Gull ID, UK 18 Aug 21 (1 Viewer)

[GMS]

Not sure on this one as mixed features to me. Wide tail band but broken in outermost tail feathers. Rump white but still well marked. Overall dark wings with only very faint primary window. Size as Herring Gull. Bill chunky and all black. Herring Gull doesn't fit, no pronounced primary window, only inner greater coverts well marked. Structurally it didn't fit LBB Gull but maybe wing pattern best for it? Typically they seems to be a lot more uniformly coloured at this time of year. YL Gull was initial impression but tail maybe too well marked and tail band broken in outer tail feathers. So any pointers would be much appreciated.

 

[Ratal]

Juvenile Yellow Legged for comparison per Birdguides.com

 

[smiths]

Hi, I would say Lesser Black-backed Gull.
In addition to the features you have already mentioned, the overall cold, dark chocolate brown colour of the wings looks better for this species (whereas Yellow-legged often looks a bit rustier, more tawny brown) and so do the dark underwing coverts and fairly small bill.
Some birds are extremely tricky though, e.g. :

Gull Research Organisation

Gull website with many species / taxa. Comparison of plumage month by month.

gull-research.org

 

[HH75]

Hi, I would say Lesser Black-backed Gull.
In addition to the features you have already mentioned, the overall cold, dark chocolate brown colour of the wings looks better for this species (whereas Yellow-legged often looks a bit rustier, more tawny brown) and so do the dark underwing coverts and fairly small bill.
Some birds are extremely tricky though, e.g. :

Gull Research Organisation

Gull website with many species / taxa. Comparison of plumage month by month.

gull-research.org

Hi Peter,
That's a scary bird! It would be easy to overlook that as a Lesser Black-backed Gull if it turned up here, with only the extent of scapular moult in August strongly hinting at the true identification.