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Western Bush Viper
Atheris chlorechis
A venomous arboreal viper native to the lush West African rainforests, beautifully characterized by its vibrant leaf-green coloration adorned with small, bright yellow speckles.
- Taxonomy
- Class:SquamataOrder:SquamataFamily:ViperidaeSubfamily:ViperinaeGenus:AtherisSpecies:Atheris chlorechis
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Environment
Terrestrial
Humidity
60 - 80 %
Day temperature
24 - 28 °C
Night temperature
20 - 22 °C
Adult size
65 cm
UVB
Low - Medium
Species description
Geographical Origin and Habitat: Atheris chlorechis is native to the forested regions of West Africa, ranging through Guinea, Sierra Leone, Liberia, Ivory Coast, Ghana, Togo, Benin, and Nigeria. It inhabits primary and secondary tropical rainforests, occupying tree canopies, dense vines, and shrubs near rivers.
Taxonomy and Genetics: A member of the family Viperidae and the genus Atheris. Historically confused with other green bush vipers, it is now recognized as a distinct West African species characterized by specific midbody scale rows and cephalic scalation. Its genetics reflect adaptation to humid, lowland forests.
Behavior and Habits: Nocturnal and arboreal. It spends daytime hours resting in foliage, blending in as a green leaf. At night, it hunts small rodents, frogs, and lizards using an ambush strategy. It is venomous, possessing a hemotoxic venom that requires medical attention if a bite occurs. Generally non-aggressive but strikes fast.
Morphology: Adults average 50-70 cm in length. The head is flat, triangular, and distinct from the neck. The body is covered with strongly keeled scales. The coloration is light green to yellowish-green with small, scattered yellow spots on the back. Juveniles are born with an olive-brown coloration that shifts as they mature.
Care, breeding and tankmates
Terrarium Setup: A vertical terrarium of at least 60x40x60 cm is required. Furnish the enclosure with climbing branches, natural vines, and dense foliage to allow for climbing and shelter. The substrate should consist of organic soil, cypress mulch, or coco coir to assist with moisture retention.
Lighting and Heating: Keep daytime temperatures between 25°C and 28°C, with a localized basking spot of 31°C using a protected heat lamp. Nighttime temperatures should drop to 20-22°C. A 5% UVB lamp is recommended for 10-12 hours daily to simulate filtered sunlight through the rainforest canopy.
Humidity and Hydration: Maintain high humidity levels between 70% and 80%. Spray the terrarium daily with warm, clean water, preferably in the evening. Vipers drink droplets from leaves rather than from a bowl. Ensure proper cross-ventilation to prevent mold and stagnant air.
Feeding and Supplementation: Carnivorous. Feed appropriately sized frozen-thawed mice using long feeding forceps. Neonates may occasionally require scenting or small frogs to start feeding. Dust prey with calcium and vitamin D3 supplements once a month for adults.
Compatibility: Strictly solitary. Do not house together. The enclosure must have a secure lock and be clearly labeled as venomous. Use standard venomous snake handling tools such as hooks and safety containers during maintenance. Do not handle directly.
Health and Common Diseases: Dehydration is a major risk if spraying is neglected. Stagnant air combined with high humidity can cause respiratory infections. Scale rot or blister disease can occur if the substrate remains too wet. Consult a veterinarian specializing in venomous reptiles.
Geographic Origin and Distribution
Atheris chlorechis is native to the forested regions of West Africa, ranging through Guinea, Sierra Leone, Liberia, Ivory Coast, Ghana, Togo, Benin, and Nigeria. It inhabits primary and secondary tropical rainforests, occupying tree canopies, dense vines, and shrubs near rivers.
Origin
Africa and Madagascar
Reptile profile
- Diet
- Carnivore
- These vipers are ambush predators that feed mainly on small mammals, frogs, and lizards in the wild. In captivity, they can usually be transitioned to a diet of appropriately sized rodents, such as mice or small rats. Feeding should occur every one to two weeks depending on the age and size of the snake.
- Adult size
- 65 cm
- The catalog's scalar value is 65 cm. The ReptTraits v1.2 source reports a maximum adult measurement of 70 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.
- Lifestyle/Microhabitat
- Arboreal
- Arboreal species spend the majority of their lives in trees and shrubs, requiring vertically oriented enclosures with climbing branches. Terrestrial species need ample floor space with hiding spots among the leaf litter. Both require specific temperature and humidity gradients to thrive.
- Activity cycle
- Nocturnal
- These snakes are primarily nocturnal or crepuscular, becoming most active during the evening and night. During the day, they often rest coiled on branches or concealed in vegetation. Their activity levels can increase significantly after a period of rain or during the breeding season.
- Sociality
- Gregarious
- They are typically ambush hunters, relying on their camouflage to remain undetected by both prey and predators. When threatened, they may adopt a defensive posture, hiss, or strike rapidly. They are generally not aggressive but will defend themselves fiercely if provoked.
- Reproduction
- Ovoviviparous
- Most of these species are viviparous, giving birth to live young after a gestation period of several months. The neonates are fully independent and venomous from birth. Breeding often requires a cooling period or specific environmental cues to simulate natural seasonal changes.
- Handling tolerance
- Display only
- Handling must be strictly avoided except when absolutely necessary for husbandry or medical reasons. Always use appropriate tools such as snake hooks or tongs to move the animal safely. These are highly venomous species, and a bite can result in severe medical consequences.
- Brumation
- Not required
- Depending on their natural range, some may undergo a mild winter cooling period to stimulate breeding. This is not a deep brumation but rather a slight drop in temperature accompanied by reduced feeding. Tropical species may not require any significant seasonal changes in captivity.
- Molting
- Periodic
- Shedding occurs periodically as the snake grows, heralded by the eyes turning a milky blue color. During this time, they should be left undisturbed and humidity should be slightly increased to facilitate a clean shed. A healthy snake will shed its skin in one complete, unbroken piece.
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
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