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Rainbow boa
Epicrates cenchria
The Brazilian rainbow boa features spectacular iridescent scales. Requires a 120x60x60 cm terrarium with a deep, moisture-retaining substrate to maintain near-constant high humidity without molding, alongside precise heating.
Class:Squamata
Order:Squamata
Family:Boidae
Subfamily:Boinae
Genus:Epicrates
Species:Epicrates cenchria
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Environment
Terrestrial
Humidity
80 - 99 %
Day temperature
24 - 28 °C
Ambient temperature
26 °C
Night temperature
21 - 22 °C
Basking spot
29 - 30 °C
Adult size
220 cm
Minimum enclosure
>= 350 L
UVB
Low
Species description
Geographical Origin and Habitat: Epicrates cenchria is native to South America, widely distributed throughout the Amazon River basin. It is found in Brazil, Venezuela, Colombia, Peru, Bolivia, and the Guianas. It primarily inhabits warm, humid primary and secondary tropical rainforests, but can also adapt to wooded savannas and riparian zones along rivers. It is a terrestrial to semi-arboreal snake, using leaf litter, fallen logs, and low branches for hunting and cover.
Taxonomy and Genetics: Belonging to the family Boidae, genus Epicrates. Described by Linnaeus in 1758, this species historically included several subspecies, the most famous being Epicrates cenchria cenchria (the Brazilian rainbow boa). Modern genetic studies have elevated some subspecies to full species status (e.g., Epicrates maurus). Its genome reflects adaptations for nocturnal vision and thermal sensing.
Behavior and Habits: Exhibits nocturnal and crepuscular habits. During the day, it stays hidden in humid shelters, under logs, or in burrows. It is a calm and generally docile snake as an adult if handled gently, though juveniles are known to be defensive and quick to bite. It uses constriction to capture small mammals and birds in the dark.
Morphology: Typically reaches an adult length of 150 to 200 centimeters. The body is slender and muscular, with a distinct head and large eyes. The most famous feature is the intense iridescence of its scales, which reflect light into a rainbow spectrum due to microscopic ridges on their surface acting as prisms. The base color is orange-red with black dorsal rings and dark lateral spots.
Care, breeding and tankmates
Terrarium Setup: An adult specimen requires a terrarium measuring at least 120x60x60 cm. The substrate must retain moisture without molding; a mixture of peat moss, coconut fiber, and sphagnum moss to a depth of 5-8 cm is recommended. Provide stout climbing branches, artificial or live plants for cover, and at least two large hides, one in the warm end and one in the cool end.
Lighting and Heating: A horizontal thermal gradient is essential. The warm side should be maintained at 29-30°C (never exceed 32°C, as high heat is quickly fatal), while the cool side should remain at 24-25°C. Nighttime temperatures can drop to 21-22°C. While UVB is not strictly mandatory, a 5% UVB lamp is beneficial for behavior and health.
Humidity and Hydration: Humidity is the most critical parameter: it must be kept between 70% and 85% for adults, and above 90% for neonates. Low humidity will lead to severe dehydration and shedding issues. Daily misting is required, and a large water bowl that the snake can submerge its entire body in must be kept in the cool zone and cleaned regularly.
Feeding and Supplementation: In captivity, they feed on appropriately sized rodents (frozen-thawed mice or rats), offered using tongs once every 10-14 days for adults and every 7-10 days for juveniles. Routine supplementation is not required if feeding high-quality prey, but prey can be dusted with calcium once a month. Do not handle the snake for 48 hours after feeding.
Compatibility: Strictly solitary. Do not house multiple specimens together, as this causes stress, competition for hides, and risk of accidental injury or unplanned breeding. They are highly compatible with intermediate keepers who are committed to maintaining the high humidity levels they require.
Health and Common Diseases: Highly susceptible to respiratory infections (pneumonia) from cold drafts or stagnant air. Retained sheds (especially eye caps) are caused by low humidity. Scale rot can occur if the substrate is kept soaking wet or soiled. Regular spot cleaning and periodic deep cleaning with reptile-safe disinfectants are required.
Geographic Origin and Distribution
Epicrates cenchria is native to South America, widely distributed throughout the Amazon River basin. It is found in Brazil, Venezuela, Colombia, Peru, Bolivia, and the Guianas. It primarily inhabits warm, humid primary and secondary tropical rainforests, but can also adapt to wooded savannas and riparian zones along rivers. It is a terrestrial to semi-arboreal snake, using leaf litter, fallen logs, and low branches for hunting and cover.
Origin
Amazon, Orinoco, and Guianas
Reptile profile
- Diet
- No verified data available
- Life expectancy
- No verified data available
- Adult size
- 220 cm
- Lifestyle/Microhabitat
- No verified data available
- Activity cycle
- No verified data available
- Sociality
- No verified data available
- Reproduction
- No verified data available
- Handling tolerance
- No verified data available
- Brumation
- No verified data available
- Molting
- No verified data available
The catalog's scalar value is 220 cm. The ReptTraits v1.2 source reports a maximum adult measurement of 220 cm for this species, recorded as total length (TL). These figures are not interchangeable: the first is the profile's editorial reference, whereas the second is a published maximum under a specific measurement convention; differences among sources can reflect sex, population, life stage and measuring method.
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
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