The Harpyai or Harpies were half-bird, half-woman creatures who were the half-sisters of Iris. They had sharp claws. The myth they are best known for is when they harrassed the blind king Phineus. The Boreads (who also had wings) were two of the Argonauts. They Boreads chased the Harpies away. Phineus out of gratitude provided them with information for their quest.