 There are four species of snake on the island and these are not dangerous to humans.The four species include the leopard snake (locally known as Ochendra), the Balkan whip snake (locally called Dendrogallia), the dice snake (called Nerofido in Greek), and the only venomous snake is the nocturnal cat snake which has evolved to deliver a weak venom at the back of its mouth to paralyse geckos and small lizards, and is not dangerous to humans.Sea turtles include the green turtle and the loggerhead turtle which are both threatened species.