The swallow is a symbol of spring in Korean superstition and is revered as the bringer of rain. Superstitious citizens believe that it brings good luck, wealth and long life. A swallow's nest under one's roof is considered a sign of good luck. In some circles, they are even said to be transformed souls of the deceased. A well-known Korean fairy tale tells of a brother who cherished an injured swallow and was generously rewarded for it, while his envious brother injured a swallow and was punished for it.