A Common Blue Jewel (Rhinocypha perforata perforata) perching on a leaf at Tai Po Kau, Hong Kong. The metallic green and purple reflective rectangular windows in the blackish tip of its wings looked very attractive.
I was quite happy with this photo as it required a lot of persistence and great luck - the damselfly perched high up, light was very limited, and the wind wasn't co-operating at all!