El Silbón ('the Whistler') is the signature ghost of Venezuela's Llanos grasslands — the vast semi-arid plain that stretches across Apure, Barinas, Guárico, and Portuguesa states into the Colombian Orinoco basin. The tradition, active since at least the early nineteenth century, describes a tall, emaciated male figure that wanders the Llanos at night carrying a sack of bones — said to belong to his own father, whom he murdered — and whistling an eerie seven-note ascending tune that is louder the farther away he is and barely audible when he is close.
According to tradition, El Silbón was a wealthy young plainsman who killed his father in a dispute, cooked his father's entrails, and served them to his mother; the mother, discovering the crime, cursed her son to wander the Llanos carrying his father's bones for eternity, tormented by dogs and unable to approach any living soul. The legend functions in practice as a behavioural warning for gauchos working isolated cattle-posts: to hear El Silbón's whistle in the distance is said to be a warning of approaching threat, but to hear it close is said to be fatal. Dogs' aggressive barking at empty spaces is attributed to their detection of his presence.
Venezuelan folklorist Julio César Sánchez Olivo catalogued more than 200 first-person Silbón accounts between 1955 and 1985, primarily from cattle workers in the Apure and Barinas hato (ranch) systems. Reports follow a remarkably consistent pattern: a seven-note whistle heard at increasing volume as the listener walks the llano alone at night, accompanied by the distant sound of bones rattling in a sack. The tradition has expanded into Colombian territory — particularly Casanare, Vichada, and Meta departments — with identical reports. Modern Venezuelan cultural programs preserve the Silbón as a centerpiece of national oral tradition, and the figure appears in every major anthology of Latin American ghosts published in the past forty years.