When the birds had left, and because I have seen that they are away from the area for around 20 minutes, I quickly went down to the nest to check if there had been an egg laid. Not yet! I quickly tok a photo for the diary and was back on the bank and well away after just 30 seconds or so. In the photograph you can just about make out an entrance hole at the front. The nest is made mainly of moss and roots and is very well camouflaged.