I was visiting last weekend our summer place at lake Inari in Lapland. We have five nest boxes on our ground and four of them were occupied. I was lucky to see how the chicks jump out from the box. I noticed that a female bird was behaving in a weird way, swimming in circle and making some noise. Actually she was asking chicks to come out. They jumped out one by one, very quickly. She counted them, and immediately when all six were in water the goldeneye started to swim out from the coast line. The chicks followed, of course. The whole episode took only about two minutes. Impressive!