Bewick's Swans - Cygnus columbianus with Whooper Swans - Cygnus cygnus.
Near Hundred End, Lancashire January 2019. Up to 10 Bewick's have been seen within this herd of several hundred Whooper's, with a single juvenile Bewick's as in the final clips.
Easy here to see the difference in bill colouring between the two species.
