What gorgeous ducks. All look domestic too not wild. I do see a Muscovy. Well ducks don’t need a nest to lay an egg sometimes they just drop it out as they are passing by. As you have found out. Duck eggs are delicious and are wonderful for baking with so pick them up and use them. And some ducks lay year round especially if they are in their first year. Did someone buy the ducks and put them on the pond or have they been dumped there by poeple who didn’t want them any longer?