Western Diamondback Rattlesnake — Care Sheet & Morphs

Husbandry requirements

Western Diamondback Rattlesnake — origin: Southwestern United States (Arizona, New Mexico, Texas, southern California, Oklahoma, Arkansas) and northern/central Mexico. Arid habitats: deserts, semi-deserts, dry grasslands, rocky scrubland and brushy areas..

Terrarium temperature gradient

Night min20 °C

Cool side24–27 °C

Warm side29–32 °C

Basking spot32–35 °C

Heliophilic desert species requiring a genuine hot basking spot (32-35 °C) under a lamp, with a strong thermal gradient. A nighttime drop is beneficial (down to ~18-20 °C). A winter brumation period at 12-16 °C for 6-10 weeks is useful, particularly for breeding.

Enclosure (adult)

150 × 60 × 45 cm

Sturdy, spacious terrestrial terrarium with a LOCKABLE closure and labelled 'venomous animal'. Secured opening (hatch / shift box) allowing remote handling without direct contact. An essentially ground-dwelling species: favour floor area over height.

Regulated keeping: owning a venomous snake generally requires an official permit (in France, a certificate of competence and an establishment-opening authorisation). Provide several solid hides on both sides of the thermal gradient, a humid hide, and a safety protocol (location of antivenom, poison-control-centre contact). Not listed on CITES.

Humidity

30–50 %

Generally dry conditions typical of arid habitats. Permanently provide a humid hide (sphagnum/peat) to aid shedding; occasionally raise the humidity during the shed period.

Substrate

AspenCompacted sand/soil mixNewspaper / paper towel (quarantine)

Avoid fine loose sand used alone (risk of impaction if ingested during feeding). A slightly compacted sand/soil mix better reproduces the natural environment. Paper is preferable during quarantine or medical observation.

UVB

Recommended

Low to moderate UVB recommended (UV index ~1-3, desert type), beneficial for this partly diurnal species in spring/autumn. Provide shaded and refuge areas.

Water source

Always available

Clean water available at all times in a heavy, stable bowl, renewed regularly. The bowl also occasionally serves for hydration and to aid shedding.

Origin

Viperidae

Southwestern United States (Arizona, New Mexico, Texas, southern California, Oklahoma, Arkansas) and northern/central Mexico. Arid habitats: deserts, semi-deserts, dry grasslands, rocky scrubland and brushy areas.

Feeding & health

Diet

Carnivore — Rodents (mice, rats), small rabbits, occasional birds

Ambush predator. In captivity, feed appropriately sized thawed (frozen/thawed) prey. Adults fed every 1-2 weeks, juveniles more often. Watch its body condition: a sedentary species prone to obesity. Feed with long tongs, at a safe distance.

Breeding

Viviparous

Breeding is generally triggered by a winter brumation cycle. Gestation of several months; the female gives birth to 10 to 25 neonates that are already venomous and independent. Handle newborns with the same precautions as adults.

Health watch points

Respiratory infections (often linked to unsuitable humidity or temperature)
Stomatitis (mouth rot)
Dysecdysis (incomplete sheds, retention at the rattle)
Mites (Ophionyssus) and internal parasites, especially in wild-caught individuals
Obesity and hepatic lipidosis linked to sedentariness and overfeeding

Morphs & genetics

Registry of 4 documented genes and 1 named combos for Western Diamondback Rattlesnake.

Albino (T-) amelanisticRec
Patternless / Edgeless stark lineRec
Melanistic blackRec
Leucistic (Rare) whiteRec

Named combos — 1 documented combined morphs

Albino Patternless

Pairing calculator

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

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Western Diamondback Rattlesnake × Western Diamondback Rattlesnake

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 western diamondback rattlesnake.

Is this snake dangerous to humans?▾

Yes, unambiguously: the Western diamondback rattlesnake is a venomous species whose potent hemotoxic venom can cause major tissue destruction, swelling and internal bleeding, with a genuine risk to life. Keeping one is reserved for experienced, licensed keepers, and all handling must be done exclusively with a hook and tongs, never with bare hands.

Is a special permit needed to keep one?▾

Yes: keeping a venomous snake like this one is regulated and generally requires an official permit — in France, a certificate of competence and an establishment-opening authorisation. Also prepare a safety protocol including the location of antivenom and the contact details of a poison-control centre, even before acquiring the animal.

How big does an adult Western diamondback rattlesnake get?▾

It's a massive snake: most adults measure between 120 and 150 cm, but some records exceed 210 cm. It is recognisable by its diamond-shaped dorsal pattern and its tail ringed with black and white bands of equal width, just before the rattle, which earns it the nickname 'coon tail'.

What terrarium and safety measures are essential?▾

Provide a sturdy terrestrial terrarium at least 150 cm long, 60 cm wide and 45 cm high, with a lockable closure clearly labelled 'venomous animal'. Since the species is essentially ground-dwelling, floor area takes priority over height; a hatch or shift-box system allows it to be handled at a distance without direct contact.

How should temperature and the basking spot be managed?▾

This desert-dwelling, heliophilic species needs a genuine sunbathing spot: a basking spot between 32 and 35°C, a general warm side of 29 to 32°C and a cool side of 24 to 27°C, with a nighttime drop down to 18-20°C. A winter brumation period of 6 to 10 weeks at 12-16°C is also beneficial, particularly to stimulate breeding.

Which substrate should be chosen, and which one avoided?▾

Aspen or a lightly compacted sand-and-soil mix reproduces the natural environment well; newspaper remains preferable during quarantine or medical observation. Avoid, however, fine loose sand used on its own, which carries a risk of impaction if the animal ingests some during a meal.

How often, and with what, should this rattlesnake be fed?▾

Its diet consists of rodents (mice, rats), small rabbits and occasionally birds, always offered thawed and presented with long tongs for safety. Adults are fed every 1 to 2 weeks; watch for excess weight, as this is a sedentary species particularly prone to obesity in captivity.

What is this species' life expectancy in captivity?▾

A Western diamondback rattlesnake commonly lives between 15 and 20 years in captivity, with some individuals even exceeding 20 to 25 years under good conditions. This is therefore a commitment spanning several decades to plan for before acquiring one.

How does reproduction happen in this species?▾

It is generally triggered by a winter brumation cycle. After several months of gestation, the female gives birth to 10 to 25 young that are already venomous and fully independent from birth, to be handled with the same precautions as an adult.

What are the main health problems seen in this rattlesnake?▾

The most common issues are respiratory infections linked to poorly adjusted humidity or temperature, stomatitis (mouth rot), incomplete sheds sometimes affecting the rattle, as well as mites and internal parasites in wild-caught individuals. Overfeeding can also lead to obesity with hepatic lipidosis.

Does this species need UVB lighting?▾

Low to moderate UVB, with a desert-type UV index of about 1 to 3, is recommended and benefits this partly diurnal species in spring and autumn. Even so, provide shaded areas and hides so it can regulate its own exposure.

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