Sirens, the harpies' distant relatives, are winged monsters found in teh Skellige Archipelago, most frequently on unpopulated isles or in the inaccessible coastal areas of populated ones. According to legend they are daughters of the mythcial winged giantHräsvelg, who lives on the edge of the world and births gales with the waving of his wings. Hräsvelg's daughters ssek out the company of giants and often make their nests near their lairs.
These creatures attack boats and ships from the air, tearing sails and rigging to shreds and rendering vessels immobile. At times they will snatch men or cattle from the deck and drop them from great heights to their death. They also attack travelers trekking across isolated beaches.