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Mexican Smallhead Rattlesnake
Crotalus intermedius
<i>Crotalus intermedius</i> (commonly known as Mexican Smallhead Rattlesnake) is native to highlands of central and southern Mexico, where it inhabits montane pine-oak forests, rock slides, and highland woodlands.
Class:Squamata
Order:Squamata
Family:Viperidae
Subfamily:Crotalinae
Genus:Crotalus
Species:Crotalus intermedius
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Environment
Terrestrial
Humidity
40 - 60 %
Day temperature
25 - 30 °C
Night temperature
15 - 20 °C
Adult size
57 cm
UVB
Low - Medium
Species description
Geographical Origin and Habitat: Crotalus intermedius (commonly known as Mexican Smallhead Rattlesnake) is native to highlands of central and southern Mexico, where it inhabits montane pine-oak forests, rock slides, and highland woodlands. This reptile inhabits high-altitude montane pine-oak forests, adapting well to the temperate and cool microclimates typical of Mexican mountain ranges.
Taxonomy and Genetics: Belongs to the family Viperidae, genus Crotalus. It is studied for its unique venom genetics and specialized physiological adaptations. The systematics of this viper highlight specific genetic adaptations for high-altitude survival, including a respiratory system optimized for low oxygen levels.
Behavior and Habits: Predominantly terrestrial, solitary, and nocturnal. It spends most of the day camouflaged in leaf litter or under shelters waiting for prey. It exhibits a calm yet highly alert temperament, spending long periods in an ambush posture camouflaged among pine needles and leaf litter.
Morphology: Adults reach an average size of 50.0 cm. Males typically exhibit longer tails than adult females. Its small body size and proportionally narrow head facilitate excellent camouflage and allow it to wedge into tight crevices among volcanic rocks.
Care, breeding and tankmates
Terrarium Setup: Requires an escape-proof terrarium of at least 100 liters with natural loose substrate and secure hiding spots. The enclosure requires a spacious and well-ventilated terrarium, equipped with sturdy branches and multiple dry hiding spots in both warm and cool zones.
Lighting and Heating: Carnivorous diet consisting of properly sized rodents fed via long feeding tongs. Supplement with vitamins. Thermoregulation must include a heating element to create a precise thermal gradient, accompanied by a specific UVB light source for montane reptiles.
Humidity and Hydration: Keep ambient temperatures at 12.0-24.0°C with a basking spot of 26.0°C. Provide low UVB. Moderate humidity levels prevent respiratory issues and facilitate successful shedding, especially when a humid hide with damp moss is provided.
Feeding and Supplementation: Solitary species, must be housed individually. Keeping multiple snakes together leads to severe stress. The diet consists of appropriately sized rodents, preferably thawed and offered using long feeding tongs to maintain safety protocols.
Compatibility: Breeding is difficult in captivity, requiring a cooling period and careful introduction under supervision. As a venomous and highly territorial species, it must only be kept by experienced herpetologists and housed individually at all times.
Health and Common Diseases: Prone to respiratory tract infections if ventilation is poor, and blister disease if the substrate is excessively wet. Keepers must closely monitor for cutaneous fungal infections caused by wet substrate and prevent respiratory issues by ensuring excellent air circulation.
Geographic Origin and Distribution
Crotalus intermedius (commonly known as Mexican Smallhead Rattlesnake) is native to highlands of central and southern Mexico, where it inhabits montane pine-oak forests, rock slides, and highland woodlands. This reptile inhabits high-altitude montane pine-oak forests, adapting well to the temperate and cool microclimates typical of Mexican mountain ranges.
Origin
Central America and Caribbean
Reptile profile
- Diet
- No verified data available
- Life expectancy
- No verified data available
- Adult size
- 57 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 57 cm. The ReptTraits v1.2 source reports a maximum adult measurement of 57 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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