The wendigo comes from Algonquian folklore of the northern forests of North America, described as an emaciated spirit linked to winter, hunger and cannibalism. The figure entered wider horror culture through literature, film and games, where its cry is usually imagined rather than documented. Online, screech clips like this one are shared on soundboards and reused in horror edits, games and creepypasta videos. Their popularity comes from that mix of folklore and an instantly recognisable, inhuman scream.