Doppelgangers

Up at the boating pond in the local park.

A thin layer of meltwater on top of the ice provided a mirror film on a solid base.  This is part of a much larger flock of black-headed gulls temporarily roosting there.

More intresting to me though was a gull to the left of these ringed with a coloured darvic ring on its right leg bearing the legend JHZ1 (See 'Extra').
I have reported this and already know that it was ringed in Norway.  I may get notified later more precicely when and where.