How to Identify the Hump-Nosed Pit Viper (Identification Guide)
The Hump-Nosed Pit Viper is a small terrestrial viper identified by its upturned, hump-shaped snout, triangular head, and mottled brown or gray camouflage pattern.
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Key identifying features
The Hump-Nosed Pit Viper is named for its distinctive upturned, slightly hump-shaped snout, which gives the tip of its nose a raised, pointed profile unlike the more rounded snouts of related pit vipers. Combined with its triangular head, heat-sensing facial pits, and mottled cryptic body pattern, this snout shape is the most reliable single feature for identification.
Coloration & pattern
The dorsal coloration is typically brown, grayish brown, or reddish brown, overlaid with darker irregular blotches, triangles, or mottled patches that create an effective camouflage against leaf litter and forest floor debris. Some individuals show a faint zigzag or broken vertebral pattern, while others appear more uniformly speckled. The belly is pale, often cream or light brown with scattered darker markings.
Head, eyes & scales
The head is broad, flattened, and triangular, distinctly wider than the neck, with the diagnostic upturned snout visible in profile view. Eyes have vertically elliptical pupils, and heat-sensing pits are present between the eye and nostril. Dorsal scales are strongly keeled, adding to the rough, textured appearance that helps with camouflage among dead leaves and forest debris.
Size & body shape
This is a small, stout-bodied pit viper, typically reaching only 30 to 50 centimeters in length, with a relatively thick body for its size and a short tail. Unlike many arboreal pit vipers, it has a more compact, terrestrial build suited to life on the forest floor.
Range & habitat where you'll see it
The Hump-Nosed Pit Viper is found in the Western Ghats and other forested regions of southern India and Sri Lanka, where it inhabits leaf litter, forest floor debris, and areas near streams in humid evergreen and semi-evergreen forest. It is primarily terrestrial and nocturnal, relying heavily on camouflage rather than active flight from threats.
How to tell it apart from look-alikes
The upturned, hump-shaped snout is the clearest distinguishing feature separating this species from other pit vipers in its range, most of which have more rounded or flat snout profiles. Its predominantly terrestrial habits, mottled brown camouflage pattern, and smaller overall size compared to arboreal green pit vipers further support field identification, alongside the standard triangular head and heat-sensing pits shared by all pit vipers.
Frequently asked questions
What is the defining feature of the Hump-Nosed Pit Viper?
Its upturned, slightly hump-shaped snout, best seen in profile, which distinguishes it from other pit vipers.
What color pattern does it typically have?
Brown, grayish brown, or reddish brown with darker mottled blotches that camouflage well with leaf litter.
Is this species usually found on the ground or in trees?
It is primarily terrestrial, found in leaf litter and forest floor debris rather than climbing vegetation.
How large does this snake get?
It is small, typically 30 to 50 centimeters, with a stout body and short tail.
Where is it found?
In the Western Ghats of southern India and in Sri Lanka, within humid evergreen forest habitats.