A kidnapper on the loose

This should have been a series. Here detects the juvenile of a black-backed gull that he will not be able to get away with one of the cygnet, with his life. In a fraction of a second later the swan (the mother) left almost free from water (was a bad shot), but the gull got away. But that did thankfully the cygnet too. There are still 8 cygnets.
Otherwise it was a lot of fighting about the food that was given. The tufted ducks have no respect for mallards and chases them often.