This duck was sitting on her clutch of eggs in a nest she had made in a hollow in a very large, beautiful willow tree. The hole giving access to the hollow was in excess of metre up the tree trunk. The tree was standing in an open playing field next to a hockey club and there were lots of people about. My granddaughter looked in the hole and was amazed at what she saw, as was I. The duck had nested on top of several empty plastic bottles, discarded in the tree hole, but she seemed very happy and comfortable. I hope she remains undisturbed and successfully raises her family.