These nursery groups, or creches, provide protection for the chicks (safety in numbers) and teach them how to work as a group (important during migration). Usually one pair tends the crèche while the other parents remain nearby.
Many thanks for all your views,comments and favs,always much appreciated.
They are very good at looking after their young. Im afraid that means too many Canada geese in Bedford. Your photo illustrates your explanatory narrative so well.