In most cultures dragonflies have been objects of superstition.
European folklore is no exception.
Many old myths have been lost during the history, but fragments of these old myths are still living in old local names for dragonflies. Only in Germany dragonflies have had over 150 different names. Also the name Snake Doctor has been used in Germany. In England the name Devil's darning needle and Horse stinger have been used. Long time ago people in Sweden believed that hobgoblins, elves, brownies and such creatures lived in our great woods.