In Algonquian folklore, the wendigo or windigo is a cannibal monster or evil spirit native to the northern forests of the Atlantic Coast and Great Lakes Region of both the United States and Canada. The wendigo may appear as a monster with some characteristics of a human, or as a spirit who has possessed a human being and made them become monstrous. It is historically associated with cannibalism, murder, insatiable greed, and the cultural taboos against such behaviours. The legend lends its name to the disputed modern medical term Wendigo psychosis, which is considered by psychiatrists to be a form of culture-bound syndrome with symptoms such as an intense craving for human flesh and a fear of becoming a cannibal. In some Indigenous communities, environmental destruction and insatiable greed are also seen as a manifestation of Wendigo Psychosis.
Alternative spellings: Wiindigoo (the source of the English word, from the Ojibwe language),Wendigo, Weendigo, Windego, Wiindgoo, Windgo, Weendigo, Wiindigoo, Windago, Windiga, Wendego, Windagoo, Widjigo, Wiijigoo, Wijigo, Weejigo, Wìdjigò (in the Algonquin language), Wintigo, Wentigo, Wehndigo, Wentiko, Windgoe, Windgo, Wintsigo and wīhtikōw (in the Cree language); the Proto-Algonquian term was *wi·nteko·wa, which probably meant "owl" in their original language.Windigoag is a plural form (also spelled Windegoag, Wiindigooag, or Windikouk)
The Wechuge is a similar being that appears in the legends of the Athabaskan people of the Northwest Pacific Coast. It too was cannibalistic. However, it was not so much insane as enlightened with ancestral insights.