We monitor the progress of the laying birds to make sure the nests are not predated by crows and magpies and as sometimes happens, the "newly weds" take a while to get the hang of it and create "egg dumps" where lots of different birds lay in the same nest . When this happens or when the nest is at severe risk, we take the eggs and incubate them and rear the babies ourselves.
We sometimes remove the duck and her babies as soon as they are hatched and put them in an enclosure to keep them safe until they are big enough to put back on the ponds, this is especially important with the Teals as the babies are so small and extremely vunerable. The Geese and Swans are normally perfectly capable of looking after their own offspring and because they are "grazers" they are better off left alone.
Spring is a very entertaining time here, with all the waterfowl in their best breeding plumage, displaying and showing off to each other, and looking for suitable places to nest whilst making sure that nobody else "muscles in" on their territory.