Bella Rat Snake — Care Sheet & Morphs

Husbandry requirements

Bella Rat Snake — origin: Mountain forests of South-East and southern Asia: southern China (Yunnan, Sichuan), northern Myanmar, northern Vietnam and north-eastern India, generally at high elevations..

Terrarium temperature gradient

Night min16 °C

Cool side18–22 °C

Warm side24–27 °C

A MOUNTAIN species: it tolerates heat poorly. Do not exceed a moderate temperature at the warmest spot. A gentle heat mat controlled by a thermostat is enough; no intense bright basking spot is needed. A night-time drop and a winter cooling (a few weeks cooler) are beneficial and often essential for breeding. Overheating is a frequent cause of stress and mortality.

Enclosure (adult)

90 × 45 × 45 cm

A well-ventilated terrestrial terrarium with a tightly sealed closure (a skilful escaper), with a deep substrate for burrowing and multiple hides.

A terrarium with the recommended minimum dimensions suits an adult; prioritise floor space over height. This secretive species needs at least two snug hides (warm side and cool side), plus bark and leaf litter to feel secure; otherwise it stays stressed and refuses to feed.

Humidity

55–75 %

A moderately humid mountain-forest atmosphere. Keep the substrate slightly moist at depth without soaking the surface. A humid hide (moss/sphagnum) aids shedding. Provide enough ventilation to avoid stagnant air and respiratory infections.

Substrate

Coconut fibreFertiliser- and pesticide-free soilLeaf litter (oak/beech)Cypress shavings

Provide a deep layer, as the species is semi-burrowing and spends much time buried. Keep the bottom slightly moist and the surface drier. Avoid dusty or resinous substrates (pine) and do not use overly dry shavings.

UVB

Optional

Not essential for this crepuscular/nocturnal species. A low-intensity UVB (low UV index, a diffused low-output tube) remains beneficial if offered alongside plentiful shaded areas; avoid any strong lighting that would stress it.

Water source

Always available

A large bowl of clean water available at all times, refreshed often; it also contributes to humidity. The animal may soak in it, notably before shedding.

Origin

Colubridae

Mountain forests of South-East and southern Asia: southern China (Yunnan, Sichuan), northern Myanmar, northern Vietnam and north-eastern India, generally at high elevations.

Feeding & health

Diet

Carnivore (rodent-eater, with a snake-/lizard-eating component in the wild). — Pinky mice and appropriately sized small rodents; in the wild it also eats reptile eggs and small lizards.

Small species: slim prey, never wider than the thickest part of the body. Feed roughly once a week. Wild-caught individuals often refuse rodents at first and may take only lizards; patient transition work (prey scented with lizard, presented at night, inside the hide) is frequently necessary.

Breeding

Oviparous

Clutch 3–8 eggs/young. Captive breeding is rare and poorly documented. A winter cooling (a light brumation of several weeks) is generally needed to trigger the cycle. Eggs are incubated at a warm temperature. Clutch size is estimated by comparison with related colubrids; real data are very limited.

Health watch points

Internal parasites (nematodes, protozoa) very common in wild-caught animals
External parasites (snake mites, ticks) on import
Respiratory infections linked to excessive heat or stagnant air
Feeding refusal, dehydration and stress-related weight loss (especially unacclimatised wild specimens)
Difficult shedding (dysecdysis) when humidity is inadequate

Morphs & genetics

Registry of 2 documented genes for Bella Rat Snake.

Amelanistic (Hypothetical) albinoRec
Anerythristic (Hypothetical) aneryRec

Pairing calculator

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

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Bella Rat Snake × Bella Rat Snake

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 bella rat snake.

Is the Bella Rat Snake suitable for a beginner?▾

No, its care level is classed as advanced. It is a secretive and shy species, often hidden and burrowing, generally docile once acclimatised but nervous and easily stressed, especially in wild-caught specimens. It requires prior experience with delicate colubrids.

How big does this species get?▾

It is a small, slender snake, most often measuring 70 to 90 cm in total length as an adult, exceptionally approaching 100 cm.

What kind of terrarium does it need?▾

A well-ventilated, tightly sealed terrestrial terrarium (it is a skilful escape artist) of around 90 x 45 x 45 cm is enough, prioritising floor space over height. This species needs a deep substrate for burrowing, at least two snug hides (a warm side and a cool side), bark and leaf litter; without these it stays stressed and refuses to feed.

Why must temperatures stay low?▾

This is a mountain species, living between 1000 and 2500 m elevation, that tolerates heat poorly: the warmest spot should not exceed 27-28 °C, with a cool side at 18-22 °C. A simple thermostat-controlled heat mat is enough, with no intense bright basking spot, since overheating is a frequent cause of stress and mortality.

Should temperatures drop at night and in winter?▾

Yes, a night-time drop to 14-18 °C is beneficial, as is a winter cooling of a few weeks at 12-16 °C, often essential for breeding. These variations reproduce the cool climate of its native mountain forests.

What humidity level and substrate should be provided?▾

A moderately humid mountain-forest atmosphere is needed, 55 to 75%, with a substrate slightly moist at depth and drier at the surface. As the species is semi-burrowing and spends a lot of time buried, provide a deep layer of at least 8 to 12 cm (coconut fibre, fertiliser-free soil, oak or beech leaf litter) and a humid hide to aid shedding.

What does the Bella Rat Snake eat?▾

It is a carnivore that is essentially a rodent-eater, fed pinky mice and appropriately sized small rodents, never wider than the thickest part of the body, every 7 to 10 days. In the wild it also eats reptile eggs and small lizards.

Why do some individuals refuse to eat?▾

Wild-caught individuals often refuse rodents at first and may take only lizards. Patient transition work is frequently necessary: prey scented with lizard odour, presented at night and left in the hide to reassure the animal.

Is UVB useful for this species?▾

UVB is not essential for this crepuscular-to-nocturnal snake. Low-intensity lighting (index 5, a dimmed T5-type tube) remains beneficial if offered alongside plentiful shaded areas; however, any strong lighting should be avoided, as it would stress the animal.

How does it reproduce?▾

It is oviparous and reportedly lays 3 to 8 eggs, but captive breeding remains rare and poorly documented. A winter cooling of several weeks is generally needed to trigger the cycle, with eggs incubated at around 24 to 26 °C. Clutch size is estimated by comparison with related colubrids, as precise data are lacking.

What is its lifespan?▾

It is poorly documented for this species: it is estimated at 10-18 years by extrapolation from comparable colubrids. As many individuals are wild-caught, survival during the first months of acclimatisation is the main limiting factor.

What health problems should be monitored?▾

Wild-caught animals very frequently present internal parasites (nematodes, protozoa) and external parasites (mites, ticks) on import. Also watch for respiratory infections linked to excessive heat or stagnant air, feeding refusal with dehydration and stress-related weight loss, and difficult sheds when humidity is inadequate.

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