The seven-step snake is a venomous snake known by a common folk name; learn its features and key precautions

The seven-step snake is a fairly widespread folk name, usually referring to a venomous snake found in the mountainous areas of southern China, and it is most often used for the sharp-nosed pit viper, also commonly known as the five-step snake or hundred-step snake. The name is exaggerated in tone, meaning that a person bitten cannot walk more than a few steps before collapsing; in reality it is meant to emphasize how fierce the venom is and to warn people to be especially careful. Understandings of the seven-step snake differ slightly from region to region, and sometimes it broadly refers to other venomous snakes found locally.

Taking the sharp-nosed pit viper as an example, it is fairly easy to identify by appearance: the tip of its snout is clearly upturned, its head is triangular, its body color is mostly brown or grayish brown, and there is a row of dark blotches along its back. As a pit viper, it has a pit between the eye and nostril that can sense the location of warm-blooded prey, and it is mostly active at night and in the early morning. Adult snakes are relatively large; they do not usually attack easily, but when startled they react quickly and are quite dangerous.

The seven-step snake mostly inhabits mountain woodlands, rock crevices in stream valleys, and shrub grass, where it is good at camouflaging itself and lying still in ambush, suddenly striking after prey approaches; it mainly preys on rodents, frogs, and small birds. It plays a role in controlling rodent damage in the wild and is part of the mountain ecosystem.

In traditional applications, the dried body of the sharp-nosed pit viper is the source of the Chinese medicinal material known as qishe, and folk tradition holds that it has uses such as dispelling wind and unblocking collaterals; such use must be guided by a professional physician. If you encounter this kind of venomous snake in the wild, simply keep your distance and slowly back away; do not tease it or try to catch it with your bare hands. If bitten, seek medical attention as soon as possible, and try to remember the snake's appearance so the doctor can judge; do not believe folk remedies and delay treatment.