Thankyou for the map Evan. Mike Bailey,NNR warden, says they may well have been there all the time but that area hasn't been trapped much. I did in fact find it on a stem near the MV trap and grabbed it quick. My trapping companion Dr Marc Botham suggested it was a sub angled wave in the darkness and as I hadn't seen one of those either I took it home where he immediately recognised it as a Rosy Wave. There is only one pic as I couldn't risk it flying off in our habitat and we replaced it the next day. I was also pretty thrilled to catch Shore Wainscot which is one of the easier ones to id.