Large-Eyed Pit Viper
Trimeresurus macrops
A green pit viper distinguished by unusually large eyes, found across forested regions of mainland Southeast Asia.
- Venomous?
- Venomous
- Adult length
- 0.6-0.9 m (2-3 ft)
- Range
- Mainland Southeast Asia, including Thailand, Laos, Cambodia, and Vietnam
Found a snake like this?
Identify any snake from a photo, free.
Overview
The Large-Eyed Pit Viper is a widespread green pit viper species across Indochina, commonly encountered in forested and agricultural landscapes. Its name references its proportionally large eyes compared to related species.
It is one of the more frequently observed pit vipers within its range due to its adaptability to disturbed and forest-edge habitats.
How to identify it
- Uniform green coloration, sometimes with a faint yellow or white lateral line
- Notably large eyes relative to head size, giving rise to its common name
- Reddish or orange iris in many individuals
- Triangular head with heat-sensing pits
- Slender body with a prehensile tail
- Separated from similar green pit vipers by eye size and iris coloration
Habitat & range
Found in tropical forests, bamboo groves, forest edges, and agricultural areas across Thailand, Laos, Cambodia, and Vietnam. Occurs from lowlands to moderate elevations, often near streams and vegetation used for perching.
Behavior, diet & reproduction
Nocturnal and arboreal, typically resting on low branches or shrubs during the day. Preys on frogs, lizards, small mammals, and birds. Gives birth to live young, being viviparous like most Asian pit vipers.
Frequently asked questions
Why is it called the Large-Eyed Pit Viper?
It has notably large eyes compared to other green pit viper species.
Is the Large-Eyed Pit Viper venomous?
Yes, it is venomous.
Where is the Large-Eyed Pit Viper found?
Across mainland Southeast Asia, including Thailand, Laos, Cambodia, and Vietnam.
Does it lay eggs?
No, it gives birth to live young.
Large-Eyed Pit Viper guides
In-depth guides for identifying and understanding Large-Eyed Pit Viper.
