They obviously don't swim well either as Dracula sank like a stone.
All kidding aside, there are vampire legends thruout the world, each with it's own unique way of dispatching the beastie.
However in the film world, fact and legend are immaterial as what looks good on screen and makes the plot work are the "legends and myth."
This page gives an interesting list
http://www.foggys-funnies.com/o/weenie/dracula.htm