Blue Clipper Butterfly(Parthenos sylvia lilacinus).
The Clipper (Parthenos sylvia) is a species of nymphalid butterfly found in South and South-East Asia. It is species found mostly in forested areas. The Clipper is a fast flying butterfly and has a habit of flying with its wings flapped stiffly between the horizontal position and a few degrees below the horizontal. It may glide between spurts of flapping.
Species: P. sylvia lilacinus.