In the Angry Birds series, the Birds are the main protagonists of the Angry Birds series, which come in a variety of different species. Their main goal is to retrieve the un-hatched eggs that their arch-nemesis, the Pigs, stole. The BIrds since then care more about revenge than anything, and hurl themselves at the various structures the Pigs constructed.
The bird's only known allies include the Mighty Eagle, and in the crossover title Angry Birds Rio, Blu and Jewel.
When a level is completed with unused birds, the player is awarded with 10,000 points for each bird.