How to Identify the Chinese Green Tree Viper (Identification Guide)

Key identifying features

The Chinese green tree viper (commonly referring to species in the genus Trimeresurus/Viridovipera, such as the white-lipped pit viper found in China) is a venomous species identified by its bright green coloration, slender arboreal body, and a broad, triangular, venomous pit viper head distinct from the neck.

Coloration & pattern

The dorsal color is typically a vivid, uniform green, sometimes with a faint yellowish tinge, closely matching foliage. Many individuals show a pale white, yellow, or reddish lateral stripe running along the lower sides of the body, which can be more pronounced in males. The belly is pale green to yellowish-white. The tail tip in some related green pit vipers may show a reddish or rust coloration, a useful field mark in certain species within this group.

Head, eyes & scales

The head is broad, flattened, and strongly triangular, clearly set off from a narrow neck, with heat-sensing pits located between the eye and nostril. The eyes are relatively large with vertical, cat-like pupils. Scales are keeled, giving a slightly rough texture rather than the smooth glossy scales of many non-venomous arboreal snakes such as green tree pythons.

Size & body shape

Adults are slender and moderately sized, typically reaching about 2 to 2.5 feet, with a laterally adapted, prehensile-tailed body suited to moving through shrubs and low tree branches, though generally more slender overall than large-bodied constricting pythons.

Range & habitat where you'll see it

This species is found in southern China and adjacent parts of Southeast Asia, inhabiting forest edges, shrubland, bamboo groves, and vegetation near streams, where it is often found coiled on low branches or shrubs, especially at night.

How to tell it apart from look-alikes

The Chinese green tree viper can be distinguished from the unrelated green tree python by its much smaller size, keeled (rather than smooth) scales, vertical pupils, heat-sensing facial pits, and triangular venomous head shape. Within its own group of Asian green pit vipers, the presence and color of a lateral stripe and any reddish tail coloration help separate closely related species, though confirming an exact species often requires close examination of scale counts by a specialist.