If they are living out at the pond, they will make nests there and try to hatch eggs. You may think you are missing a duck and then a month later there she is with babies!
Ducks lay in the morning, so if they are in a pen/shed overnight and you don't let them out until after they lay, less chance of them hiding a nest.
Ducks lay in the morning, so if they are in a pen/shed overnight and you don't let them out until after they lay, less chance of them hiding a nest.