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Bal Bal an eater of the dead. It enters into graveyards and even funerals to steal corpses and feed on them. Not only is it disgusting it’s very sneaky, after it eats the dead body it places a banana trunk into the coffin to make it seem heavy. Apparently it has sharper nose than that of a dog that can smell a corpse from a large distance away and has a very foul breath.
As the legend goes the Bal Bal appears like a night bird with a distinct cry which is audible every night. The Tigbabau tribe of Philippines believes that the Bal Bal can take human shape. They can, I have seen it, it's twisted in that they will take the form of the human they just ate.
That is has a long reptilian tongue and monster nails. They can fly and sail down onto the house where someone has died, tearing up thatched roof with those nails, use their tongue to lift up or rather ‘lick up’ the corpse.
Bal-Bal is also associated to other folklore creatures like Aswang, Amalanhig, and even to Busaw, since they are all corpse eaters. It also has a unique power of hypnotizing people to sleep in a funeral so that it can peacefully eat its meal (I asked). In the old days Filipino people stayed awake all night by singing and shouting to keep the Bal Bal from taking the dead body of their loved ones.