Fan Casting

A reclusive, temperamental bird named Red lives in a village on Bird Island with other flightless birds. When his temper causes a "premature hatching" of another bird's egg, he is sentenced to take an anger management class. Red’s classmates - Chuck (who is hyperactive and can move at the speed of light) and Bomb (who can cause explosions with his anger and fear) - try to befriend him, but he avoids them. One day, a boat docks at the island's shore, destroying Red's house. The birds are greeted by green-colored pigs and their captain Leonard, who claim to be peaceful explorers bringing offerings of friendship. The pigs ingratiate themselves with the birds, introducing them to various innovations, notably a giant slingshot, but begin to overwhelm the island with their numbers. Red becomes suspicious. Red recruits Chuck and Bomb to find Mighty Eagle, the only flying bird and the island's protector, who has not been seen for many years. They find Mighty Eagle on top of Bird Mountain, but he is overweight, self-absorbed, leads the life of a slacker, and refuses to help them. Red discovers the pigs planting dynamite around the island while the other birds are distracted with a rave party, but they arrive too late to sound a warning; the pigs escape with the eggs and activate the dynamite, destroying the village. The other birds apologize to Red for not believing him and, under his leadership, they organize an army and construct a boat from the rubble to follow the pigs to Piggy Island. The birds discover the pigs living in a walled city ruled by Leonard, whose true name is "King Mudbeard". Deducing the eggs are in the castle at the center of the city, the birds use the slingshot to attack by launching themselves over the walls and into the city's buildings, destroying them. Red, Chuck, and Bomb discover the eggs inside a net being lowered into a giant pot; the pigs are planning to cook and eat them. Mighty Eagle arrives to retrieve Red's group and the eggs, having had a change of heart after witnessing their efforts. One egg falls out of the net and Red battles King Mudbeard for it, but learns to control his anger and distracts him long enough to retrieve the egg. An explosion from Bomb ignites the pigs' reserve of dynamite, but the pot collapses and falls over top of Red, shielding him and the egg from the blast as the city is destroyed. Red reunites with the other birds as the egg hatches, revealing three small blue birds. Mighty Eagle approaches Red, Chuck, and Bomb, claiming he merely appeared lazy to help them find faith in themselves, and takes credit for saving the eggs. On Bird Island, Red discovers the other birds have rebuilt his house in the center of the village and the rest of the rescued eggs have hatched into chicks, who sing to him in gratitude. Moved, Red allows Chuck and Bomb to move in with him. The pigs are revealed to have survived, with King Mudbeard plotting to steal the birds' eggs again. In a mid-credits scene, the three blue birds use the slingshot to launch themselves out to ocean.