A picture of an aswang?

While driving home this evening, I was listening to that old favorite of mine, Art Bell, on the radio. He recently began broadcasting from the Phillipines where he has relocated to be with his new wife, and he was talking about a mythological creature called an aswang, which is actually the name of several types of creatures as I found out from Wikipedia:

Aswang
An Aswang (or Asuwang) is a ghoul in Filipino folklore. The myth of the aswang is popular in the Western Visayan regions such as Capiz, Iloilo and Antique. The trademark or major feature of Aswangs which distinguish them from other Filipino mythological creatures is their propensity to replace stolen cadavers with the trunk of a banana tree carved in the cadaver's likeness. They are also said to like to eat small children. Their favorite body parts are the liver and heart. Other local names, especially in Capiz are tik-tik and wak-wak.
Genre
Aswang, at times is also a generic term applied to all types of mythological creatures, ghosts, manananggals, witches, shapeshifters, lycanths and monsters. Aswang is often interchanged with manananggal, but they are different. There are also characteristics and features that the Aswang also varies from Filipino to Filipino. The paragraph below is more common or a typical description of the aswang
Capiz
With respect to Aswang, Capiz (a province on Panay island) is the subject or focus of many Aswang, and other types of mythological and folkloric ghosts (multo), goblins, ghouls, manannagal, witches (mangkukulam), giant half-horse men (tikbalang) and other monster stories, especially for tabloids. Capiz is (unfairly) rumored to have a number of aswang and covens of witches. Superstitious folk who believe in their existence can still be found in these parts. They typically adorn windows, rooms, etc. with garlic bulbs, holy water, and other anti- aswang paraphernalia. which supposedly repels these creatures. Aswangs have the ability to transform into other shapes like a dog, a bat and a snake.
Superstitions
The myth of the Aswang is popular in the Visayan region of the Philippines, specially in the western provinces of Capiz, Iloilo, Antique. Aside from entertainment value, mothers are said to tell their children Aswang stories to keep them off the streets and keep them home at night. Similar to Count Vlad III Dracula of Transylvania in Vampire stories, the most popular characters are the clan of Teñente/ Tenyente/ Tiniente Gimo of the town of Dueñas.
Appearance and activities
An aswang is a regular townsperson by day and prefer an occupation related to meat, such as butchery or making sausages.
Aswangs have an ageless appearance and a quiet, shy and elusive manner. They can be distinguished from humans by two signs. One is the bloodshot eyes from staying up all night looking for opportunities to sneak into houses where funeral wakes are being held, and stealing the dead bodies. According to the elderly, the Aswang can also transform from human to animal and animal to human. The Aswang can disguise him/herself as a pig, dog or a black bird. Supposedly if a person looks at them in the eyes, the reflection would appear inverted. During their nocturnal activities, they walk with their feet facing backwards. One type is the tik-tik which transforms into a huge bird at night and prowls. The tik-tik looks for a sleeping person. Then extends a very long proboscis into the unsuspecting victim and proceeds to suck the blood. While performing, a 'tik-tik' sound is heard. In some stories, the tik-tik is an aswang's familiar, said to confuse people by its 'tik-tik' sound. If the aswang is near, the sound would be faint so that people hearing it would think that the aswang is still far away. The term wak-wak or wuk-wuk is frequently used for the same creature in the Cebu region. The legends of the wak-wak and tik-tik are much the same, but the wak-wak is specifically supposed to change into its birdlike form by leaving behind its lower body, much like the Manananggal, another Philippine vampire. The cry of a night bird which makes a "wuk-wuk-wuk" sound is believed to be the call of this monster and is feared by superstitious villagers. As with the call of the tik-tik, the wak-wak is believed able to make its cry sound distant when the creature is near. In a certain town of Capiz (Panitan), another type of aswang is believed to exist, which they refer to as the Dangga or Agitot. This type of aswang is typically funny because some say it is a handsome gay man that hunts women during the night and eats fresh blood like a vampire. But its existence cannot be properly supported by evidence. Another familiar is the sigbin or Zegben. Some say that this is another form that the aswang transforms into and yet some say it is the companion of the tik-tik. It appears to be similar to the chupacabra and Tasmanian devil in appearance with the exception of spotty fur. It supposedly has a wide mouth with large fangs.
Some people not familiar with the local wildlife of the Phillipines will confuse the legendary Aswang with the very real fruit bats of south east Asia. See this purported image of an aswang, and compare it to this image of a fruit bat in flight.

Dealing with Aswangs
It is said that an Aswang can be revealed, with the use of a bottle of a special oil made from coconut and mixed with certain plant stems upon which special prayers were said. When an Aswang comes near or walks outside the house at night, the oil is supposed to boil and continue boiling until the aswang leaves the area. They are also said to abhor garlic.