Acrantophis dumerili

🔤 Taxonomy

Acrantophis dumerili is the accepted scientific name for Dumeril’s boa. In trade, keep it separate from other Madagascan boas and prefer animals with clear origin documents.

English common names used in the hobby:

• Dumeril’s boa

📌 Description

Dumeril’s boa (Acrantophis dumerili) is a heavy-bodied Malagasy boa with a calm reputation, but it is still a strong, long-lived constrictor. It suits keepers who can provide deep cover, steady ground heat, and secure handling routines instead of frequent display handling.

Handling should be calm and brief, especially for newly acquired or recently fed animals. Large constrictors require a realistic safety plan: do not handle powerful adults alone, and never let children manage them without direct adult control.

Dumeril’s boas are usually calmer than many arboreal boas, but they are strong, heavy-bodied snakes. Their enclosure should prioritize floor area, cover, and safe lifting/cleaning access.

🌍 Distribution

Southwestern and southern Madagascar; dry forest, thorn scrub, savanna edges, and disturbed areas.

In captivity, that dry-forest background points to a heavy terrestrial setup: deep cover, a broad warm-to-cool floor gradient, moderate humidity with shed support, and enough room to lift and clean around a strong boa. Use animals with clear captive-bred paperwork, especially because of the CITES/EU listing.

🌡 Climate across the native range

Monthly climate normals from reviewed GBIF occurrence locations:

Weather data by WorldClim v2.1 · Monthly normals queried by Herpeton Academy from raster values; relative humidity is derived from vapor pressure and mean temperature.

Location references use GBIF.org occurrence data where available; original occurrence records retain their source dataset licenses.

⚖️ Legal status

As checked against official CITES and EU sources in May 2026, Acrantophis dumerili is listed in CITES Appendix I and EU Annex A through the Acrantophis spp. listing. The species is not relevant to the Bern Convention because it is not native to Europe. Local rules on ownership, import, sale, transport, breeding, dangerous-animal registration, marking, certificates, and proof of legal origin may still apply; keep purchase and breeding records.

🧭 Life stage differences

Babies and juveniles should start in smaller, secure enclosures where feeding, shedding, and waste can be monitored closely. They still need a warm hide, cool hide, water, and cover, but oversized bare spaces often make them defensive or reluctant to feed.

Adults need more floor area, stronger fixtures, and a layout that lets the snake thermoregulate without constant exposure. For very large species, enclosure planning must happen before purchase: the adult cage, safe cleaning routine, and long-term prey supply are part of basic care, not optional upgrades.

🤌 Husbandry

• Adult enclosure: 180 × 90 × 90 cm (length × width × height).

Increase the length if the snake cannot straighten fully; the stated dimensions are a planning example, not a limit for larger adults.

Use an escape-proof enclosure with front access where possible, secure ventilation, and all heat sources controlled by thermostats. Minimum adult housing: 180 × 90 × 90 cm for one adult; larger for big females. Bigger is recommended when it creates more usable movement, better thermal zones, and safer maintenance.

Provide at least two tight hides, visual barriers, and stable climbing or resting structure according to the species. Do not mix snakes. Quarantine new animals and track feeding, sheds, weight, and defecation.

Daily care should be predictable: check temperatures, water, locks, faeces, urates, shed condition, and behaviour before disturbing the snake. A simple written log makes feeding problems, weight loss, repeated bad sheds, or seasonal changes much easier to interpret.

💡 Lighting

Use a steady 10-12 hour light cycle. Low-output UVB can sit over one side, but this secretive boa must have deep shade, tight cover, and dark nights.

🌡 Heating and temperature

Practical target range: basking 31-33 °C, warm side 27-29 °C, cool side 23-25 °C, night 21-23 °C. Measure warm surfaces with an infrared thermometer and ambient zones with digital probes. Every heat source must be controlled by a thermostat. Heat rocks and unguarded bulbs are unsafe; large pythons and boas can burn themselves or break weak fixtures.

💧 Humidity and water

Air humidity: 40–60%. Practical air-humidity range, not a physiological limit. Measure at animal height, away from wet surfaces and direct heat.

