You can see here how neatly the grass has been clipped. The water level is quite high, so the grass is underlain by it.
The middle dam has now been reinforced with spent raspberry canes. A good deal of work has been done on the dam in the last weeks.
And just to remind you of the purpose of this blog:
An adult swam up stream, got a whiff of me from the westerly wind and SLAP! and dived. And then went about and repeated the warning. For whom?