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Hi all!
Photo takien today at Łubna. Can we distinguish these gull as Baltic? What do you think about moult pace?

Michal

Only balancing or real albatrossing?

Only balancing. Today was veeeery windy

At first sight, moult does not seem very spectacular: 6-7 new primaries, while P9-10 are old and juvenile. Pretty normal for any 2nd-cycle LBBG at this time of year.
However, a closer look reveals something interesting: a slight moult contrast in the new primaries and corresponding primary coverts. If I interpret things correctly, it seems to me that moult was arrested when P1-3 had been replaced. P4-6 (and corresponding primary coverts) must have been replaced somewhat later in the year. They are still 2nd-generation feathers, like P1-3, but they look fresher, more blackish. The difference is quite clear if you look at the primary coverts.
This means that, for a moment, this bird did not have enough energy to continue moulting (after P3); maybe because it undertook a long-distance migration at that time ?

adriaens, thanks for your answer!