Willo the Wisp beech wood in Oxfordshire, near the director's home. Kenneth Williams provided voices for all of the characters. The principal narrator, Willo the Wisp, was a blue, floating creature drawn as a caricature of him, while the name refers to the ghostly light will-o'-the-wisp from folklore. The other main characters were Arthur the caterpillar (as a gruff cockney), Mavis Cruet, a plump, clumsy fairy with an erratic, magic wand, and the principal antagonist, Evil Edna, a witch in the form of a walking, talking television set who could zap people with her aerials. Other characters included Carwash, a snooty bespectacled cat
Will-o'-the-wisp as fireflies. Light reflecting off larger forest dwelling creatures could explain the phenomena of will-o'-the-wisp moving and reacting to other lights. The white plumage of Barn owls may reflect enough light from the moon to appear as a will-o'-the-wisp; hence the possibility of the lights moving, reacting to other lights, etc. Ignis fatuus sightings are rarely reported today. The decline is believed to be the result of the draining and reclamation of swamplands in recent centuries, such as the formerly vast Fenlands of eastern England which have now been converted to farmlands. Will-o'-the-wisp In folklore, a will-o'-the-wisp, will-o'-wisp or ignis