Trevor Henderson is a Canadian horror illustrator, writer, and creature designer best known for creating Siren Head, one of the most recognizable monsters in modern internet horror. He rose to prominence through his haunting photorealistic artwork, which blends everyday locations with terrifying original creatures and has inspired millions of fans worldwide. In addition to Siren Head, Henderson created popular internet cryptids including Cartoon Cat and Long Horse. His work has had a significant influence on analog horror, found footage storytelling, and online horror culture, while also inspiring books, indie games, and numerous fan projects.