Tiger rat snake — Care Sheet & Morphs

Husbandry requirements

Tiger rat snake — origin: Neotropical America: from southern Mexico across Central America into South America (as far as northern Argentina), as well as Trinidad and Tobago. Occupies humid tropical forests, forest edges and riparian zones of low and medium altitude..

Terrarium temperature gradient

Night min22 °C

Cool side24–27 °C

Warm side29–32 °C

Basking spot32–35 °C

A diurnal, heliophilic snake that thermoregulates actively: provide a genuine basking hot spot (32-35 °C) under a source protected by an anti-burn mesh, with a strong thermal gradient. Natural night-time drop tolerated down to ~22 °C.

Enclosure (adult)

180 × 90 × 120 cm

Large, tall arboreal terrarium, very well ventilated, with solid branches, platforms and hides both up high and at ground level.

A large, fast, semi-arboreal species: favour volume and height. These dimensions are an adult minimum; larger is always preferable. Perfectly secured closures (an excellent escape artist). Provide dense foliage to reduce the stress of an often skittish animal.

Humidity

60–80 %

Tropical conditions: maintain 60-70% during the day, with peaks up to ~80% (particularly during shedding). Ensure good ventilation to avoid stagnant humid air and respiratory infections.

Substrate

Coco fibreSoil/coco mixOrchid barkCypress mulch

Moisture-retaining substrates, at a sufficient depth; keep a surface layer that is not too waterlogged to prevent dermatitis and rot of the ventral scales.

UVB

Recommended

Recommended for this diurnal snake: low to moderate UVB (Ferguson zone 2-3, e.g. T5 tube 5-7%) placed above the basking spot, with shaded areas. Beneficial for well-being and vitamin D3 metabolism, even if not strictly essential.

Water source

Always available

A large container of clean water, stable and renewed regularly, wide enough to allow hydration and an occasional soak. Contributes to maintaining humidity.

Origin

Colubridae

Neotropical America: from southern Mexico across Central America into South America (as far as northern Argentina), as well as Trinidad and Tobago. Occupies humid tropical forests, forest edges and riparian zones of low and medium altitude.

Feeding & health

Diet

Opportunistic carnivore — Birds, eggs, rodents, lizards, bats and amphibians.

High metabolism and a very active animal: feed more frequently than heavy constrictors (appropriately sized prey, more closely spaced for juveniles/subadults). Whole thawed prey. Warning: many specimens in the trade are wild-caught (often parasitised, stressed, difficult to start feeding); a captive-bred individual is strongly preferable.

Breeding

Oviparous

Clutch 5–15 eggs/young. Egg-laying is generally preceded by a seasonal cycle (variation in photoperiod, temperature and humidity). Incubation of about 70-90 days around 27-29 °C. Captive breeding is still poorly documented and uncommon.

Health watch points

Internal and external parasitoses (nematodes, coccidia, mites), very common in wild-caught individuals
Respiratory infections (unsuitable humidity/temperature parameters or ventilation)
Abrasions and wounds of the snout (rostrum) from rubbing against the walls in stressed or nervous individuals
Dysecdysis (difficult shedding) linked to insufficient humidity
Stomatitis (mouth rot) and food refusal of stress-related origin

Morphs & genetics

Registry of 2 documented genes for Tiger rat snake.

Axanthic (Hypothetical) aneryRec
Hypomelanistic (Hypothetical) hypoRec

Pairing calculator

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

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Tiger rat snake × Tiger 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 tiger rat snake.

What is the adult size of the tiger rat snake?▾

It is a large colubrid, generally measuring between 200 and 275 cm, with the largest specimens approaching 3 metres. Its body is very slender but remains muscular and athletic.

What terrarium does it need?▾

You need to provide a large, tall arboreal terrarium of at least 180x90x120 cm, very well ventilated, with sturdy branches, platforms and hides both up high and on the ground. The closures must be perfectly secured, as it is an excellent escape artist, and dense foliage helps reduce the stress of this often skittish animal.

Is this snake dangerous to handle?▾

It is not venomous, but remains defensive, alert and very quick: when threatened, it compresses its neck laterally to appear larger, hisses loudly and may bite, a bite from a large specimen being painful. Regular, calm handling can make it more tolerant over time, but it remains a nervous snake to be reserved for experienced keepers.

How should the thermal gradient of its terrarium be organised?▾

This diurnal, heliophilic snake thermoregulates actively: you must offer it a genuine basking spot between 32 and 35°C under a source protected by an anti-burn mesh, a warm side around 29-32°C, a cool side of 24-27°C, and a night-time drop tolerated down to about 22°C.

Does it need UVB lighting in its terrarium?▾

It is recommended for this diurnal species: low to moderate UVB, Ferguson zone 2-3, for example a T5 5-7% tube, placed above the basking spot with shaded areas, supports its wellbeing and vitamin D3 metabolism, even though it is not strictly compulsory.

What humidity level and substrate should be set up?▾

The environment should stay tropical, with 60 to 70% humidity during the day and peaks up to 80% during shedding. Moisture-retaining substrates such as coco fibre, a soil/coco mix or orchid bark work well, provided the surface is not kept too soaked, which would encourage dermatitis.

What does the tiger rat snake eat and how often?▾

It is an opportunistic carnivore that hunts birds, eggs, rodents, lizards and bats in the wild. Its high metabolism and considerable activity mean it must be fed more frequently than heavy constrictors, with thawed whole prey of appropriate size, more closely spaced for juveniles.

What life expectancy should be expected for this snake?▾

The tiger rat snake generally lives between 15 and 20 years, which represents a commitment of several years to weigh up carefully before acquisition.

Where does this species come from and what is its natural behaviour?▾

It is native to the Neotropics, from southern Mexico to northern Argentina by way of Central America and Trinidad and Tobago, where it frequents humid tropical forests and riparian zones. It is a diurnal snake, very visual and active, that explores its environment a great deal in search of prey.

How does the tiger rat snake reproduce?▾

It is an oviparous species: the female lays 5 to 15 eggs, generally after a seasonal cycle marked by variations in photoperiod, temperature and humidity. Incubation lasts about 70 to 90 days at around 27-29°C, and captive breeding remains poorly documented in this species.

Can this species be recommended to a beginner keeper?▾

No, it is rather classified among advanced-level species. Its liveliness, defensive temperament and imposing size make it a snake better suited to a keeper who already has experience with large colubrids.

What are the most common ailments in this species?▾

Internal and external parasitic infections are frequent, especially in wild-caught specimens, as are respiratory infections when humidity or ventilation are poorly adjusted. Stressed animals can develop snout abrasions from rubbing against the walls, as well as difficult shedding or food refusal.

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