One of this lister’s favorites. The mythos surrounding this monster varies with each tribe of the Algonquian languages, among which tribes are the Cree, Ojibwa, Montagnais and others. As cited on Wikipedia is the Ojibwa description of the Wendigo:
“Gaunt to the point of emaciation, its desiccated skin pulled tautly over its bones. With its bones pushing out against its skin, its complexion the ash gray of death, and its eyes pushed back deep into their sockets, the Wendigo look"