We got three pairs of very young mallards in November. This week they started laying. Traditionally they don’t bother with nest boxes. We have had two eggs this week; one was in the middle of the pen and the other was in a nest box. Clever girl.
Here in Spain those of us who live in the campo (countryside) have no access to mains. So some of us transport water from A to B using cubos. Big white plastic cubes. When they get damaged they are still useful.