adult Yellow-legged Gull.

Whinney Hill Tip/Fishmoor Res, Lancs, UK.

17-18.01.03.

Gull enthusiast Dick Newell kindly commented as follows;

"I can’t see anything wrong with your gull for michahellis. Structurally it looks right (a lot of the rear end out of the water), the head and bill shape look right (flat-topped head, stubby bill), the grey-shade looks right the pattern of black on the primaries looks right (black extending to a complete band on P5). The single mirror on P10 is typical.
I would not like to speculate with this is a Mediterranean bird or an Atlantic bird – but some sort of mich certainly."