Wagner’s Viper

🔤 Taxonomy

Montivipera wagneri, formerly Vipera wagneri, is also called the ocellate mountain viper. The pale-centred, dark-edged dorsal blotches are distinctive, but identity should rest on breeding records and expert verification rather than a photograph. Preserve this name on CITES and transfer paperwork.

Compare the separate guide to Montivipera raddei before transferring a care protocol between taxa.

📌 Description

An adult is broadly around 50-90 cm, with a sturdy body and conspicuous ocellated pattern. This species has been maintained and bred in zoo assurance collections, but that success depends on specialist staff and infrastructure. It is a medically significant display animal, not a handling snake or an entry point into venomous keeping.

The numerical targets below are conservative starting points for an experienced collection, informed by mountain-viper husbandry and natural history. They are not experimentally established optima or tolerance limits for this species. Enclosure dimensions are a practical recommendation, not a published minimum. Keep locality records and adjust with an experienced reptile veterinarian; species-specific longevity data are too limited to promise a lifespan.

📋 Quick reference

🌍 Distribution

The documented range centres on eastern Türkiye, with the historical type locality near Lake Urmia in northwestern Iran. More recent Turkish surveys extend the known distribution beyond the familiar Kars localities. Rocky slopes with grassy or shrubby cover provide both basking and retreat sites. The map includes the published Iranian record; it does not claim continuous occupancy between localities.

🌡 Climate across the native range

Monthly outdoor normals provide seasonal context, not enclosure settings. Mountain crevices and winter refuges differ from these grid averages.

Weather data by Open-Meteo.com · CC BY 4.0 · Monthly normals calculated by Herpeton Academy from daily archive values.

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

⚖️ Legal status

CITES lists Montivipera wagneri in Appendix II, and the EU lists it in Annex B. International transfers need the applicable CITES documentation; EU transactions also require evidence of lawful acquisition. Bern Appendix II lists it under Vipera wagneri. Confirm the documents for the actual animal and movement rather than relying on the seller’s general permit.

Legal review: 17 September 2026. Check the accepted name and older Vipera combination. National rules on capture, possession, registration, transport, breeding, sale and import can be stricter than the treaty listings. Obtain written confirmation from the relevant authority before a transfer, and retain the invoice, breeder details, parentage, locality and permit documents. A captive-bred label alone does not establish lawful origin.

☠️ Venom

A bite is a medical emergency: expect potentially severe pain, swelling and tissue injury, with possible clotting disturbances, bleeding or systemic illness. Clinical reports are sparse and venom effects differ between taxa and individuals; laboratory findings cannot predict the course of a particular bite. Neither a small snake nor an apparently dry bite is reassuring.

Move away, call emergency services, remove rings and other tight items, keep the person still and support the limb without compression. Do not cut, suck, ice or tourniquet the wound, or delay transport to catch the snake. Follow poison-centre instructions. Antivenom choice and availability must be agreed with a receiving hospital in advance; a product intended for another viper is not automatically effective. Treatment belongs in hospital.

🤌 Husbandry

Keep one animal per enclosure in a locked, access-controlled venomous-reptile room with secondary containment. Provide lockable shift compartments that allow the snake to be isolated and visually accounted for before cleaning or changing water. A written bite and escape plan, trained backup keeper and an agreed veterinary service must exist before acquisition. Never free-handle or attempt home restraint.

Quarantine new arrivals separately for at least 90 days as a working minimum, extending it if the veterinarian advises. Use dedicated tools, simple furnishings and paper substrate; record meals, sheds, faeces and body condition. Arrange parasite screening and veterinary review for animals of uncertain origin, weight loss or abnormal stools. Weigh only through an established protected-contact procedure.

💡 Lighting

Use a timer for about 12-14 hours of visible light during the active season, with complete darkness at night. Shorten daylight gradually only as part of a planned seasonal programme. Hides must allow complete retreat from the lamps.

A species-specific UVB requirement has not been established. If low-level UVB is provided, measure exposure, retain deep shade and have the lamp arrangement reviewed by the collection veterinarian. Do not assign a high-output lamp from habitat photographs alone; keep all electrical fittings outside reach or securely guarded.

🌡 Heating and temperature

Ettling and Marfisi’s zoo account describes 17-25°C ambient air and 27-30°C basking sites. A later Saint Louis Zoo welfare study used a different arrangement, approximately 23.9-28.9°C. Those study conditions are observations, not competing universal prescriptions. Here, start with 20-25°C air, a 27-30°C basking surface, an 18-22°C refuge and 17-20°C nights, then review the individual’s use of the gradient.

