The Sixth Labour of Hercules

Legend
The sixth labour was to defeat the Stymphalian Birds

Once Hercules had arrived at the lake he couldn't do anything because of the the dung around the lake. But luckily for Hercules Athena was watching and gave Hercules a rattle to scare the birds. When he rattled it all the birds flew away and Hercules shot some down. He then showed King Erytheus the dead birds.