Boa Constrictor – Like pythons, this species doesn’t have venom. It constricts prey, delivering the equivalent force of being trapped inside a vacuum cleaner. Despite having a reputation for being large, their average length is three metres (ten feet).
Sand boa – These burrowing snakes are excellent diggers. Their maximum length is 120 centimetres (four feet), though usually they only grow to half that size. Females are larger than males and are protected from the erosive sand by small, hardened scales.
Green anaconda – Green anaconda snakes grow to 500 times their size at birth, reaching up to eight metres (26 feet) in length and 30 centimetres (one foot) in diameter. They are extremely adaptable, as their habitat goes through annual droughts and flooding