Glad to report that the Dippers are back to nest building to replace their previously predated clutch of chicks. I watched the female carrying nesting material, mainly beech leaves which are used to line the bowl. She was back to the "walk-up', that is to say, landing 20 feet down stream and then making her way carefully back to the nest site. All the time, pausing to check for safety before arriving on the boulder just beneath the nest. This all took place in the morning, afternoons seem to be reserved for feeding because I haven't seen any nest building other than whatsoever but always see them well away from the nest area and feeding avidly.