These mischievous goblins from the north of England can change their shape, and though usually equine, also take the form of a cow with a white flag around its neck, an ass, or if it suits their mood, a naked man flapping a white sheet, a chanting girl, or a giant, white singing cat.

They live in rivers and lakes, and the aim of their transmutations is to lure passers by into the water for amusement.