Reptiles
Indian Cobra
Naja naja · also called spectacled cobra, Asian cobra, nag
The Indian cobra is the snake of the charmer’s basket, the temple carving, and — far less romantically — a large share of the world’s fatal snakebites. It is a medium-sized, adaptable elapid that thrives alongside people across the Indian subcontinent.
Overview
Indian cobras live throughout the subcontinent in a wide range of habitats — cultivated fields, rice paddies, scrub, open forest, wetlands, and the margins of villages and cities — anywhere with cover and a supply of rodents. They shelter in termite mounds, rat holes, rock piles, tree hollows, and abandoned buildings, and they are active by day and night depending on temperature and disturbance. Their tendency to hunt rats around farms and homes brings them into frequent contact with people.
The hood and the display
Like other cobras, Naja naja can spread a hood by swinging out a set of elongated neck ribs, stretching the loose skin of the neck into a broad disc. It does this when threatened, rearing up the front third of its body, hissing, and facing the danger, often with the spectacle marking displayed on the back of the hood. The posture is a warning; a cobra will hold it for a long time and prefers to back away if allowed.
Venom and snakebite
Indian cobra venom is chiefly neurotoxic, interrupting nerve-to-muscle signalling and, in a severe bite, progressing to paralysis of the muscles used for breathing. It also contains components that kill tissue around the bite. The species is one of India’s “big four” — the snakes responsible for most of the country’s tens of thousands of annual snakebite deaths — though effective antivenom exists and survival is high with prompt hospital care. Most bites happen to farmers and labourers working by hand in fields, and to people walking at night.
Diet and reproduction
Cobras hunt by scent and sight, and eat rodents, amphibians, birds, lizards, and other snakes, subduing prey with venom and swallowing it whole. In the breeding season the female lays 10 to 30 eggs in a burrow, termite mound, or leaf pile and, unusually for a snake, often stays with the clutch to guard it until the young hatch about two months later.
Cobras and people
The Indian cobra is Least Concern and remains common. It is protected under India’s Wildlife Protection Act, which has curtailed the once-widespread trades in cobra skins and in snake charming. The central conservation and public-health issue is coexistence — reducing snakebite through better footwear, lighting, bed nets, rodent control, and access to antivenom, while maintaining the long cultural tolerance that lets a highly venomous snake live in close quarters with hundreds of millions of people.
Indian Cobra: common questions
What is the "spectacle" mark on an Indian cobra?
On the back of the spread hood, many Indian cobras carry a pale marking shaped like a pair of connected rings or a curved figure resembling eyeglasses — hence "spectacled cobra." Seen from behind, as a predator approaching the raised snake would, it can look like a second, larger face staring back, and it may serve to startle or deter attackers. The pattern varies, and some populations show a single ring ("monocled" cobras are a separate species) or none.
How do snake charmers work with cobras?
The charmer sways a gourd flute called a pungi, and the cobra rises and "dances" by tracking the moving object and the charmer's swaying body, ready to strike if it lunges. Cobras have no external ears and hear almost nothing carried through the air, so the music is for the audience. Traditionally the snakes were often defanged, had their venom ducts blocked, or had their mouths sewn partly shut, and the practice is now illegal in India under wildlife law.
How dangerous is an Indian cobra bite?
Very. Indian cobra venom is primarily neurotoxic, blocking the signals between nerves and muscles, so a serious untreated bite leads to drooping eyelids, difficulty swallowing and breathing, and eventually respiratory paralysis; the venom also causes painful local tissue death. It is one of the snakes behind the roughly 58,000 snakebite deaths recorded in India each year. Polyvalent antivenom is effective, and the outlook is good if a bitten person reaches a hospital quickly.
Why is the cobra important in Indian culture?
The cobra, or "nag," is deeply woven into Hindu tradition — associated with the god Shiva, who wears one around his neck, with Vishnu, who rests on the serpent Shesha, and celebrated in the festival of Nag Panchami, when snakes are honoured and offered milk (which snakes cannot actually digest). This cultural reverence has historically given cobras a degree of tolerance around human settlements that few other dangerous animals receive.