Reptiles Active at night

Russell's Viper

Daboia russelii

iNaturalist Wikipedia

South Asia's most famous ambush predator, the Russell's Viper, is easily recognized by its beautiful chain-link pattern and its fearsome, pressure-cooker hiss.

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0 Habitats

Quick Identification

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Size

Typically 90-125 cm (3-4 ft) in length, though large specimens can reach up to 166 cm (5.5 ft). They are thick-bodied and heavy for their length.

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Colors

Tan, brown, or yellowish-brown base with three longitudinal rows of dark brown spots. Each spot is outlined with a black ring and a thin white or yellow border, creating a chain-like appearance.

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Key Features

Distinctly triangular, flat head much wider than the neck
Three rows of dark brown, chain-link oval spots along the body
Large, prominent nostrils and a blunt, slightly upturned snout
Heavily keeled scales that give the snake a rough, non-glossy texture

When You’ll See Them

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Activity pattern Active at night

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Peak hours 7 PM - 4 AM

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Season June-November (monsoon and post-monsoon period)

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Diet Primarily feeds on rodents like rats and mice, but will also eat small birds, lizards, and frogs. It is a classic ambush predator that waits for prey to cross its path.

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Habitat Open grasslands, scrublands, agricultural fields (especially rice and sugarcane), and the edges of suburban settlements.

public Geographic range

Where Does the Russell's Viper Live?

Russell's Viper is native to the South Asian subcontinent, maintaining a vast and continuous range across India, Pakistan, Sri Lanka, Bangladesh, and Nepal. While it is a lowland specialist, it can be found in the foothills of the Himalayas and the rolling hills of the Western Ghats. This adaptable predator thrives in the fertile plains of the Ganges and Indus rivers but is notably absent from dense rainforests and extremely arid deserts, preferring the 'middle ground' of scrub and farmland.

Basemap © OpenStreetMap contributors

6 Countries

5.2M km² Range

Least Concern Conservation

IN India Pakistan Sri Lanka Bangladesh Nepal Myanmar

Elevation range

0 m1,000 m2,000 m4,000 m

Sea level – 2,300 m

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iNaturalist / Verified observation data

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Behavior

The Russell's Viper is a primarily nocturnal hunter, though it may be seen basking during the day in cooler weather. It is famously lethargic and slow-moving until threatened; however, when provoked, it becomes one of the most aggressive snakes in the world. It coils into a tight 'S' shape and emits a piercingly loud hiss—often compared to the sound of a pressure cooker—which serves as a final warning before a lightning-fast strike.

Unlike many other vipers that strike and release, the Russell's Viper may hang on to its prey to deliver a massive dose of venom. While they generally avoid human contact, their preference for rodents often brings them into close proximity with agricultural areas and suburban gardens, leading to frequent human-wildlife encounters. They are terrestrial snakes, meaning they spend almost all their time on the ground rather than in trees or water.

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Camera Tips

To capture high-quality footage of a Russell's Viper, camera placement is everything. These are heavy, ground-dwelling snakes, so your camera must be mounted no more than 6-10 inches off the ground. Aim the lens slightly downward to cover the forest floor or a field edge. Look for natural funnels, such as the gap between a rock and a wall, or along the edges of agricultural grain stores where rodents congregate. Their movement is slow and deliberate, so set your PIR (Passive Infrared) sensor to high sensitivity to ensure the cold-blooded reptile triggers the shutter.

Because they are most active at night, a camera with 'No-Glow' or 'Black Flash' infrared LEDs is essential. Standard red-glow LEDs can sometimes startle the prey they are stalking, which might spoil a natural hunting sequence. Using video mode rather than still photos is highly recommended; the slow, undulating movement of a large viper is far more impressive and easier to identify on film than in a blurry night-time photo. Set your video length to at least 20 seconds to capture the full transit of the snake across the frame.

Safety is paramount when checking cameras in Russell's Viper territory. Never reach into long grass or under a camera housing with your bare hands, especially at night. Always use a flashlight and wear thick, knee-high boots when servicing your equipment. Since these snakes are attracted to rodent activity, placing your camera near woodpiles or compost heaps in a backyard setting often yields the best results during the monsoon season when the snakes are most active.

Similar Species

Species that look similar or are commonly confused with Russell's Viper.

Saw-scaled Viper

Much smaller (under 80cm) with a white 'cross' mark on the head and a side-winding movement.

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Frequently Asked Questions

Russell's Vipers are primarily nocturnal, meaning they are most active after sunset and through the night. However, during cooler months or on overcast days, they may venture out during the day to bask in the sun to regulate their body temperature.

You don't typically want to 'attract' this venomous snake, but they are naturally drawn to areas with high rodent populations. Maintaining woodpiles, tall grass, or grain storage will provide both cover and food (rats/mice) for them. To safely observe them, place cameras near these features.

Their diet consists almost entirely of small mammals, specifically rodents like field rats and house mice. They also occasionally eat small birds, lizards, and frogs if the opportunity arises.

Yes, they are very common in suburban outskirts and rural villages. Because they follow rats and mice, which thrive in human settlements, the Russell's Viper is frequently found in gardens, farms, and even under houses.

While both are thick-bodied, the Russell's Viper has distinct oval spots arranged like a chain, whereas the Python has larger, irregular rectangular blotches. The Viper also has a much more distinct triangular head and a significantly shorter total length than an adult Python.

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