How to Identify Kaulback's Lance-Headed Pit Viper (Identification Guide)

Key identifying features

Kaulback's lance-headed pit viper (Protobothrops kaulbacki) is identified by its distinctly elongated, lance- or spear-shaped head, a stout body, and a pattern of dark blotches on a brownish or olive background, found in high-elevation forests of northern Myanmar and adjacent southwest China.

Coloration & pattern

The body is typically olive, brown, or grayish, marked with a series of darker brown or blackish blotches or crossbands, sometimes irregular in shape, running the length of the back. The belly is generally pale with scattered darker markings.

Head, eyes & scales

The head is notably elongated and lance-shaped, giving it a more pointed, spear-like profile compared to the broader triangular heads of many other pit vipers, though still clearly wider than the neck. Heat-sensing pits are present between eye and nostril, and pupils are vertically elliptical. Body scales are keeled.

Size & body shape

This is a moderately large pit viper, with adults reaching roughly 1 to 1.3 meters (about 3.3 to 4.3 feet), and a fairly robust body suited to its montane forest habitat.

Range & habitat where you'll see it

Kaulback's lance-headed pit viper is found in the mountainous forests of northern Myanmar and adjacent parts of Yunnan, China, typically at relatively high elevations in cool, moist forest environments.

How to tell it apart from look-alikes

The elongated, lance-shaped head is the primary feature distinguishing this species from other Protobothrops pit vipers, which tend to have broader, more standard triangular heads. Its high-elevation range in the Myanmar-China border region also helps narrow identification.