nominate Lesser Black-backed Gull (L. fuscus)

(last update: 9-11-2009)

Amir Ben Dov (Israel)
Hannu Koskinen (Finland)
Mars Muusse (the Netherlands)

fuscus rings

fuscus 1cy July
fuscus 1cy Aug
fuscus 1cy Sept
fuscus 1cy Oct
fuscus 1cy Nov
fuscus 1cy Dec

fuscus 2cy Jan
fuscus 2cy Feb
fuscus 2cy March
fuscus 2cy April
fuscus 2cy May
fuscus 2cy June
fuscus 2cy July
fuscus 2cy Aug
fuscus 2cy Sept
fuscus 2cy Oct
fuscus 2cy Nov

fuscus 2cy Dec

fuscus 3cy Jan
fuscus 3cy Feb
fuscus 3cy March
fuscus 3cy April
fuscus 3cy May
fuscus 3cy June
fuscus 3cy July
fuscus 3cy August

fuscus 3cy Sept

fuscus 3cy October
fuscus 3cy Nov
fuscus 3cy Dec

fuscus 4cy Jan
fuscus 4cy Feb
fuscus 4cy March
fuscus 4cy April
fuscus 4cy May
fuscus 4cy June
fuscus 4cy July
fuscus 4cy Aug
fuscus 4cy Sept

fuscus 4cy Oct
fuscus 4cy Nov
fuscus 4cy Dec

fuscus ad Jan
fuscus ad Feb
fuscus ad March
fuscus ad April
fuscus ad May
fuscus ad June
fuscus ad July
fuscus ad Aug
fuscus unringed Aug
fuscus ad Sept
fuscus ad Oct
fuscus ad Nov
fuscus ad Dec

Larus fuscus fuscus 2cy, August 03 2002, Stockholm, Sweden.

A second calendar year fuscus with new central median and lower lesser coverts. The outer primaries were all included in the post-juvenile primary moult, so this bird returned in Stockholm with 10 second generation primaries (with rounded tips). 
Tertials #1-6 have all been replaced for second generation feathers. 
Greater covert #1 is missing, #2-7 were included in the moult last winter and #8-14 (last visible) are fresher, moulted more recently. In the median coverts, #1-4 were included in the winter-moult, #5-8 are much fresher and darker grey, lacking the brown tone of the other coverts, #9 is old and was replaced earlier, #10 is fresher again, lacking abrasion, #11 was moulted on the wintering grounds, #12 (last visible) is fresher. In the lower lesser coverts, #1-2 are old (second generation feathers replaced on the wintering grounds), #3-5 are fresher, #6 is probably missing, #7 is old, #8 is fresher, #9 is old, #10-12 (last visible) are fresher. In the lesser coverts, about 50% (25 feathers) is still old and abraded, replaced on the wintering grounds, while 10% is missing and the others are fresher, darker grey. 
The exact age of the scapulars is very hard to ascertain, but three lower upper scapulars are missing. The lower scapulars are fresher, as is the case with several upper scapulars. They are probably third generation feathers, still resembling second generation scapulars in their patterning (an accentuated dark broad central wedge and paler grey towards the fringes). 
The recently replaced central median and lower lesser coverts might be third generation as well. The central median and central lower lesser coverts are 'favorite' places to replace feathers in an early stage (post-juvenile moult in September-October) in West-European graellsii and michahellis, and are probably feathers most urgently needed to replace again in the complete moult.