A quick visit to the River Thames by Chiswick Eyot at last knockings on Tuesday evening revealed two 2cy Yellow-legged Gulls among just 25 large gulls. I've been really impressed by the turnover of birds here; both of these are new individuals that I'd not seen before. The usual tactic of lobbing out a loaf of wholemeal brought them to within a few metres at times, but the light was too far gone for any flight shots.
2cy Yellow-legged Gull (bird #1), Chiswick, 16 August 2016
2cy Yellow-legged Gull (bird #2), Chiswick, 16 August 2016
Comparison of 2cy Yellow-legged (left) and Herring Gulls, Chiswick, 16 August 2016