How to play Early BirdZ

About Early Bird: Classified, from BoardGameGeek:

This expansion for Early Bird includes two new game modes Early BirdZ - a zombie worm is in the loose! Adds some bite to your work hunt and a new bird brained path to victory. Early Birds Aren't Real - We're being watched. There's a robot among us. Can you find the truth in time? Adds a social deduction game mode with secret role cards.