Siren Head was created by Canadian horror artist Trevor Henderson and first shared online in 2018 as a tall, skeletal figure with two sirens in place of a head. The design spread quickly through horror art, fan videos and short-form clips, where its sirens became shorthand for an approaching, unseen threat. It later appeared in fan-made games and countless edits, and it remains popular because the sound alone suggests danger without showing the creature, making it easy to reuse in horror, Halloween and creepypasta-style content.