Romero zombies are the undead creatures featured in six of the films by George A. Romero: Night of the Living Dead, Dawn of the Dead, Day of the Dead, Land of the Dead, Diary of the Dead, and Survival of the Dead. These zombies conform to a set of rules regarding their actions, behaviour, motivations and causes of reanimation. The specific depiction of zombies in Romero's films has become so widely known that perceptions and depictions of them in other media tend to conform to it.