The King Cobra snake is the largest of the venomous land snakes, growing up to 18.5 feet (5.7 metres) in length and with a width of up to 1 foot (0.3 metres) at the neck.
The King Cobras venom is a neurotoxin, capable of killing humans. The mortality rate can be as high as 75%, however, most bites involve nonfatal amounts.

Their venom is not the most potent among venomous snakes, however, the amount of neurotoxin they can deliver in a single bite – up to two-tenths of a fluid ounce (seven millilitres) – is enough to kill 20 people, or even an elephant. Fortunately, king cobras are shy and will avoid humans whenever possible. King Cobra snakes are fiercely aggressive when cornered or provoked.

King Cobra venom attacks the victims nervous system and quickly induces severe pain, blurred vision, vertigo, drowsiness and paralysis. In the minutes following, cardiovascular collapse occurs and the victim falls into a coma. Death soon follows due to respiratory failure
King Cobra populations have reclined in some areas of its range due to the destruction of forests, however, despite this the snake is not listed by the IUCN as in danger of becoming extinct. The King Cobra is said to be the only snake which makes nests for its eggs. It is widely worshipped in India as nagaraja (‘king of snakes’).