Several reports today that the eggs have hatched and that the cygnets have been seen by a few observers. I was at the nest at 16:30 and stayed for about 90-minutes. When I first arrived the nest appeared abandoned and the swans were gone. I waited more than 30-minutes before Marie and Pierre came leisurely swimming from around a corner at the far side of the pond and eventually came back to the nest.
Pierre climbed up on the nest and started adding sticks and leaves to it while Marie swam around looking somewhat confused. Her wings were elevated, as this photograph shows, and they stayed that way the whole time I watched her. After a while they left the nest without ever actually sitting on it and never attempted to uncover eggs - that seem to be gone now. They swam around the far side of the pond and then disappeared around the corner again.
One woman told me she had seen a cygnet under Marie's wing and I think it's possible that she has one or more cygnets tucked under those elevated wings.
Monte