Lesser Black-backed Gull (graellsii & intermedius)

(last update: 16-2-2011)

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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

L. f. graellsii JG April 2008 - March 2009, Landfill VRSU de Pinto, Madrid, Spain. Picture: Delfín González.

Ringed graellsii, ringed in the Netherlands by Roland-Jan Buijs in SW Netherlands, summer 2007 at Moerdijk.

below: JG 2cy April 06 2008, Landfill VRSU de Pinto, Madrid, Spain. Picture: Delfín González.

Most scapulars replaced, wing-coverts and tertials still juvenile.

US: 100%; LS: 75-99%; TOT SCAPS: 75-99%.

Present wing-coverts and tertials still juvenile. Few inner mc seem to be missing, maybe the complete moult has just started, in the most common sequence in the wing-coverts: inner mc have been shed. Probably, the upper tertials and inner gc will soon follow. This all moult simultaneous with the inner primaries.

below: 2cy JG April 13 2008, Madrid, Spain. Picture: Delfín González.

below: 2cy JG August 20 2008, Madrid, Spain. Picture: Gabriel Martín.

Late August, the complete moult is nearly ended, with P9 alreday fully grown. The gap in the central greater wing-coverts has closed; time for the partial autumn moult which normally includes upper tertials, inner gc and many mc and llc. At this moment: the median coverts have been dropped again, for the second time this year, and new 3rd gen feather will appear (which may well look either 2nd gen-like, or more adult-like plain grey; especially the last replaced feathers in the partial autumn moult, by early October).

below: JG 2cy December 21 2008, Landfill VRSU de Pinto, Madrid, Spain. Picture: Delfín González.

2cy by December, typical 'second winter plumage' for graellsii with scapulars almost complete 'grey saddle'; and mostly 2nd-gen like wing-coverts.

below: JG 3cy March 29 2009, Landfill VRSU de Pinto, Madrid, Spain. Picture: Delfín González.

Few months later: immature patterned scapulars now all replaced. No changes in wing-coverts or tertials. Not much of a difference compared to the previous image, except bare part coloration.