The Colo Colo or Colocolo, is a malevolent creature from mapuche folklore.
The Colo Colo are born from an egg that was incubated by a rooster.
The Colo Colo's aspects differ slightly according to which zone of Chile. In Mapuche the Colo Colo has a serpent form and can be transformed into a rat with feathers. Whereas in the south of Chile, the Huilliche culture represents them as a long mouse with the head of a rooster.
The Colo Colo feed by taking the saliva from sleeping people. Commonly living in the corners or cracks of houses; the malignant creature would be identified as living in the home by listening for an animal that cries like a new born baby.
- Ernesto Wilhelm de Moesbach. Voz de Arauco: explicación de los de los nombres indígenas de Chile. Imprenta San Francisco, 1944. (Spanish).