Nagual

In Mesoamerican folk religion, a Nagual or Nahual (both pronounced [na`wal]) is a human being who has the power to magically turn himself or herself into an animal form: most commonly a donkey, turkey, or dog, but also other and more powerful animals, such as the jaguar and puma. Such a Nagual is believed to use his powers for good or evil accord....
Found on http://en.wikipedia.org/wiki/Nagual

nagual

personal guardian spirit believed by some Mesoamerican Indians to reside in an animal, such as a deer, jaguar, or bird. In some areas the nagual is ...
Found on http://www.britannica.com/eb/a-z/n/2
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