The Bird Upgrade is the third chapter of Angry Pigs. Below is the list of levels.
Levels[]
3-1: Red Bird's Upgrade
3-2: Meet Mustache Boomerang Bird
3-3: Meet Mustache Blue Bird
3-4: Meet Mustache Orange Bird
3-5: Meet Mustache Pink Bird
3-6: Mustache Bundle
3-7: Meet Mustache Big Bro
3-8: Unstoppable
3-9: Chain Reaction 2
3-10: Return of the Hypnotist: Part 1
3-11: Return of the Hypnotist: Part 2
3-12: Return of the Hypnotist: Part 3
3-13: The Hypnotist's Revenge
3-14: The Last Hypnotist Returns (boss)
3-15: Mustachio Birds
3-16: