Analysed the bat detector recordings from the edge of the campsite last week. Approximately 4 hours of recording yielded plenty of Noctules but little else. Only 2 Common Pipistrelles and just a single Soprano Pipistrelle. With so few hits on the detector, I'm relieved I wasn't listening real time! Took about 1 hour to analyse via the PC. One or two of the Noctules were calling at really low frequency, that could probably be heard by my children. Will post the Noctule's sound files here when I get a chance.
Had hoped to go out in search of Lesser Horseshoe Bat which is common in Clwyd, but a real mega in Cheshire. Figured I had a chance on a patch of Cheshire where the border is on the Welsh side of the Dee in case the Dee is a barrier to their spread. Unfortunately, the weather was very cold and showery and I didn't get the chance to put my theory to the test.
Thanks To Ed for the info about the poppy like crop. I suspect it was Linseed.. If I said it was Opium, no one will ever believe anything that is written on here! | 
