Asian Owl Moth Brahmaea tancrei
The larvae are decorated with long, knobbly and curling thoracic spines, which are shed in the final instar. They feed on Privet. The moth is marked with map-like contour lines, with large dark central areas.
Larvae become very active before pupating, they take on a different pre-pupating appearance and wander for some time. At this stage they escape very easily, so ensure the cage is secure. A base of compost or soil is required. The larvae don't burrow, but look for a flat surface under which to settle and pupate.
See the pictures to appreciate the interesting life history.
Highly recommended as a fascinating species to breed!