Revontulet is the Finnish word for “Foxfire.”
According to Finnish lore, a mystical fox was thought to have created the Northern Lights, with its’ bushy tail kicking up snow and tossing up sparks into the dark, night sky.
Source & Reference:
Elias Lõnnrot, Kalevala Finnish European Classics. ©2013
Illustration of Finnish Fox in Public Domain, artist unknown.