Dumeril's Boa — Care Sheet & Morphs

Q: How big does an adult Dumeril's Boa get?

An adult Dumeril's Boa typically measures 1.5–2.5 m.

Husbandry requirements

Dumeril's Boa — origin: Southern and south-western Madagascar (dry forests, semi-arid areas and scrubby forest edges). Protected endemic species: listed on CITES Appendix I and Annex A of the EU regulation — keeping, sale and transport require legal documents (CITES certificate / transfer certificate) and breeding from captive-born animals. No wild-caught specimens should be acquired..

Terrarium temperature gradient

Night min22 °C

Cool side24–27 °C

Warm side30–32 °C

A horizontal thermal gradient is essential. A warm spot/zone on the floor around 32 °C for digestion (heat mat or heat cable on a thermostat, or a ceramic emitter) — no intense basking light is needed as the species is not heliophilic. A night-time drop to 22 °C is beneficial; during a breeding cycle, winter nights can be lowered to 18-20 °C for a few weeks. Every heating element must be controlled by a thermostat and guarded to prevent burns.

Enclosure (adult)

180 × 90 × 75 cm

Horizontal terrestrial terrarium, sturdy and well ventilated

Minimum dimensions for an adult; go larger for a big female (200 x 100 cm). A terrestrial species and occasional burrower: provide a large floor area rather than height. Provide at least two solid hides (a warm zone and a cool zone) and a few low branches or décor elements. Lockable lid/doors: a powerful boa can force a weak closure.

Humidity

50–70 %

Moderate humidity reflecting the Madagascan dry forest. Maintain 50-60% routinely, with peaks at 70% during sheds (light misting or a humid area). Avoid permanently high humidity combined with poor ventilation, a cause of respiratory infections and skin fungal infections.

Substrate

Coconut fibreOrchid bark or cypress chipsFertiliser/pesticide-free soil mixPaper/paper towel (quarantine)

A substrate that retains moisture moderately, deep enough to allow slight burrowing (5-10 cm). Remove droppings and soiled areas immediately. Avoid fine softwood chips (cedar, pine), which irritate the airways.

UVB

Optional

Not essential (a cathemeral/crepuscular ambush species), but low-level UVB (UV index ~1-2, low-power or diffused T5 tube) benefits metabolism and well-being. Provide hides offering an area of full shade.

Water source

Always available

A large, clean and stable water bowl, wide enough to let the snake soak, especially before shedding. Change the water regularly and clean/disinfect the container to limit bacterial growth.

Origin

Boidae

Southern and south-western Madagascar (dry forests, semi-arid areas and scrubby forest edges). Protected endemic species: listed on CITES Appendix I and Annex A of the EU regulation — keeping, sale and transport require legal documents (CITES certificate / transfer certificate) and breeding from captive-born animals. No wild-caught specimens should be acquired.

Feeding & health

Diet

Carnivore — Appropriately sized rodents (mice for juveniles, rats then large rats for adults); an occasional rabbit or guinea pig for very large females.

Thawed prey of a diameter close to the widest part of the snake. Juveniles: every 7-10 days; adults: every 2-4 weeks. A species prone to obesity: do not overfeed and adjust the schedule to body condition and season.

Breeding

Viviparous

Breeding is generally triggered by winter cooling (cooler nights, shorter days) over several weeks. Gestation of about 6-8 months; typical litters of 6 to 20 independent neonates (sometimes more in large females). Breeding should only be done with legally held animals (CITES/EU) and documented traceability.

Health watch points

Respiratory infections (open-mouth breathing, wheezing, mucus) linked to poorly managed cold or humidity
Snake mite infestation by Ophionyssus natricis
Incomplete shed/dysecdysis (retained flakes, especially over the eyes) from a lack of humidity or a water source
Obesity from overfeeding, common in this species
Inclusion body disease (IBD, arenavirus infection) affecting boids; strict quarantine of new animals

Morphs & genetics

Registry of 3 documented genes and 3 named combos for Dumeril's Boa.

Hypo (Hypomelanistic) hypoDom
Axanthic (Anerythristic) axanthRec
Caramel Albino (T+) caramelRec

Named combos — 3 documented combined morphs

GhostSnow (Théorique)Sunglow (Théorique)

Pairing calculator

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

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Dumeril's Boa × Dumeril's Boa

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 dumeril's boa.

How big does an adult Dumeril's Boa get?▾

An adult Dumeril's Boa typically measures 1.5–2.5 m (total adult length. females are larger and more heavily built than males; most specimens measure 160-200 cm, with large females approaching or exceeding 250 cm. a stocky, heavy boa (3-8 kg).).

What temperature and humidity does a Dumeril's Boa need?▾

A gradient of roughly 24–27 °C on the cool side to 30–32 °C on the warm side. Humidity 50–70 %.

What does a Dumeril's Boa eat?▾

Carnivore: Appropriately sized rodents (mice for juveniles, rats then large rats for adults); an occasional rabbit or guinea pig for very large females..

Is the Dumeril's Boa a good reptile for beginners?▾

Intermediate level. Docile, calm and rarely defensive once acclimatised; bites are rare. A powerful, heavy snake: two-person handling is recommended for large adults. Non-venomous. Plan ahead: a lifespan of 20–30 yrs.

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