Stymphalian birds were enourmous in size with sharp bronze feathers, large metal beaks and claws.
These avian pets of Hadees were extremely strong, they wpuld shed their brutal feathers like spears which would easily pierce their armor.
They would terrorize the people of Arcadia with their dangerous plumage and toxic poop.
After every raid, hungry birds followed and ate the dead and killing the remaining injured bodies.
Hercules was able to kill and drive these birds away after the help of goddess Athena.
Athena give Hercules a loud rattle and when he shook this, it made thunderstorms which made the birds fly aimlessly in the sky and then Hercules shot them one by one with arrows.