Headcrusher Terror Bird Morph in Throne & Liberty To unlock the Headcrusher Terror Bird Morph in Throne & Liberty, complete the One Flew Over the Terror Bird's Next quest in the Nesting Grounds Exploration Codex: Talk to the wandering chef Trevor at the highest point of Starlight Observatory Ruins Collect Chief Terror Bird Eggs in the giant southern nest by using Glide Morph from the highest point of Starlight Observatory Ruins Return to wandering chef Trevor