In Aymara belief, the achachila are spirits that live underground in the mountains and who send rain, hail, or frost. They appear in the guise of old men.
- Buechler, Hans C.; Buechler, Judith-Maria. (1971). The Bolivian Aymara. New York: Holt, Rinehart, and Winston, p. 71.
- Leach, Maria, ed. (1984). Funk & Wagnalls Standard Dictionary of Folklore, Mythology, and Legend. New York: HarperCollins.