This year I went to the marvellous Wilderness Festival for the first time, hopefully not the last. I absolutely loved it and when my 400 plus photos have finished uploading I’ll link to them below.
One thing I did was pinch my friend Helen’s bat detector and listen intently after dusk near my campsite, which was very near a river and definitely had at least one bat flitting to and fro. In the recording below I was pointing the detector up, set at 55.7MHz, and could clearly see the small bat flying overhead. I’ve had the detector for a few months at home in London and completely failed to get a confirmed sighting and hearing (seen plenty of bats and not heard them but also heard plenty of bats and not seen them) but this worked perfectly.
Given the frequency it’s likely that this is a Soprano Pipistrelle.