Colombian Rainbow Boa (CRB)

Epicrates maurus
Morph: Het Leucistic

Species Overview

• Size: Colombian rainbow boas are generally 4–6 feet (1.2–1.8 m) as adults, with females tending toward the larger end. They are more slender than Brazilian rainbow boas.

• Appearance: As a heterozygous (het) leucistic, these boas appear normal in outward appearance, typically showing the natural brown to tan ground colour with darker saddles and subtle iridescence. No visual leucism is expressed unless paired with another leucistic gene carrier.

• Distribution: Native to northern South America, primarily Colombia and nearby regions.

• Habitat: Found in humid tropical forests, savannahs, and near rivers, with seasonal humidity and temperature fluctuations.

• Behaviour: Nocturnal ambush predators that feed on small mammals, birds, and reptiles. Juveniles may climb more frequently, while adults are primarily terrestrial.

Captive Care

• Enclosure: A 4′ × 2′ × 2′ enclosure suits most adults, with secure hides, cork bark, climbing branches, and foliage. Naturalistic or bioactive setups help maintain humidity.

• Temperature & Humidity: Maintain an ambient gradient of 78–82°F (25–28°C), with a basking area of 86–88°F (30–31°C). Nighttime drops to 74–76°F (23–24°C) are acceptable. Humidity should be kept 70–85%, with regular misting and a large water bowl to support hydration and proper shedding.

• Diet: Juveniles feed every 7–10 days on small rodents; adults every 14–21 days. Feed appropriately sized prey to maintain proper body condition.

• Behaviour in Captivity: These boas are hardy once established and generally adapt well to captivity. Juveniles may be defensive but usually mellow with handling.

• Special Considerations: While morphs alter appearance, their core care requirements remain identical to standard Colombian rainbow boas.

Genetics Note

The Het Leucistic Colombian Rainbow Boa involves:

• Leucism (recessive, not expressed): Carried in a single copy, meaning the animal does not visually express leucism but can produce leucistic offspring if bred with another leucistic or het leucistic boa.

• Visual Appearance: Hets typically resemble normal CRBs, with no outward indication of the gene.