Incredible Nest Builder

There is a new next builder in town who builds a fine looking next. The first picture is a top view of last years nest with the babies in it. The second is this years nest - built somewhat like an igloo with a small entry hole on the side. It was amazing to watch this nest being build. The bird made a bunch of trips over several days bringing in small pieces of construction material and adding it to the growing structure. The final product is quite a work of art. The only problem is, we haven't seen the birds since the nest was finished - don't know what happen to him.