Gwyllgi

Barghest also spelled Barguest, or Bargest, in folklore of northern England (especially Yorkshire), a monstrous, goblin dog, with huge teeth and claws, that appears only at night. It was believed that those who saw one clearly would die soon after, while those who caught only a glimpse of the beast would live on, but only for some months. The Demon of Tidworth, the Black Dog of Winchester, the Padfoot of Wakefield, and the Barghest of Burnley are all related apparitions. Their Welsh counterparts were red-eyed Gwyllgi, the Dog of Darkness, and Cwn Annwn, the Dogs of Hell. In Lancashire the monster was called Trash, Skriker, or Striker; its broad, sometimes backward-pointing feet made a splashing noise, and it howled horribly. In East Anglia, where it was thought to be amphibious, the dog had only one eye and was known as Black Shuck, or Shock. It was called Mauthe Doog on the Isle of Man. The Manchester Barghest was said to be headless.