Angry Birds Go! Wiki

This is the Ice Bird.

Ice Bird is an extraterrestrial companion to the Flock once they arrive in Space. He convinces the Flock to help him in his quest to recover the Eggsteroid. He is intent on saving his home planet from the Space Pigs, but Red is convinced he can help get them home. His power is to freeze enemies solid in an icy explosion. His powers resemble those of Iceman.

In the Game

There was a Twitter tweet which unveiled unknown concept that was discovered by a game designer named Liz Edwards. She also helped in the concepts of an Angry Birds game from there people asked if Ice Bird is in Angry Birds Go! but then she answered this: "I wish I knew! I don't have any information I was only an intern there for 3 weeks" that possibly concludes that Ice Bird could not appear in the game. [1]