Phasma is derived from the Greek word for "Ghost" as these wonderful insects are mimicry and camouflage experts. These images were taken on a rainy night walk the other evening behind SaiKung.
This is actually a Twig insect (Neohirasen sp.) and you can see the sexual dimorphism (difference) between the much smaller male on the back of the larger female, as they are mating.
These insects are nocturnal, but can be seen during the day. They feed on leaves, with their chewing mouthparts. They protect themselves by blending in and hiding, and have been known to drop legs as a defensive measure as well!