Nikolsky’s Viper — Fact Sheet

Vipera nikolskii · Nikolsky’s Viper

Full care guide and sources

📋 At a glance

🏠 Enclosure

One adult: 100 × 60 × 50 cm; enlarge for larger animals. Relative humidity 55–70%, with dry rests, a locally moist refuge and water. Locked enclosure, locked room, protected servicing and separate quarantine of at least 90 days.

🪨 Substrate and furnishings

• Give the snake enough uninterrupted floor length to stretch fully. Secure ventilation mesh, doors and cable entries, checking gaps against the smallest animal present. Place cover in both thermal zones and fix stones against collapse. After quarantine, 5–8 cm of compactable soil mixed with washed sand, with a little leaf litter, can provide firm footing and local moisture. Keep most of the surface dry. Avoid sharp gravel, aromatic wood and inaccessible cavities; paper remains useful for sick animals.

💡 Lighting

• Provide 12–14 hours of visible light in the active season and darkness at night. Keep full shade available. No species-specific UVB optimum is established; if low-level UVB is used, measure exposure and review the arrangement with the veterinarian using the UV-Tool reference. Guard lamps and adjust seasonal day length gradually, in step with the approved winter plan.

🌡️ Temperature

Provisional active-season values; not species tolerance limits. Locality-specific winter planning requires veterinary review.

• Basking spot: 28-30 °C
• Warm zone: 22-26 °C
• Cool zone: 18-22 °C
• Night: 18-22 °C

💧 Humidity and water

• Air humidity: 55–70%.

• Measure relative humidity near the resting animal, using the table as a provisional band. Keep a slightly moist refuge alongside dry resting surfaces; avoid wetting the whole floor. Ventilation and local moisture are more useful than chasing a single percentage. Supply fresh water continuously in a stable bowl, serviced only after isolation. Persistent poor sheds require a hydration and health review, not forced soaking or peeling.

🪳 Feeding

Established adults: one modest thawed whole mouse every 10–14 days as a starting point; juveniles often 7–10 days with smaller prey. Adjust by body condition; whole rodents normally need no routine dusting.

☠️ Venom

Any bite is a medical emergency; small size or an apparently dry bite is not reassuring.

Move away and call emergency services. Keep the person still, remove rings and tight items, and support the limb without compression. Do not cut, suck, apply ice or a tourniquet, or delay transport to capture the snake. Agree receiving-hospital and poison-centre arrangements before acquisition; antivenom selection and use belong to clinicians. A product labelled for another Vipera species cannot be assumed effective.

Neurotoxic phospholipases have been demonstrated experimentally in V. nikolskii. A 2026 study found variable antivenom recognition and failed neutralisation of its tested venom by the tested commercial V. berus antivenom in an animal assay. This is a warning against assuming cross-protection, not a clinical verdict on every antivenom product.

Full care guide and sources

🩺 Health — warning signs

• Watch for appetite loss, abnormal posture, injury, breathing issues, failed shedding or molting, and sustained weight loss.