I have had five sightings of these in the last week. I didn't know what they were but yesterday managed to snap one and Les identified it for me.
Also, with huge help from Les, I have now corrected and increased my checklist of butts from Rainbow Lodge and the surrounding area (i.e. South West Cardamom Mountains - although we are really on in the foot hills).
http://www.rainbowlodgecambodia.com/...inbowLodge.htm