Shrieker Zombie

Shrieker Zombies are a new variant of zombie found in the new map Shangri-La. They have a blue glow to their appearance and blind the players by shrieking at them.

Trivia

 * The achievement/trophy Blinded by the Fright is earned by killing one of these zombies while they are blinding you. The achievement/trophy's name is a reference to the song "Blinded by the Light" by Bruce Springsteen.