Hooked nails, gliding flight, and a long, long tongue are the hallmarks of the Balbal. While its depredations are described in Tagbanua folklore, it is itself accused of hailing from predominantly Muslim Moro country. They have also been described as friendly with and indistinguishable from crocodiles.
Balbals appear before a corpse is buried. Gliding like flying squirrels or bats, these humanoid creatures land on thatched roofs and use their curved claws to rip their way through the straw. Once a hole has been cleared, the long tongue is used to lick up the corpse, skin, flesh, bones, and all. The corpse is then replaced by a banana stalk, identical to the deceased in every way except for a telltale lack of fingerprints.
Light and loud noises scare off balbals. Branches of Blumea balsamifera, known in the Philippines as sambong, sobosob, and gabon, will keep them away from a bedside. Finally, prompt burial is always effective.
References
Fox, R. B. (1982) Religion and Society among the Tagbanuwa of Palawan Island, Philippines. Monograph No. 9, National Museum, Manila.
MacClintock, S. (1903) The Philippines: A Geographical Reader. American Book Company, New York.
Ramos, M. D. (1971) Creatures of Philippine Lower Mythology. University of the Philippines Press, Quezon.