Werewolf

A werewolf (also lycanthrope or wolfman), in folklore, is a person who shapeshifts into a wolf or wolf-like creature, either purposely, by using magic, or after being placed under a curse. The medieval chronicler Gervase of Tilbury associated the transformation with the appearance of the full moon; however, there is evidence that the association existed during among the Ancient Greeks, appearing in the writings of Petronius. This concept was rarely associated with the werewolf until the idea was picked up by fiction writers. In popular culture, a werewolf can be killed only if shot by a silver bullet, although this was not a feature of the folk legends.