Pouring with rain early afternoon so thought I would have a go at the tunnel.
Treacherous conditions in there with snow having blown all the way through and dripping wet from the roof - but I gave it a go hanging on to the walls.
I managed with difficulty to find 7 Heralds. 3 on the roof and 4 in the wall cracks. How strange - they were all covered in minute due drops so wonder how they are able to survive in these conditions (??)
Still fantastic moths to see.