As Bri has said the Swans failed with their nest and moved up to the Long Pond to engage in hostilities with the Canada geese and their brood.A few years ago we witnessed a swan gripping a gosling round the neck and attempting to drown it. A few adult Canadas came to its rescue harassing the Swan and thus releasing it.
Today I thought the same scene was going to materealise. Both swans bearing down on their nemesis and battle commenced.
But it ended in just chasing the geese around for a while and they eventually made their escape further up the pond.