The Willow-Wren

The bird kingdom is missing a king, so they decide to hold a contest. The one to fly the highest will be the winner. The contest starts. The eagle is about to win. And all of a sudden a wren flies out of the eagle's feather. The birds find out about the trickery, but cause of it a winner cannot be announced. They organize another contest with a different rule. Do you think our old friend the wren will find another way to trick them? Who will be the birds' new king?