Momma Duck has a nest!

A nest has been sighted! Around May 7 I noticed that we were only seeing 1 duck, not the mom, but I never found a nest. Now I'm wondering if that is when she began to sit on the nest. We only saw her once a week for a while after that. So if that is indeed when she started, I calculate a hatching around the weekend of June 10. That is 2 or 3 weeks later than last time.