Looking at the gulls I found 2 colour ringed birds which I was able to find out history on from this website
Next up was a ringed adult Common Gull JYAO who was ringed also at Frogner Park as an adult on 040210 and been reported a few times since but always at the same site.
|2K Herring Gull - note the grey mantle feathers|
|1K Herring Gull|
There was also this adult Herring Gull which (for me at least) showed an usual patterning of dark feathers on the head.
Finally I turned the camera at the Tufted Ducks and managed this OK shot
|male Tufted Duck|