Lesser Black-backed Gull (graellsii & intermedius)

(last update: May 17 2015)

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LBBG rings

lbbg 1cy May
lbbg 1cy June
lbbg 1cy July
lbbg 1cy August
lbbg 1cy September
lbbg 1cy October
lbbg 1cy Nov - Dec

lbbg 2cy Jan-Febr
lbbg 2cy Mar-April
lbbg 2cy May
lbbg 2cy June
lbbg 2cy July
lbbg 2cy August
lbbg 2cy September
lbbg 2cy October
lbbg 2cy Nov - Dec

lbbg 3cy Jan-April
lbbg 3cy May
lbbg 3cy June
lbbg 3cy July
lbbg 3cy August
lbbg 3cy September
lbbg 3cy October
lbbg 3cy Nov - Dec

lbbg sub-ad Jan-April
lbbg sub-ad May
lbbg sub-ad June
lbbg sub-ad July
lbbg sub-ad Aug
lbbg sub-ad Sept
lbbg sub-ad Oct
lbbg sub-ad Nov - Dec

lbbg adult January
lbbg adult February
lbbg adult March
lbbg adult April
lbbg adult May
lbbg adult June
lbbg adult July
lbbg adult August
lbbg adult September
lbbg adult October
lbbg adult Nov - Dec

(2 images) LBBG 2cy, October 05 2002, Boulogne-sur-Mer, NW France. 

Primary p9 and P10 are still juvenile and the tips are very abraded. Primary P8 is at the same length as P7 and still has to grow an inch or so. Primary moult will probably suspended during migration.

In the rectrices, R3 and R4 show a white fringe and therefore are very fresh second generation-like feathers. The other tail-feathers are worn second generation feathers. The secondary moult is highly delayed with only S1-S2 replaced for second generation feathers, S3-S4 missing and all other secondaries still old abraded juvenile flight-feathers. The rather 'jumpy' moult sequence in the wing-coverts is obvious with the bleached pale brown coverts and recently moulted dark coverts side-by-side.