Measure ambient air and basking surfaces separately, with an additional probe inside the cool retreat. Control heating with a thermostat and protect lamps from contact. Test the enclosure through the hottest part of the day before introducing the snake; a thermostat cannot cool an already hot room.

Winter dormancy requires a separate, locality-specific plan for established healthy adults. It is not an automatic consequence of a cold month in the climate table. Do not cool thin, sick, newly acquired or gravid animals, and do not apply an adult breeding cycle to juveniles. Obtain a documented protocol covering preparation, hydration, monitoring and return to feeding rather than improvising a refrigerator cycle.

💧 Humidity and water

Treat the humidity range as an initial management band, measured near the snake rather than beside a wet bowl. Maintain ventilation and a dry resting surface, with a locally moist retreat available during shedding. Persistent condensation calls for a ventilation and temperature review; an air-humidity percentage does not justify wet bedding.

Provide clean drinking water continuously in a stable bowl accessible through protected servicing. Check water and urates daily. Do not force soaking or peel retained skin; recurrent shedding difficulty needs a review of hydration, conditions and health.

🌿 Enclosure and decoration

Use the dimensions in the table for one adult, increasing floor space for an unusually large individual. The snake must be able to stretch fully. Fit independent locks, secure ventilation mesh and seal cable openings; assess gaps against neonate size if breeding is planned. Keep both the warm and cool retreats accessible.

Once quarantine is complete, a roughly 5-8 cm layer of compactable soil mixed with washed sand can support stable footing and a slightly moist lower layer. Keep most of the surface dry. Use fixed slabs or artificial rocks, low cover and clear sightlines to shift doors. Avoid unstable stone piles, sharp gravel, aromatic wood and deep loose sand. Remove waste promptly after isolating the snake; a planted enclosure still needs inspection.

🐁 Feeding

Offer a modest thawed whole mouse approximately every 14-21 days to an adult during the active season. Start with prey no wider than the snake’s widest body section and adjust to body condition; a thick-bodied viper is easily overfed. Juveniles need smaller meals, often about every 7-10 days, under the breeder’s established protocol.

Use the enclosure’s protected feeding system. Avoid live rodents, substrate-covered prey and unnecessary disturbance after a meal. Whole-prey feeding normally requires no routine vitamin or calcium dusting. A refusal accompanied by weight loss, wheezing, oral discharge or regurgitation needs veterinary assessment; do not force-feed at home.

🥚 Breeding

This species gives birth to live young; there is no egg-incubation schedule. Confirm sex through a qualified professional and keep locality lines separate. Pair only mature, healthy animals with documented recovery after previous reproduction; size and condition are more useful than a universal age threshold.

Introductions and births increase exposure risk. Prepare individual locked neonatal enclosures and an approved separation procedure before pairing. Keep records of parentage, birth dates, first sheds and meals. Do not produce offspring without lawful placements and staff able to manage neonates safely.

Zoo observations document male combat and seasonal reproduction. The welfare study also found a physiological response to increased cleaning disturbance: remove soiling promptly, but avoid stripping a clean enclosure daily simply for appearance. Neither that study’s small research housing nor its feeding interval establishes a permanent welfare minimum for other collections.

🩺 Common problems

• Overheating: repeated attempts to leave the warm area or abnormal exposed resting warrant an immediate check of the cool retreat and room temperature.
• Respiratory infection: bubbles, wheezing or open-mouth breathing require prompt reptile-veterinary assessment.
• Dysecdysis and dehydration: review drinking access and the moist retreat; never attempt manual skin removal.
• Dermatitis: wet bedding and dirty retreats can damage ventral scales.
• Obesity, regurgitation and parasites: track body condition and meal history; persistent change needs diagnosis, not a larger meal or automatic deworming.

📌 Conclusion

A legally documented, institutionally managed line is the appropriate starting point for this viper. The ability to service it with little disturbance and maintain an effective emergency plan is more important than its striking pattern.

📚 Sources and further reading

ReptiFiles was checked first on 17 September 2026; no species-specific guide was found. Zoo studies below provide direct evidence for M. raddei and/or M. wagneri, and comparative evidence only for other species. Practical recommendations are distinguished from study conditions in the text.

• ReptiFiles
• Taxonomy and range
• GBIF taxonomy
• Zoo husbandry and seasonal reproduction
• Wagner’s viper welfare study
• Venom effects and antivenom research
• WHO snakebite first aid
• CITES Appendices, official copy dated 5 March 2026
• EU wildlife-trade annexes, Regulation 2026/1383
• Bern Convention appendices and amendments
• Bern Convention Appendix III
• Saint Louis Zoo: Wagner’s viper conservation
• Baines et al. (2016): UV-Tool
• Official guidance on keeping venomous snakes