Provide fresh water at all times. Target humidity: 40–60%, slightly higher during shed. Use substrate choice, water-bowl placement, partial ventilation control, and a humid hide to manage shedding. Chronic wet bedding causes scale and respiratory problems; chronic dryness causes retained shed and dehydration.

🌿 Enclosure and decoration

The enclosure should include a warm hide, cool hide, water bowl, rough but safe shedding surfaces, and enough cover for the animal to move without feeling exposed. Arboreal species need secure branches and elevated perches; heavy terrestrial species need floor space and furnishings that cannot collapse.

Juvenile enclosures should be simple enough to inspect but not bare. Adult enclosures must be built for strength: locks, cable ports, sliding doors, and ventilation panels are common escape points.

For active terrestrial and semi-arboreal snakes, use both horizontal distance and low climbing structure. A plain enclosure may keep the snake alive, but it often produces pacing, nose rubbing, poor muscle tone, or defensive behaviour.

🪳 Feeding

Feed appropriately sized frozen-thawed prey whenever possible. Prey should generally match the snake’s widest body diameter, adjusted for species build and age. Babies usually feed every 5-7 days, juveniles every 7-10 days, and adults every 10-21 days depending on species, temperature, season, and body condition.

Avoid routine live feeding, oversized prey, and handling for at least 48 hours after meals. Refusal to feed is often caused by wrong temperatures, exposure, shedding, breeding season, stress, or prey presentation.

Adjust feeding by body condition, not by appetite alone. A snake that always eats can still become obese, while a seasonal refusal may be normal if weight is stable and the enclosure is correct.

🥚 Breeding

Breeding should use healthy, mature, well-established animals with known identity and origin. Many pythons and boas respond to seasonal changes in temperature, light, or humidity, but cooling must never be attempted with underweight, sick, or newly acquired animals.

This is a live-bearing boa, so breeding plans must include space for newborn snakes rather than egg incubation. Watch the female’s body condition closely, provide secure warm and cool retreats, and prepare individual rearing tubs before birth. Keep records for CITES/EU-listed species and avoid producing hybrids, unclear locality crosses, or more offspring than can be housed and placed responsibly.

🩺 Common problems

Common problems include retained shed, respiratory infection, mites, burns, mouth inflammation, obesity, dehydration, regurgitation, and injuries from escapes or unstable decor. Warning signs include wheezing, bubbles at the nostrils, open-mouth breathing, repeated soaking, patchy shed, refusal to feed with weight loss, swelling, twisting posture, or repeated regurgitation.

Consult a reptile- or exotic-animal veterinarian for severe weakness, injury, breathing signs, swelling, repeated regurgitation, or prolonged refusal to eat.

If a problem appears, first verify the basics with instruments: warm surface, cool end, night temperature, humidity, hide fit, and prey size. Guessing at treatment before correcting the environment often wastes the most important recovery window.

📌 Conclusion

Acrantophis dumerili does best when the keeper plans for the adult animal, not only the attractive juvenile. Secure housing, measured heat, appropriate humidity, correct feeding, and honest legal records are the foundation of responsible snake keeping.

📚 Sources and further reading

Taxonomy and legal references identify names and listing frameworks; they do not establish care limits. General husbandry references support the precautions described. Unless tied to a specific study in the text, the numerical enclosure, climate and feeding recommendations are editorial planning guidance, not experimentally established species-specific limits.

• CITES Appendices, checked 2026-05-04
• GBIF: Acrantophis dumerili — taxonomy and recorded distribution; not a husbandry study
• European Commission: wildlife-trade framework and annex resources
• Merck Veterinary Manual: thermal gradients, ventilation, quarantine and recordkeeping; general reptile guidance
• Enclosure planning reference: ReptiFiles — Acrantophis dumerili enclosure guidance — species enclosure guidance; the adult plan and any size-dependent adjustments are explained above.
• Humidity and moisture reference — Practical husbandry context; numerical endpoints may be editorial guidance, not established physiological limits.