Siren Head is a horror creature created by artist Trevor Henderson, first shared online in 2018 as a tall, skeletal figure with sirens for a head that mimics emergency broadcasts and other unsettling sounds. The design spread quickly through horror art communities, YouTube videos, TikTok edits and indie horror games, where its siren became a shorthand for approaching danger. The murderous version heard here leans into that darker reputation, and creators still use it because the siren alone signals threat without showing the creature at all.