There are approximately 2,900 species of snakes in the world and they are all members of the suborder Serpentes.

Snakes can be found on all continents except Antarctica and do not occur on certain island nations such as New Zealand and Ireland.

Approximately 20% of the known species of snakes are venomous and they use this venom for subduing their prey.

Non-venomous snakes typically use constriction as a means to subdue their prey.