Goosander, a fish-eating duck, can be found on the river in the winter.
From the independent.co.uk
As she flew away a late goosander skimmed past, downriver-bound.
From the guardian.co.uk
Recent sightings have included a red-headed goosander, great white egret, a squacco heron and three ravens.
From the independent.co.uk
I am unsure whether this was due to the extreme weather or not but just as the last of the storm was clearing away, I was very fortunate to see a group of seven goosander using the main pool.