾

Oviparous, laying 8 to 15 eggs. Maternal incubation is possible, or artificial incubation at around 30-31 °C for roughly 55 to 70 days.

What health issues should be watched for?▾

Internal and external parasites are very common in wild-caught specimens (nematodes, protozoa, mites, ticks), making quarantine and a veterinary check-up essential. Also watch for respiratory infections, difficult sheds linked to insufficient humidity, stomatitis (mouth rot), and food refusal with regurgitation in stressed imports.

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