This section includes all venomous snakes that carry venomous teeth in the front of the upper jaw. Some of the species have the strongest poison, which is a deadly danger to humans, the poison of others is not so strong and can only cause mild inflammation.
The section includes such snakes as: viper, gyurza, rattlesnake, cobra, etc.
The maximum recorded size is 151.5 cm (4.97 ft).
Lifespan is up to 30 years.