Herring Gull 2cy (argentatus), July 14 2003, Tampere, Finland (61.31N, 23.43E).

A 2cy argentatus. Very delayed in wing-covert and primary moult. P7-P10 are still juvenile. Most of the wing-coverts are still juvenile, except the outer median coverts, the innermost greater coverts, innermost lower lesser coverts and upper tertials. 

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: