Ahool

Appearance
The Ahool is a creature that resembles a giant bat or a large flying primate. First to be described by Dr. Ernest Bartels in 1925, it lives deep in the rainforests of Java, Indonesia. It is also described as having large dark eyes, and sharp claws on its forearms. People have also said that this creature has a body covered in gray fur. The size of its body is about the same size of a small child. However, it has a wingspan of about 12 feet, twice as long as the largest known bat, the common flying fox.

Behavior
The Ahool is said to be nocturnal and spends the daytime hiding in caves behind or beneath waterfalls. Named after its infamous cry 'AHOOOool!', it can be heard in the distance whenever it flies by.

Explanations
Cryptozoologist Ivan T. Sanderson believes that the Ahool might be a distant relative of the Kongamato in Africa. Others think that it might be a living fossil of the pterosaur, according to the description if the creature having leathery wings, but the pterosaur was reported of having downy fluff on its wings to protect them from heat loss. There also may be a more real explanation. The Spotted Wood-Owl and the Javan Wood-Owl are both native to the rainforests of Indonesia as well. Their wingspans being approximately 4 ft. It is very far from the Ahool's reported wingspan, but with stories details can get exaggerated, especially by frightened observers. This explanation can also debunk the Ahool's call, as owls have a very similar cry. We can't say anything for now with the lack of evidence that we have, but we will just have to keep looking.