Okay I think

Only three cygnets left at the park. It is not clear what happened to the fourth one but there has been a suggestion that there might be a pike in the lake.
On Sunday morning, the female adult had a problem with one of her legs. A wildlife rescue centre were called but they couldn’t get near. On Saturday night, some boys were seen throwing stones at the lake so it seems likely that they hurt the swan.
However, when I saw her this morning, she seemed to be fine on the grass and in the water. A big relief, but what kind of cruel idiots throw stones at wildlife!!!