A gorgeous morning, lots of open water. Adam was just leaving as I arrived, reporting marsh harriers, sparrowhawk, 4 little grebe. Harry turned up a bit later, in time for some great hunting action. Both marsh harriers were on patrol, one of them hovering what looked like just above some remarkably unperturbed mallards, but when she dropped it was into the reeds just beyond the water, so the ducks had clearly calculated the angles. Alan had a lovely male merlin yesterday, settling in the scrub just in front of the hide. Otherwise usual stuff.