How to Identify the Redtail Bamboo Pit Viper (Identification Guide)
The redtail bamboo pit viper is a slender, arboreal green pit viper of South and Southeast Asia, distinguished by its vivid green body contrasting sharply with a reddish-brown tail tip.
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Key identifying features
The redtail bamboo pit viper (Trimeresurus erythrurus) is a slender, arboreal pit viper best recognized by the striking contrast between its bright green body and its reddish-brown or rust-colored tail, which gives the species its common name. This tail coloration is a reliable field mark that sets it apart from many similarly green bamboo pit vipers in the same region.
Coloration & pattern
The body is typically a uniform bright to yellowish green, sometimes with faint darker or lighter flecking along the sides, but generally without bold banding. The tail contrasts distinctly, shifting to reddish-brown, chestnut, or rust tones over the last several inches, clearly demarcated from the green of the rest of the body. A thin white or pale yellow lateral stripe may be present along the lower sides in some individuals.
Head, eyes & scales
The head is broad, triangular, and clearly distinct from the neck, typical of pit vipers, with a heat-sensing pit between the eye and nostril. Eyes have vertically elliptical pupils, often golden or coppery in color. Scales are keeled, giving the body a slightly rough texture beneath its glossy green coloring.
Size & body shape
This is a small to moderate-sized pit viper, with adults typically reaching 20 to 30 inches. The body is slender and laterally compressed, an adaptation for climbing and moving through vegetation, with a prehensile-capable tail used for gripping branches.
Range & habitat where you'll see it
The redtail bamboo pit viper is found in South and Southeast Asia, including parts of India, Bangladesh, and Myanmar. It is highly arboreal, inhabiting bamboo thickets, shrubs, and low trees in forests, plantations, and sometimes gardens, where its green coloration provides effective camouflage among leaves.
How to tell it apart from look-alikes
Many green pit vipers in Asia share a similar overall green coloration, making the reddish-brown tail the single most useful distinguishing feature of this species; most other regional bamboo pit vipers retain a green tail matching the rest of the body. Careful attention to tail color, combined with range, helps separate the redtail bamboo pit viper from closely related species such as the white-lipped pit viper or Malabar pit viper, which lack the reddish tail contrast.
Frequently asked questions
What is the key feature identifying the redtail bamboo pit viper?
A sharply contrasting reddish-brown or rust-colored tail against an otherwise bright green body.
What color is most of the redtail bamboo pit viper's body?
The body is typically a uniform bright to yellowish green, with the color change occurring only at the tail.
How large does this species get?
Adults typically reach 20 to 30 inches, with a slender, laterally compressed body suited to climbing.
Where is the redtail bamboo pit viper found?
It occurs in South and Southeast Asia, including India, Bangladesh, and Myanmar, in forests and bamboo thickets.
How do you tell it apart from other green pit vipers?
Most related green pit vipers retain a green tail, so the reddish-brown tail contrast is the clearest distinguishing feature of this species.