The description of its appearance - flying fiery ball, something flying fast - in many cases resembles some of that attributed to a UFO.
In Latvian myth, Pukis is a flying household spirit bringing its master the goods stolen somewhere else. You can buy or breed it. There are also spells to "tie it down", so you can take it over from its master. Pukis is very much of a fetish, one must treat it right otherwise it will either leave the master, die or do the master some harm. It can be compared with the Finnish Para and the Lithuanian Aitvaras.