(3 images) Herring Gull J10S2cy (argentatus), July 09-16 2003, Tampere, Finland (61.31N, 23.43E).

A 2cy argentatus, ringed in Norway J10S. The complete moult is much delayed with most wing-coverts, all rectrices and the outer primaries still juvenile. Primaries P5-P10 are still juvenile. The general moult stage is more in line with N-French argenteus from June and also doesn't fit in the general argentatus picture from Tampere, as the tables show.

By July, the warm brown tones of the first moulted second generation feathers (inner greater coverts and inner median coverts) are faded to plain white, leaving a contrasting barred pattern on the wing-coverts. On average, 2cy argentatus is more contrastingly patterned than same aged 2cy argenteus, especially regarding the pattern on the central greater coverts. However, some argentatus are distinct "washed out" brown, showing the common vermiculated pattern of 2cy argenteus. 
The last moulted coverts are the central greater coverts and outer lesser coverts, replaced by mid-August. From mid-August onwards, 2cy argentatus start the partial autumn moult, starting again to drop the upper tertial and inner greater and median coverts. 

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