As far as I know, this bird was first reported on the Nene Washes near Whittlesey on 27 Oct. It moved to Heron Meadow (near the eatern viewing platform) at Ferry Meadows on Friday 30 Oct and was seen and photographed by lots of people. It left, presumably to roost, about 16:20 but was back again in the same sort of area early Saturday morning. I got there around 9-9:30 and it was right at the eastern end of the meadows, nearest to Butterfly Bridge feeding amongst tussocks of rushes in a fairly dry corner. It is reported to be back again today (Sunday, 1st Nov) in the same area.
Although this is now a regular visitor to Britain, being reported every year in small numbers, it is still pretty exciting and the first time one has bee seen in the Country Park!