“A relentless many-fanged beast that hunts in packs, named for the dreadful 'ao-ao' cry it makes as it runs down its prey.”
Ao Ao is hunger given a name — and the name is the sound of the hunt. Sixth of the seven cursed sons of Tau and Kerana in Guaraní myth, he is pictured as a monstrous peccary or wild boar, in some tellings a horned sheep-like beast, with long fangs, sharp claws, and a diet of exactly one thing: human flesh. He is lord of the hills and mountains of the Guaraní world, and his cry as he closes on his prey — ao ao, ao ao — is the last sound his victims hear.
In a mythology thick with monsters, Ao Ao is the pure predator. His brothers rule other domains of dread; Ao Ao simply hunts, tirelessly and without appetite for anything else, in some traditions at the head of a pack of his own offspring. He cannot be outrun and he cannot be outlasted. The myth's single mercy is botanical: one tree in the forest can save you, and every Guaraní child once knew exactly which one.
The Legend
The seven brothers begin with an abduction. Tau, the spirit of evil, took Kerana, the beautiful daughter of Marangatu, and for the crime the high goddess Arasy cursed their union: the seven sons born of it came into the world as monsters. The sixth was Ao Ao, the devourer. Where his brother Jasy Jateré lures children with beauty, Ao Ao runs his victims down — a beast that hunts by endurance and does not stop, however far its prey flees through the hills it rules.
The chase has one exit. A victim who climbs a palm tree is safe: the palm is held sacred, and its roots hold fast against him. Any other tree is a trap — Ao Ao circles it, howling, then digs out the roots, brings it down, and devours whoever sheltered in the branches. Only the palm confuses and defeats him; baffled at its foot, he eventually abandons the hunt and goes to find easier prey.
The Record
Guaraní mythology was carried orally, and the seven sons of Tau and Kerana are its best-preserved survivors: ethnographers note that even where lesser gods faded from village memory, these seven held their place in the storytelling of Paraguay and the wider Guaraní world, with belief in some persisting in rural areas into modern times. Ao Ao appears wherever the cycle is recorded — in folklore collections, in Paraguayan cultural journalism, and in the standard tellings of the national canon.
Because the Guaraní kept no script, Ao Ao's documentation is post-conquest by necessity, living in compilations of Paraguayan legend, Guaraní-language cultural material, and scholarship on the mythology's structure, where he is consistently listed sixth-born and identified as guardian of hills and mountains. The sound-name is part of the record too: 'ao ao' is the creature's cry made into a word, one of mythology's cleaner pieces of onomatopoeia.
The Lore
The palm-tree rule gives the myth its teaching edge: in the forests and hill country of Paraguay, knowing your trees is survival, and the story loads that knowledge with terror. The shape of the fear is legible too — a tireless, pursuing devourer of the uplands, in country where great predators were real — while his office as lord of hills and mountains polices altitude itself: the high country belongs to him, and travelers cross it as guests.
Ao Ao keeps dark company in the cycle: in the grimmer versions of his brother's tale, Jasy Jateré hands over the children he abducts, and it is Ao Ao who eats them. He remains a fixture of Paraguayan cultural identity — invoked in legend collections, children's warnings, and the general habit of naming the country's fears in Guaraní — the man-eater every Paraguayan child can still imitate, two syllables at a time.
Field Notes
- ✦ Climbing a palm is the sole proven means of escaping it.
- ✦ Said to dig out the roots of any other tree to reach its prey.
- ✦ Its repeated cry — 'ao ao' — gives the creature its name.
- ✦ Sixth of the seven cursed sons of Tau and Kerana, and guardian of hills and mountains.
- ✦ In dark variants of the cycle, it devours the children abducted by its brother Jasy Jateré.
Case File
- Classification
- Guaraní monster (sixth son of Tau and Kerana)
- Category
- Beast/Hybrid
- Territory
- Paraguay (Guaraní heartland)
- First Sighted
- Guaraní mythology
- Habitat
- Hills and high ground
- Reported Size
- Large peccary- or sheep-like
- Also Known As
- Aoao · Lord of the hills