Species profile · Colubridae

Bogertophis subocularis

Complete care sheet and morph genetics registry for the trans-pecos ratsnake — husbandry parameters, diet, breeding and pairing calculator.

Trans-Pecos Rat SnakeSubocH-SnakeSerpent ratier du Trans-PecosTrans-Pecos Kletternatter
Adult size
1.1–1.7 m
Lifespan
15–25 yrs
Difficulty
Beginner +
Temperament
Nocturnal
Activity
Nocturnal
Reproduction
Oviparous
01

Husbandry requirements

Trans-Pecos Ratsnake — origin: South-western North America: the Trans-Pecos region (western Texas, southern New Mexico) and northern Mexico (Coahuila, Chihuahua, Nuevo León). Inhabits the Chihuahuan Desert, in arid to semi-arid rocky habitats (limestone outcrops, scree, canyons)..

Terrarium temperature gradient

Night min18 °C
Cool side22–25 °C
Warm side28–31 °C

A daytime thermal gradient is essential. A nocturnal desert species: NO bright heliophilic-type basking spot is necessary; heat via a heat mat or cable regulated by a thermostat, possibly supplemented with a weak spot. Natural night-time drop down to ~18-20 °C is well tolerated. Never exceed ~32 °C at the hot spot.

Enclosure (adult)
120 × 60 × 60 cm

A secured horizontal terrarium / vivarium, with climbing areas

Minimum for an adult; larger is preferable. An excellent escape artist: lid and openings perfectly locked. A saxicolous, semi-climbing species: provide branches, cork and STABLE rock stacks (wedged against the floor, never placed on the substrate to avoid any crushing), plus at least two hides (warm side and cool side).

Humidity
30–50 %

A dry, well-ventilated environment. Provide a humid box (moss/moistened sphagnum) during shedding periods to prevent dysecdysis.

Substrate
Aspen shavingsCompacted desert earth/sand substratePaper towel (quarantine / health monitoring)

Dry substrate, low in dust and free of irritating sharp edges. Avoid pure fine sand (risk of impaction if ingested). Feeding in a bowl or off the substrate limits accidental ingestion.

UVB
Optional

Not essential (nocturnal species). A low-intensity UVB (UVI ~1-2, low-power T5 tube) remains beneficial for rhythm and metabolism; provide shaded hides.

Water source
Always available

A bowl of clean water at all times, refreshed regularly; also used for hydration before shedding. A container heavy enough not to be tipped over.

Origin
Colubridae

South-western North America: the Trans-Pecos region (western Texas, southern New Mexico) and northern Mexico (Coahuila, Chihuahua, Nuevo León). Inhabits the Chihuahuan Desert, in arid to semi-arid rocky habitats (limestone outcrops, scree, canyons).

02

Feeding & health

Diet

Strict carnivore (rodents) — Mice and small rats of suitable size (prey width ≈ body width), served thawed/warmed

In the wild it eats rodents and occasionally bats caught in caves. In captivity: frozen-thawed prey. Adults fed every 7-14 days; avoid overfeeding (risk of obesity). Nocturnal snakes: feeding in the evening improves feeding response.

Breeding
Oviparous

Clutch 4–12 eggs/young. Maturity at around 2-3 years. Breeding is generally triggered by a cool winter brumation (~12-16 °C, 6-10 weeks). Lays relatively large eggs; incubation at ~27-28 °C for about 70-90 days. Non-CITES; most often captive-bred (many selected phenotypes).

Health watch points
  • Respiratory infections (unsuitable temperature or ventilation, environment too humid)
  • Incomplete shed / dysecdysis due to a lack of a humid spot
  • Obesity linked to overfeeding
  • Regurgitation (post-meal handling or temperature too low)
  • External (mites) and internal parasites
03

Morphs & genetics

Registry of 3 documented genes and 2 named combos for Trans-Pecos Ratsnake.

  • Blonde (Pandale Line) pandale phaseRec
  • Axanthic (Silver) silverRec
  • HypomelanisticRec
Named combos — 2 documented combined morphs
Silver Blonde (Ghost)Snow (Théorique)
04

Pairing calculator

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

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Trans-Pecos Ratsnake × Trans-Pecos Ratsnake

Probabilities per gene (independent loci).

GeneParent AParent B
Expected clutchSelect at least one gene on a parent.
05

Frequently asked questions

Answers to the most common questions about keeping the trans-pecos ratsnake.

How big does an adult Trans-Pecos Ratsnake get?
An adult Trans-Pecos Ratsnake typically measures 1.1–1.7 m (total adult length. most adults measure 120-150 cm; some individuals reach ~170 cm. slender build.).
What temperature and humidity does a Trans-Pecos Ratsnake need?
A gradient of roughly 22–25 °C on the cool side to 28–31 °C on the warm side. Humidity 30–50 %.
What does a Trans-Pecos Ratsnake eat?
Strict carnivore (rodents): Mice and small rats of suitable size (prey width ≈ body width), served thawed/warmed.
Is the Trans-Pecos Ratsnake a good reptile for beginners?
Beginner + level. A NON-VENOMOUS species, generally calm and placid. Rarely bites but may vibrate its tail and bluff if disturbed by day; some individuals remain nervous and fast. Being nocturnal, it is best handled in the evening. A good feeder and hardy, which makes it an accessible colubrid. Plan ahead: a lifespan of 15–25 yrs.

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