At the nest this evening it was good to see the male working like a demon collecting food for his 4 chicks. What struck me was not only how efficient and skilled he was at finding food, but how much available insect life there must be. I kept a really accurate record of the time between visits to the nest. In 41 minutes from 18.11 to18.51, the male visted a total of 10 times. I have to confess that this level of feeding far exceeded what I expected. The prey being fed is larger than I expected and seems to be mainly Mayfly as I expected it would be.