Hello, We have a pair of wild mallards who come each spring. For a couple years they have nested, laid egs but had them stolen by foxes. This year she nested quite close to the house and has been sitting on her eggs for three to four weeks. About an hour ago she left he nest and started quacking wildly in the pond. Normally she covers the eggs but this time she left them uncovered. To me she sounds distressed and it looks like she's been sick in the area around the nest. Is this normal? Do we need to do anything to help? Thanks for the advice. Quick.