Real Birds are official Birds made by Rovio for their games. This comprends the 3 Mighty creatures.
Screams and does minimal damage to the pigs.
Turns into three birds.
Drops an Eg Bomb
Name says it all. Boomerang Bird.
Big Brother Bird
Blows bubbles, trapping things in the bubbles.
Kills all the pigs in a level after being summoned by Sardines.
Kills all the pigs in a level then loops back after being summoned by Koi fish.
Mighty Philadelphia Eagle
Same as Mighty Eagle except it is summoned by a rugby ball.