The aswang is not one creature but a family of them: a shapeshifter that lives as an ordinary villager by day — quiet, polite, keeps to itself — and hunts by night as a dog, a pig, or a bird. It is the Philippines' apex folkloric predator, and unlike most entities in this archive, entire provinces will tell you matter-of-factly that theirs is real.
Its signature is auditory misdirection: the tik-tik call grows softer as the creature closes in and louder as it retreats, so you run toward it when you flee the sound. It prefers the sick, the pregnant, and the newly dead, and a long thin proboscis lets it feed through gaps in nipa walls and floorboards.
Countermeasures in the record: salt, garlic, ginger, a stingray-tail whip (buntot pagi), and daylight. An aswang forced back into human shape is said to be identifiable by inverted reflections in its eyes.