Angry Birds: Evolution

In this game birds can evolve into other birds.

Story
The birds find a machine and the Red Bird goes inside and when he comes out he is a Spike Bird. The pigs were watching and want to see if it could help them steal eggs.

Birds
Red Bird--->Spike Bird--->Claw Bird

Blue Birds--->Qwerty Birds--->Sonic Birds

Yellow Bird--->Lightning Bird--->Shockwave Bird

Bomb Bird--->Mega Explosive Bird--->Ultra Explosive Bird