Migration Annihilation is a mission for the Big Daddy (Dunkleosteus). You must, using the Big Daddy, eat 5 Exotic Birds in one game. The reward is 4,750 . This mission is somewhat meduim/hard because Exotic Birds can be difficult to find sometimes.
Strategy[]
It is highly recommended you use a Jetpack because if you don't, you would have to rely on the giant fans and perfect jumps.