Big gull roost at Wheldrake Ings yesterday afternoon though I failed to pull anything out. The most interesting bird was this adult gull with dark upperparts. Structurally, it looked like an Argentatus Herring Gull, but what is it? Hybrid Lesser Black-backed Gull x Herring Gull has been suggested and that seems plausible. However, as you can see towards the end of the pic, there is very little black in the wingtip.
Any comments welcome.
Please note Wheldrake is only accessible wearing waders and as far as the bridge only due to flooding.