More Bitterns... :-)
The above is a video-grab from the following video taken at the marston corner of Stewartby Lake.
Also seen today:
Cetti's Warbler, Little Egret, Water Rails, male Pintail all in the marston corner of Stewartby Lake and a total of at least four Bitterns. I missed two Bewick's Swans which were seen on the lake, probably whilst I was trying to video the Bitterns...