After some searches on the internet I discovered someone close by who wanted to sell some ducks and got in touch. She responded and came to look at the garden and pond. She was very fond of her ducks and wanted to make sure they were coming to a good home. She liked the pond and give me advice on building a fox proof shelter.
These ducks have been reared in a pen in a garden and have not had to forage for food consequently I assumed that they would need help to survive in the more dangerous world of the pond and its environs. But their behaviour since coming out of the pen was as if they have never been in captivity. I think they are probably better able to looking after themselves than I thought and I am heartened by the fact that they get into the water if there is any sign of danger i.e me. I think I have quite a lot of watching to do in order to learn what I have to do to help them survive and flourish.