Siren Head is a hostile cryptid and urban legend created by the artist Trevor Henderson. Siren Head itself is a 40-foot-tall humanoid creature with a heavily emaciated, near-skeletal frame covered in dried, mummified flesh the color of rusty metal. It's limbs are disproportionately long and thin, with arms as long as it's legs, ending in huge, bony hands. Where it's head and neck would be is a thin pole of flesh with two sirens attached to them (hence the name), and several black wires snaking around it's "neck" and into it's upper shoulders, pressed against it's abdomen. These speakers are the only metal parts of it's body, fused to the neck by tendrils of skin and capable of swiveling around it much like the head of an owl. Some images depict Siren Head's speakers with toothy, lipless human-like jaws and a long, retractable thin snake-like tongue.
Trevor Henderson said: though the teeth are only visible on a certain radio frequency.