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Rainforest Hognosed Pitviper
Porthidium nasutum
The rainforest hognosed pitviper (Porthidium nasutum) is a small venomous snake native to Central and northern South America, named for its upturned snout.
Class:Squamata
Order:Squamata
Family:Viperidae
Subfamily:Crotalinae
Genus:Porthidium
Species:Porthidium nasutum
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Environment
Terrestrial
Humidity
75 - 90 %
Day temperature
22 - 28 °C
Ambient temperature
22 - 28 °C
Night temperature
22 - 24 °C
Basking spot
28 °C
Adult size
63.5 cm
Minimum enclosure
>= 80 L
UVB
Low
Species description
Geographical Origin and Habitat: This species is widely distributed throughout the tropical humid lowland rainforests of southern Mexico, extending through Central America (including Belize, Guatemala, Honduras, Nicaragua, Costa Rica, and Panama) to northern South America, specifically coastal Colombia and Ecuador. It predominantly dwells in the leaf litter of the forest floor, relying on the high ambient humidity and shade provided by the dense canopy.
Taxonomy and Genetics: Porthidium nasutum is classified under the family Viperidae, subfamily Crotalinae (pit vipers). The genus Porthidium contains small, terrestrially adapted pit vipers characterized by cryptic coloration. Genetic studies focus on the molecular makeup of its venom, which contains proteins of interest for biomedical research. No subspecies are currently recognized.
Behavior and Habits: It is a terrestrial, solitary, and largely nocturnal or crepuscular predator. During the day, it remains completely stationary on the ground, blending seamlessly with dry leaves and root systems to ambush small vertebrates like lizards, frogs, and rodents. It is a docile but venomous snake, relying on camouflage for defense and only biting when directly threatened or trodden upon.
Morphology: The most prominent morphological feature of this snake is its distinctively upturned snout, formed by an elongated rostral scale that mimics a curled leaf. The body is short and stout, with adults averaging between 30 and 40 cm, rarely exceeding 55 cm. The head is large, triangular, and distinct from the neck. Coloration consists of a grey, brown, or gold background with dark rectangular blotches.
Care, breeding and tankmates
Terrarium Setup: Requires an escape-proof, securely locked enclosure of at least 60x40x40 cm (about 20 gallons) for an adult. The substrate should consist of coconut fiber, peat moss, or cypress mulch, covered with a thick layer of sterilized leaf litter to encourage natural camouflaging behaviors. Provide multiple tight, dark hiding spots like hollow cork bark, humid hide boxes, and fake plants to reduce stress.
Lighting and Heating: Being nocturnal, it does not require intense lighting. A simple 12-hour light cycle using low-intensity LEDs is sufficient. Heating must provide a distinct thermal gradient: maintain ambient temperatures between 24°C and 27°C, with a localized basking spot of 28°C created by a regulated heat mat or deep heat projector. Nighttime temperatures can drop to 21-22°C. A low-output UVB bulb (2-5%) is recommended for physiological health.
Humidity and Hydration: High humidity is essential, ideally between 75% and 90%. Mist the enclosure daily with purified or RO water to maintain humidity without saturating the substrate. A sturdy, heavy water bowl filled with fresh, clean water must be present at all times on the cooler side of the enclosure, allowing the snake to drink and soak if needed, especially during shedding.
Feeding and Supplementation: Strictly carnivorous. Feed appropriate-sized mice every 14 to 20 days for adults, and every 7 to 10 days for juveniles. Always use long feeding tongs to present food to minimize the risk of feeding bites. Avoid overfeeding, as this species has a slow metabolism and is prone to obesity in captivity. Dust prey items with a high-quality multivitamin once a month.
Compatibility: Due to its solitary nature, venomous status, and risk of cannibalism, this species must be housed individually. Cohabitation with other snakes, whether conspecifics or other species, is highly stressful and dangerous, often leading to severe territorial combat, injuries, or death.
Health and Common Diseases: Improper husbandry is the main cause of disease. Low humidity levels lead to incomplete sheds (dysecdysis) and retained eye caps. Excessively wet substrate combined with poor ventilation leads to respiratory infections and scale rot (blister disease). As a venomous reptile, all handling must be kept to a minimum and performed with appropriate snake hooks and safety protocols.
Geographic Origin and Distribution
This species is widely distributed throughout the tropical humid lowland rainforests of southern Mexico, extending through Central America (including Belize, Guatemala, Honduras, Nicaragua, Costa Rica, and Panama) to northern South America, specifically coastal Colombia and Ecuador. It predominantly dwells in the leaf litter of the forest floor, relying on the high ambient humidity and shade provided by the dense canopy.
Origin
Extra-Amazon South AmericaCentral America and Caribbean
Reptile profile
- Diet
- No verified data available
- Life expectancy
- No verified data available
- Adult size
- 63.5 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 63.5 cm. The ReptTraits v1.2 source reports a maximum adult measurement of 63.5 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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