Nose-horned Viper — Care Sheet & Morphs

Husbandry requirements

Nose-horned Viper — origin: South-eastern Europe and Asia Minor: north-eastern Italy, the Balkans, Greece, as far as Austria and Hungary, Turkey and the Caucasus. Occupies sunny rocky slopes, scree, dry-stone walls and garrigue..

Terrarium temperature gradient

Night min16 °C

Cool side20–24 °C

Warm side26–30 °C

Basking spot32–35 °C

A heliophilic species of rocky habitats: a genuine basking hot spot (32-35 °C) is necessary, with a marked thermal gradient. A night-time drop is beneficial (16-20 °C). A winter brumation of 2 to 3 months at 5-10 °C is essential for wellbeing and reproduction.

Enclosure (adult)

100 × 50 × 60 cm

A secure terrestrial/saxicolous terrarium for a venomous species: lockable closure, front opening, a stack of stable stones (placed on the floor, never on loose substrate that could collapse), low branches and multiple hides.

Minimum dimensions for one adult; enlarge for a pair. Safety (locks, a two-person opening protocol, a hook and a restraint box) takes precedence over everything: an escape is a public danger. Ample ventilation.

Humidity

40–60 %

A rather dry environment but with a more humid microclimate under the hides; a slight rise during sheds. Avoid stagnant humidity.

Substrate

Non-clumping topsoil/sandHeath soilFine gravelFlat stones

A free-draining soil-sand type mix with rocky areas and a few leaves/bark; avoid dusty or overly damp substrates.

UVB

Recommended

Low to moderate UVB recommended (UV index 1-2, Ferguson zone 2 type) for this diurnal species that basks in the sun; it improves calcium metabolism. Provide shaded areas.

Water source

Always available

A bowl of clean water available at all times, renewed regularly; the animal drinks and may bathe in it before shedding.

Origin

Viperidae

South-eastern Europe and Asia Minor: north-eastern Italy, the Balkans, Greece, as far as Austria and Hungary, Turkey and the Caucasus. Occupies sunny rocky slopes, scree, dry-stone walls and garrigue.

Feeding & health

Diet

Carnivore (ambush predator) — Rodents, birds and lizards; juveniles feed mainly on small lizards and sometimes invertebrates.

A very effective ambush predator. Feed dead (thawed) prey of a suitable size; adults every 10-14 days, juveniles more often. Handling ONLY with a hook/tongs, never by hand.

Breeding

Viviparous

Reproduction is triggered by a winter brumation. Neonates, already venomous and independent, are born in late summer/autumn. Gravid females are more irritable; there is a risk of dystocia.

Health watch points

Respiratory infections (poor ventilation or temperatures that are too low)
Stomatitis (mouth rot) often linked to stress or trauma
Mites and parasites (common in wild specimens)
Dysecdysis (difficult sheds) from inadequate humidity
Dystocia/egg retention in breeding females

Morphs & genetics

Registry of 3 documented genes and 1 named combos for Nose-horned Viper.

Albino (T-) amelanisticRec
Melanistic (Black) black adderInc.d
Axanthic (Hypothetical)Rec

Named combos — 1 documented combined morphs

Snow

Pairing calculator

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Nose-horned Viper × Nose-horned Viper

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 nose-horned viper.

Is the nose-horned viper dangerous, and who is allowed to keep one?▾

Yes: this is a medically significant venomous species, to be reserved exclusively for expert keepers trained in handling venomous species and legally authorised to own them. Although generally lethargic and relying first on its camouflage, it hisses very loudly and strikes with great speed when it feels threatened; any direct handling with bare hands is strictly prohibited.

What kind of secure terrarium is required?▾

A terrestrial/saxicolous terrarium of at least 100 x 50 x 60 cm, with a lockable closure and front-opening access, enlarged for a pair. Stack stable rocks placed directly on the floor, never on a loose substrate that could collapse, add low branches and several hides, and ensure abundant ventilation: safety - locks, a two-person opening protocol, a hook and a restraint box - must take precedence over everything, because an escape represents a public danger.

What temperatures should be maintained, and why is winter brumation essential?▾

This heliophilous, rock-dwelling species needs a genuine basking hotspot between 32 and 35°C, a warm side at 26-30°C and a cool side at 20-24°C, with a beneficial nighttime drop to 16-20°C. A winter brumation of 2 to 3 months at 5-10°C is essential to its general well-being and also conditions its reproduction.

What humidity and substrate suit it?▾

The environment should stay fairly dry, between 40 and 60% humidity, with a slightly more humid microclimate under the hides and a slight rise during sheds. A well-draining mix of topsoil and sand, dressed with rocky areas, fine gravel and a few leaves or pieces of bark, works well; avoid any dusty or overly damp substrate.

What does the nose-horned viper eat and how often should it be fed?▾

A highly effective ambush predator, it feeds on rodents, birds and lizards in the wild; in captivity, offer appropriately sized dead, thawed prey every 10 to 14 days for adults, a little more often for juveniles. Prey, like the snake itself, is handled only with a hook or tongs, never by hand.

Is UVB needed, and how should the water source be managed?▾

Low to moderate UVB (UV index 1-2, Ferguson zone 2) is recommended for this diurnal species that basks in the sun, provided shaded areas are always available. A clean water bowl must remain accessible at all times and be refreshed regularly; the nose-horned viper drinks from it and may bathe in it before a shed.

What size does this viper reach, and how do you tell males from females?▾

The average adult size ranges between 60 and 90 cm, with records exceeding 100 cm. Females are often larger and brownish, whereas the smaller males display a grey coloration with a strongly contrasting black pattern.

How does it reproduce, and are the newborns already dangerous?▾

It is an ovoviviparous species: the female gives birth to already-formed young, reproduction being triggered by winter brumation and birth taking place in late summer or autumn. Crucially, the neonates are already venomous and completely self-sufficient from birth, and gravid females, being more irritable, present a risk of dystocia.

What is its lifespan, and is it a beginner's species?▾

Expect generally 10 to 15 years, with well-kept captive specimens capable of exceeding 20 years. It is absolutely not a beginner's species: its venomous status places it at expert level, reserved for experienced keepers who are legally compliant.

Where does the nose-horned viper come from and what habitat is recreated in captivity?▾

It is native to south-eastern Europe and Asia Minor: north-eastern Italy, the Balkans, Greece, as far as Austria, Hungary, Turkey and the Caucasus, where it occupies sunny rocky slopes, scree, stone walls and garrigue. It is this environment that must be recreated in the terrarium, with stacked rocks, dry areas and multiple hides.

Does the nose-horned viper's activity pattern change with the season?▾

Yes: it is diurnal in spring and autumn, but becomes nocturnal or crepuscular during the intense heat of summer to avoid the strongest sun. In winter, it fully overwinters in brumation, a resting phase essential to its natural cycle.

What health problems should be watched for?▾

The most common are respiratory infections linked to poor ventilation or overly low temperatures, stomatitis often caused by stress or trauma, mites and parasites (frequent in wild-caught specimens), difficult sheds in case of unsuitable humidity, and dystocia or egg retention in breeding females.

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