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Kaulback's lancehead
Protobothrops kaulbacki
An extremely rare, formidable venomous reptile native to rugged Asian montane forests. It is deeply characterized by potent cytotoxic venom and highly cryptic nocturnal habits.
Class:Squamata
Order:Squamata
Family:Viperidae
Subfamily:Crotalinae
Genus:Protobothrops
Species:Protobothrops kaulbacki
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Environment
Terrestrial
Humidity
70 - 85 %
Day temperature
19 - 23 °C
Ambient temperature
19 - 23 °C
Night temperature
15 - 17 °C
Basking spot
27 - 28 °C
Adult size
141 cm
Minimum enclosure
>= 250 L
Brumation temperature
10 - 14 °C
UVB
Low
Species description
Geographical Origin and Habitat: Protobothrops kaulbacki is native to the mountainous regions of Southern and Eastern Asia, with populations localized primarily in northern Myanmar (Burma), southeastern Tibet, and southwestern provinces of China. Its preferred habitat consists of cool, humid montane rainforests, dense bamboo stands, and rocky areas near fast-flowing mountain streams at elevations ranging between 1,000 and 2,500 meters above sea level. This environment features cool temperatures, constant fog, and a high relative humidity throughout the year.
Taxonomy and Genetics: It belongs to the family Viperidae, subfamily Crotalinae (pit vipers), and genus Protobothrops. It is a large-bodied species closely related to other Asian lanceheads. Genetically, it displays specialized adaptations to survive in montane climates that are significantly cooler than those inhabited by most other tropical pit vipers. It possesses heat-sensing loreal pits located between the eyes and nostrils to detect warm-blooded prey in darkness.
Behavior and Habits: This snake is a solitary, nocturnal, and crepuscular species that spends the daytime hidden in deep leaf litter, rock crevices, or animal burrows. It is an ambush predator, waiting motionlessly for hours for prey to pass within striking distance. Although predominantly terrestrial, it is an agile climber and can be found in low bushes or bamboo stalks. It has a defensive and irritable temperament; when threatened, it coils into an S-shape, ready to strike rapidly.
Morphology: It is a large viper that can reach and exceed a total length of 1.5 to 2 meters. It features a distinct triangular head well-demarcated from the neck, covered with small, irregular scales. The body is robust yet slender, with strongly keeled dorsal scales. The coloration is highly cryptic, with an olive-green, greyish, or dark brown background marked with irregular black or dark brown blotches along the spine, providing perfect camouflage on the forest floor.
Care, breeding and tankmates
Terrarium Setup: Requires an exceptionally large and secure enclosure, with minimum dimensions of 150x60x80 cm for a single adult. Because this is a highly venomous species, the terrarium must be equipped with secure, key-operated safety locks and tempered glass panels to prevent escapes. The substrate should consist of a thick layer of damp peat moss and coconut fiber, topped with dry leaf litter. Provide sturdy climbing branches, artificial or robust live plants, and at least two hide boxes (one in the warm zone and one in the cool zone).
Lighting and Heating: Lighting should be moderate and active for 10-12 hours a day. Use a low-output UVB bulb (2% or 5% T5) to replicate sunlight filtering through the dense forest canopy. Heating must establish a precise thermal gradient: daytime temperatures should range from 18-20 °C in the cool zone to 24-25 °C in the warm zone, with a localized basking spot of 27-28 °C created by a guarded ceramic heat emitter. Night temperatures should drop to 16-18 °C.
Humidity and Hydration: Relative humidity is a critical factor and must be maintained high, between 70% and 80%, with higher peaks at night. This is achieved by misting the enclosure once or twice daily with lukewarm water and keeping the substrate damp but never soggy to prevent blister disease. A large, heavy water bowl must always be available for drinking and soaking, which is especially important during the shedding process.
Feeding and Supplementation: In the wild, it feeds on small mammals, birds, frogs, and occasionally other reptiles. In captivity, they should be fed frozen-thawed rodents (mice or rats) appropriate for the snake's size, offered once every 10-14 days for adults. Juveniles may require smaller prey items fed more frequently. Vitamin and calcium supplementation is generally unnecessary when feeding whole rodents but can be used occasionally.
Compatibility: Due to its solitary, territorial nature and the extreme danger of its venomous bite, this species must be housed strictly alone. Co-housing is not tolerated and will lead to stress, fighting, or cannibalism. Handling must be kept to an absolute minimum and performed only by experienced keepers trained in the use of snake hooks, tongs, and secure shift boxes.
Health and Common Diseases: Main health risks include respiratory infections resulting from stagnant air combined with high humidity, and scale rot (dermatitis) caused by constantly wet substrate. Internal and external parasite infestations can cause lethargy and loss of appetite. Monitor the shedding process closely: retained eye caps or tail tips indicate that the relative humidity in the enclosure is too low.
Geographic Origin and Distribution
Protobothrops kaulbacki is native to the mountainous regions of Southern and Eastern Asia, with populations localized primarily in northern Myanmar (Burma), southeastern Tibet, and southwestern provinces of China. Its preferred habitat consists of cool, humid montane rainforests, dense bamboo stands, and rocky areas near fast-flowing mountain streams at elevations ranging between 1,000 and 2,500 meters above sea level. This environment features cool temperatures, constant fog, and a high relative humidity throughout the year.
Origin
South and Southeast AsiaEast Asia
Reptile profile
- Diet
- No verified data available
- Life expectancy
- No verified data available
- Adult size
- 141 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 141 cm. The ReptTraits v1.2 source reports a maximum adult measurement of 141 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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