Leeneia ~ browsing back thru threads, came across our little exchange here, so did a bit of googling. In case still of interest - found that 'fairy' can often subsume 'pixie', or that the distinction is not always definitive: e.g.

Online Free Dictionary by Farlex ~~
pix·ie or pix·y (pks)
n. pl. pix·ies
A fairylike or elfin creature, especially one that is mischievous; a playful sprite.
adj.
Playfully mischievous.
[Origin unknown.]
pixy·ish adj.
The American Heritage® Dictionary of the English Language, Fourth Edition copyright ©2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

pixie, pixy [ˈpɪksɪ]
n pl pixies
(Myth & Legend / European Myth & Legend) (in folklore) a fairy or elf
[of obscure origin]
Collins English Dictionary – Complete and Unabridged © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003

~M~