Mallard ducklings at Bosherston

I saw my first Mallard ducklings of the year this morning, five with their parents at Bosherston. All of the ducklings were dashing about flycatching (see record shot above), while the adults were diving (staying submerged for several seconds) for food. I have seen adult Mallards diving for food at both Bosherston and Orielton before, but I believe thatthis is quite unusual behaviour for a dabbling species. That being said - I have not noticed ducklings flycatching before either.....