In the Angry Birds series, Birds are the protagonists, and come in varieties of different species. Their main goal is to retrieve the eggs that their enemies, the Pigs , stole. Since then, they care mostly about revenge than anything, and hurl themselves using a Slingshot at various structures the Pigs made. There are 9 playable birds in Angry Birds, 9 in Seasons , 10 in Rio , 7 playable birds and 1 egg in Space , & 7 birds from Angry Birds Star Wars and 1 egg, plus 5 Mighty Creatures. When a level is completed with unused birds, the player is awarded with 10,000 points for each unused bird. This increases the chance of getting 3 stars in a level.