Herring Gull C7J68 2cy (argentatus), August 06 2002, Tampere, Finland (61.31N,23.43E).

A 2cy argentatus, ringed in Finland: white C7J68. The complete moult in summer is well underway with most wing-coverts and the inner primaries moulted to second generation. Primary P8 has been dropped and P9 is still juvenile. P1-P5 are fully grown second generation flight-feathers. As can be seen in the image, the inner secondaries are still juvenile and very abraded and bleached. 
The upper tertials and the median coverts are replaced for second generation feathers. Most of the lower lesser coverts and greater coverts are replaced as well, with the central greater coverts still growing: the gap in the greater covert row is almost closed. In the carpal edge (the outer lesser coverts) most feathers are still juvenile, these feathers can be recognized by the washed brown centres. Almost all scapulars have been replaced by second generation feathers, including the scapulars in the lowest row. In the lower upper scapulars, a few feathers have been moulted to third generation; they show a buffish brown base. 

By August, the warm tones of the first moulted feathers (inner greater coverts and inner median coverts) are faded to plain white, leaving a contrasting barred pattern on the wing-coverts. The last moulted coverts are the central greater coverts and outer lesser coverts, replaced by mid-August. In some birds, the new greater coverts may show a vermiculated, densely barred pattern. 

In the table below, the primary moult scores of 2cy August argentatus in Finland can be read: