Hercules was called by King Eurystheus to rid the Stymphalian Marsh of man-eating birds that had brass wings, beaks, and claws. The king's archers had previously failed to remove the birds. When Hercules arrived, Athena gave him a brass rattle. Hercules shook the rattle from the top of a cliff, causing the birds to take flight. He then shot many of them with his bow and arrows. The remaining birds fled, and Hercules stayed for a couple days to ensure they did not return before returning in triumph.