Pixies (also Pixy, Pixi, Pizkie, Piskies and Pigsies as they are sometimes known in Cornwall) are mythical creatures of folklore, considered to be particularly concentrated in the high moorland areas around Devon and Cornwall, suggesting some Celtic origin for the belief and name - akin to the Irish sidhe, pixies are believed to inhabit ancient underground ancestor sites such as stone circles, barrows, quoits, Rounds or standing stones.
In traditional regional lore, they are generally benign, mischievous, short of stature and attractively childlike; they are fond of dancing and gather outdoors in huge numbers to dance, or sometimes wrestle, through the night, demonstrating parallels with the Cornish plen-an-gwary and Breton Fest Noz (Cornish: troyl) folk celebrations originating in the medieval period.
In modern times they are usually depicted with pointed ears, and often wearing a green outfit and pointed hat. Sometimes their eyes are described as being pointed upwards at the temple ends. These, however, are Victorian Era conventions and not part of the older mythology.
In modern use, the term can be synonymous with fairies or sprites, however in folk lore there is a traditional enmity, and even war between the two races.