There are fifteen families of snakes that are presently recognized, but over 2,900 species. Most snakes are non venomous. The venomous snakes usually use it to kill their prey.
There are over 2900 species of snake worldwide. There are 725 venomous species of snake. In the US, there are only 122 snake species, with 23 poisonous species, including a striped rattlesnake!
Non-venomous snakes kill by constricting and then suffocating their prey before eating them. Venomous snakes inject venom into their prey to kill or immobilize them before eating them.
