Herring Gull 2cy (argentatus), January 29 2006 , IJmuiden, the Netherlands. Picture Robert Heemskerk.

In this individual, all the scapulars are still juvenile. The wing-coverts are very neat coverts, without extensive abrasion; even the innermost coverts and tertials (often a vulnerable feather tract) are pretty neat.
Argentatus is a breeding species of northern latitudes in Scandinavia, and as can be expected, the moult to second generation feathers is delayed, compared to south-western breeding argenteus. Argentatus from the northernmost populations remain in Scandinavia for most of the autumn, and this factor, together with the later hatching date, may be one of the reasons the juvenile feathers are not as bleached as in argenteus by January.