Do you have your ponds fenced to stop otters from getting to the ducklings?
I've watched otters hunting ducklings on Scoulton mere, which is an SSSI, they are quite something to watch when they are hunting, quite relentless. Not a single duck in residence by the autumn.
Very luck really - our ponds are not on watercourses
Our couple of small lakes are just from modest streams / brooks
