The Ahool

A Cry in the Dark

"Ahooool."

In the dense rainforest at the foot of Mount Salak in western Java, this eerie call echoes through the trees as night deepens. Low, drawn out, and trailing. It matches no known animal.

Locals call the creature behind this voice the Ahool—named directly for its cry. They describe it as a massive bat-like creature that flies above the forest canopy at night and sometimes skims the surface of rivers to snatch fish.

Estimated wingspan: over three meters. Body size comparable to a grown human. If true, this would dwarf the largest known bat, the large flying fox, which maxes out at roughly 1.7 meters.

The First Western Witness

In 1925, American naturalist Ernest Bartels was resting near a waterfall on Mount Salak during an expedition into Java's interior when he had his encounter.

An enormous shadow passed overhead. Bartels looked up to see a giant bat-like creature covered in dark grey fur, gliding on impossibly large wings. It swept low over the river's surface before vanishing back into the forest.

Bartels, trained in zoology, carefully documented the sighting. He estimated the wingspan at approximately three meters and emphasized that the creature was distinctly different from a flying fox. Its head was primate-like, and its forearms were integrated into the wing structure.

The Darkness of Java

Sightings continued sporadically after Bartels's encounter.

In 1927, Bartels himself heard the characteristic "Ahooool" call again in the forests of Mount Salak. The sound came from the canopy overhead, accompanied by the heavy beating of large wings.

During the 1990s, multiple reports emerged of giant bat-like flying creatures across Java and other Indonesian islands, particularly from the rainforests of Sumatra and Kalimantan.

For local inhabitants, the Ahool is an object of genuine fear. Its name is invoked to keep children from wandering outdoors at night. But the elders insist it is not merely a cautionary tale. "It is real," they say.

Pterosaur or Giant Bat?

Two primary hypotheses exist regarding the Ahool's identity.

The first: an unknown species of giant bat. Southeast Asian rainforests rank among the most biodiverse ecosystems on Earth, and new species continue to be discovered at a remarkable rate. In the 2010s alone, hundreds of new species were identified on Borneo. While a three-meter bat remains undiscovered, smaller unknown bat species certainly exist. A lineage of oversized bats surviving undetected in remote jungle is not entirely implausible.

The second hypothesis is bolder: a surviving pterosaur. Pterosaurs are believed to have gone extinct roughly 66 million years ago, but some cryptozoologists argue that small pterosaur species could have persisted in tropical rainforests. The Ahool's reported characteristics—fur-covered body, primate-like head, forearms fused into wings—overlap partially with features of small pterosaurs.

Much of Java's rainforest remains unexplored even today. When that long, trailing "Ahooool" echoes through the night forest, would you dare look up?