I'd forgotten to post this before, but back in May I asked a visiting moth expert to set up a moth trap in one of my fields one night. It's a simple contraption really - a wooden box with a powerful light bulb that attracts moths by night. They come to the box and slide down in to the bottom. In the morning you check under empty egg boxes, where the insects are hiding from the daylight.
My knowledge of moths is quite limited, but I was astounded about just how many moths - individuals and species, were about in my fields! We didn't get a final species count, but it must have been over 25. I can't even remember their names now but the photos give an idea of the wonderful looking insects that appeared.