The Antiguan Racer is the world's rarest snake.
Picture from Fauna & Flora
In 1995 there were no more than 50 Antiguan Racer's left in the world, but over the years they have started to make a come back. In 2010 it was estimated that the snake's population had grown to over 500. These snakes can only be found on tiny Great Bird Island, a small island off the coast of Antigua.