We were privileged to watch this species engage in wing-rubbing activity. Male hairstreaks have patches of specialised wing scales - 'androconia', located on their upperside forewings. Sacs at the base of these scales contain pheromones. Apparently rubbing the wings together helps to disseminate these pheromones, which attract females and induces them to mate. I attempted to video this activity, but it didn't work, so I've attached a link to a brief movie to illustrate it instead.