Boggarts

Malicious household spirits of Scotland and Lancashire, these little creatures are dark and hairy with meddling fingers, clumsy feet and simple minds; they have long yellow teeth and dress in tattered clothing. After dark, they may tip over milk jugs, break the cords of window sashes, put hens off laying, frighten cats, cause dogs to bark senselessly, slam doors, leave taps running, block gutters, blow out candles, and awaken sleeping babies by tweaking their noses. Attempts to try and escape from a boggart infested home are usually fruitless, as the creature tends to hear about it and will travel along with the family to the new house.

Boggart - Brownies that have turned evil.