This big-eyed beauty is called the Philippine Eagle-Owl (Bubo philippensis) and, as you guessed, is endemic to the Philippines. The locals may refer to it as the kuwago or bukao. There is not much known about this mysterious raptor, but it is presumed that they eat small mammals and birds. This assumption is made because of their extremely powerful talons. They are also the largest owl in the Philippines, with a wing-length of 14 inches (35 cm) and a total length of 16-20 inches (40-50 cm).
Photo credit: silentsnap