A banshee is a mythological creature that appears in Irish folklore and fairy tales. Banshees are female spirits that supposedly wail just before a family member dies.
Have you ever heard the phrase "scream like a banshee?" Sometimes people say this when a child is shrieking or a stranger yells loudly. In Irish mythology, a banshee was a type of fairy who would keen, or wail with grief, to mark a person's impending death. If you lived in Ireland long ago and heard three spine-chilling cries in the night, you might think it was a wild animal...or maybe a banshee.