(2 images) Larus fuscus fuscus 2cy, August 04 2002, Stockholm, Sweden.
Probably a 2cy bird showing very advanced tail-feather replacement, showing a pattern commonly found in 3cy birds. The tail-feathers left and right are not exactly the same, but in both sides there appear to be a few all-white feathers. At the wintering grounds, all primaries were replaced for new second generation primaries and all 10 primaries are still present. The wing-coverts, scapulars and tertials are a mix of second and third generation feathers. Remarkable, the legs are slightly pale yellow and the basal half of the bill is lemon yellow, with a red spot on the lower mandible, obscured by the large black bill-band.
Tertials #3 - #4 are much fresher that #1 - #2 and #5 - #6 and were replaced very recently, probably after arrival in Scandinavia.
The greater coverts have much abrasion at the tips and along the fringes, although the inner four greater coverts look darker brown and slightly fresher. In the median coverts, #3 - #4 are of the same condition as the central greater coverts, but the innermost and outer medians are much fresher. A few lower lesser coverts have been replaced recently as well, a moult sequence much in line with the partial autumn moult of 2cy graellsii / intermedius, be it three months earlier, in July. The lesser coverts look very abraded again, as the central greater coverts.
In the scapulars, about 75% has been moulted to third generation all dark fresh scapulars.