Reptiles Active at night

Common Bamboo Viper

Craspedocephalus gramineus

iNaturalist Wikipedia

The Common Bamboo Viper is a master of disguise, blending seamlessly into the emerald leaves of the Indian forest. This nocturnal pit viper uses advanced thermal imaging to rule the night from the safety of the canopy.

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Quick Identification

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Size

Typically 60–90 cm (24–35 inches) in total length, though large females can occasionally exceed this range.

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Colors

Brilliant lime green or yellowish-green throughout the upper body; the belly is usually pale yellow or whitish. A thin, faint white or yellow longitudinal line often runs along the lower flanks.

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Key Features

Distinct triangular-shaped head much wider than the neck
Heat-sensing loreal pits located between the eyes and nostrils
Prehensile tail often tipped with reddish-brown or orange
Vertical cat-like pupils and keeled scales

When You’ll See Them

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Activity pattern Active at night

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Peak hours 8 PM - 3 AM

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Season Year-round, with peak visibility during the monsoon season (June–September)

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Diet A generalist carnivore that preys on small mammals like mice and shrews, as well as frogs, lizards, and occasionally nesting birds.

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Habitat Bamboo groves, moist deciduous forests, evergreen forests, and occasionally suburban gardens or plantations near wooded areas.

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Where Does the Common Bamboo Viper Live?

The Common Bamboo Viper is native to the Indian subcontinent, specifically concentrated in the southern and northeastern regions of India. It is a characteristic inhabitant of the Western and Eastern Ghats, thriving in the humid, hilly terrain of states like Maharashtra, Karnataka, and Tamil Nadu. While it is a staple of Indian herpetofauna, related species often cause confusion in neighboring Southeast Asian countries, but the true Common Bamboo Viper remains a signature resident of India's lush woodlands.

Basemap © OpenStreetMap contributors

1 Countries

1.2M km² Range

Least Concern Conservation

IN India

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iNaturalist / Verified observation data

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Behavior

The Common Bamboo Viper is a primarily arboreal and nocturnal predator. During the daylight hours, it remains remarkably still, coiled among dense bamboo thickets or low-hanging forest foliage where its green coloration provides near-perfect camouflage. It is a classic ambush hunter, often staying in the same position for days at a time waiting for a prey item to wander within striking distance.

While generally slow-moving and lethargic, this species is capable of lightning-fast strikes when threatened or when hunting. It uses its heat-sensing pits to detect the infrared signatures of warm-blooded prey, allowing it to hunt effectively in complete darkness. Though venomous, it is not considered aggressive toward humans and will usually only strike if stepped on or handled.

photo_camera EverydayEarth exclusive

Camera Tips

To capture the Common Bamboo Viper on camera, you must think vertically. These snakes spend the majority of their lives off the ground, so mounting your AI-powered camera at eye level (roughly 4 to 6 feet high) on a tree trunk or bamboo stalk is far more effective than a ground-level setup. Angle the camera slightly downward toward a sturdy branch or a cluster of leaves where a snake might find a secure anchor point for an ambush.

Because these vipers are masters of camouflage, high-resolution settings are a must. In lower resolutions, they can easily be mistaken for a thick vine or a fold in a leaf. Use a camera with a high-quality 'no-glow' infrared flash; since they are nocturnal, you need clear nighttime images to distinguish their triangular head shape and scale patterns without frightening them away with visible light.

Focus your efforts near 'prey hotspots.' Placing cameras near small forest ponds, bird feeders, or areas with high rodent activity will significantly increase your chances. Vipers often return to the same successful hunting spots. If you see one on camera, keep the device in that location for several weeks, as they are known for their extreme site fidelity.

Lastly, ensure your camera's trigger sensitivity is set to its highest level. Because vipers are sit-and-wait predators, they may remain motionless for hours. You want the camera to fire the moment the snake adjusts its position or begins to descend the tree. Using a 'Time Lapse' mode alongside the motion trigger can also help capture the presence of a snake that isn't moving enough to trip the PIR sensor.

Similar Species

Species that look similar or are commonly confused with Common Bamboo Viper.

Green Vine Snake

Vine snakes are much thinner with extremely elongated snouts and horizontal pupils, lacking the stocky build and triangular head of the Bamboo Viper.

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Frequently Asked Questions

They are strictly nocturnal, emerging at dusk to hunt and becoming most active during the humid night hours. During the day, they remain motionless and hidden in foliage.

The best way to attract them is by creating a balanced ecosystem. Planting bamboo or dense shrubs and maintaining a small water feature will attract frogs and rodents, which are the primary food sources for the viper.

Their diet is quite varied, consisting of frogs, lizards, small birds, and various rodents. They use their venom to immobilize prey quickly after a strike.

Yes, they are frequently found in suburban areas that border forests or contain large gardens and plantations, especially in regions like the Western Ghats of India.

Look for the distinct triangular head and the heat-sensing pits between the eye and nostril. Non-venomous green snakes, like the Green Vine Snake, have much narrower, elongated heads and lack these heat-sensing pits.

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