Just an odd subadult(4cy) Herring Gull? Or 3cy Yellow-legged Gull at Tara 17.5.2009. Foto: Hannu Koskinen
Eyecatching feature of this bird: Bare parts much more deep yellow than on average subad HG.

Interesting moult contrast between outer p10-6 and inner ones p5-2, p1 seem to be missing. No mirror on p10.

The same bird on 21.5.2009 at Tara. Foto: Hannu Koskinen

To compere with a 3cy Herring Gull "yellow C70HJ" 17.5.2009 at Tara. Foto: Hannu Koskinen

And a 4cy Herring Gull "yellow C4N51" at Tara 17.5.2009. Foto: Hannu Koskinen