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Thanks Jan - another interesting bird. The question is posed in the caption as to whether it's not a 2cy rather than 3cy LBBG; I guess that would be easier to answer if the unmoulted outer primaries weren't so worn and frayed, but can anything useful be deduced from the shape of the tip of P9 on the...

Thanks Peter - very informative and useful photos. Next time I'm at my gulling site I'll pay special attention to this feature, with a view to confirming how many other 2cy birds (if any) appear to develop adult-type inner primaries this early.

Thanks for the quick reply, Lou. Is it normal then for one-year-old graellsii/intermedius to acquire adult-type inner primaries? If so, I haven't noticed this before - perhaps I need to look harder!

Best wishes

Dominic

Hi all I'm looking for some expert input on a large gull I found at my study site of Rainham landfill, Greater London, last Friday (14th June). A one-year-old bird, in essence it seemed to have strong visual elements of both Caspian and Lesser Black-backed Gull - e.g. rather long, slender bill and v...