|"I show not your face but your heart's desire."|
Wolves are a species of canine closely related to the domestic dog. A human affected with lycantrophy will turn into a wolf-like being known as a werewolf every full moon. It appears to be a staple of the Hogwarts Defence Against the Dark Arts curriculum to teach the difference between a werewolf and the true wolf; it was a question on the 1976 Ordinary Wizarding Levels, and Severus Snape taught it as part of a lesson on werewolves during a lesson he was teaching as a substitute in 1993.
- Harry Potter and the Prisoner of Azkaban (First mentioned)
- Harry Potter and the Prisoner of Azkaban (film) (Mentioned only)
- Harry Potter and the Order of the Phoenix (Mentioned only)
- Harry Potter Trading Card Game (First appearance)