An instrument used by the monks' boss to conjure wild wolves to fiercely attack his foes. While using this item, orange notes will be displayed giving spawn to 1 wild wolf each time it is used. There is a chance that red notes will be displayed destroying this item.
It was officialy stated by CM Ogrey that the Wolf Whistle does not exist. It is simply another name for a Wooden Whistle. It was used by some fansites as a competition reward, but it is still the same item obtainable in game.