Back to atlas
ReptileTerrestrialHard

Encyclopaedia

Mexican Horned Pit Viper

Ophryacus undulatus

Rare horned pit viper endemic to the pine-oak forests of Mexico, adapted to cool and humid montane climates.

Family
Viperidae
Origin
Southern Mexico (Guerrero, Oaxaca, Veracruz)
Origin
Extra-Amazon South AmericaCentral America and Caribbean
Tank use
Used in 0 tanks

Share

Species challenges
Water Temperature

12 °C - 26 °C

pH Value

n/a

Water type

Terrestrial

Basking spot

25 °C

UVB

Low

Species description

Geographical Origin and Habitat: Endemic to southern Mexico. This reptile lives in high-altitude, humid pine-oak montane forests, often found among low vegetation, moss, and wet rocks.

Taxonomy and Genetics: The genus Ophryacus includes pit vipers endemic to Mexico, characterized by modified supraocular scales forming flexible horns.

Behavior and Habits: Terrestrial and partially arboreal, active during the day and early evening. Highly secretive, relying on camouflage to blend with their surroundings.

Morphology: Features a distinct flexible supraocular spine (horn), and a grayish-green or brown body with dark zig-zag bands. Adult females are larger than males.

Care, breeding and tankmates

Terrarium Setup: Requires a semi-vertical enclosure decorated with climbing plants, cork bark, and a substrate of peat moss and sphagnum to retain humidity.

Lighting and Heating: Maintain cool temperatures between 12°C and 26°C. Avoid temperatures exceeding 26°C. Provide low-output UVB lighting for 10-12 hours daily.

Humidity and Hydration: Keep humidity levels around 65-80%. Mist daily with lukewarm water; they prefer drinking droplets from leaves.

Feeding and Supplementation: Offer appropriately sized rodents every 10-14 days. Dust prey with calcium and vitamin supplements once a month.

Compatibility: Strictly solitary. Individual housing is strongly recommended to prevent stress and defensive behavior.

Health and Common Diseases: Vulnerable to respiratory infections in highly humid, poorly ventilated enclosures. Highly sensitive to heat stroke.

Reptile profile

Diet
Carnivore
Humidity
65 % - 80 %
Ambient temperature
20 °C
Basking spot
25 °C
UVB
Low
Adult size
60 cm
Minimum enclosure
120 L

Image gallery

Licensed images linked to the species or, when marked, to the closest representative taxon.

Related species

Other recommended species with similar care requirements and water parameters.

Last updated: 06/13/2026