Lesser Black-backed Gull (graellsii & intermedius)

(last update: 4-1-2011)


LBBG rings

lbbg 1cy May
lbbg 1cy June
lbbg 1cy July
lbbg 1cy August
lbbg 1cy September
lbbg 1cy October
lbbg 1cy November
lbbg 1cy December

lbbg 2cy January
lbbg 2cy February
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
lbbg sub-ad 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

LBBG graellsii 2cy H713 April 16 2009, Quarteira, Portugal. Picture: Michael Davis.

Ring series used at Amrum & Helgoland Islands, N Germany; two colonies in the transition zone between continental graellsii ("Dutch intergrade") and Scandinavian intermedius. Project run by Sönke Martens.

Mid April, P1 has just been dropped, but the moult in wing-coverts and tertials is exceptional. This bird nicely demonstrates the overlap from post-juvenile moult (which may include many of the wing-coverts and tertilas, just as it is in michahellis) into the complete moult (which starts in spring, with P1 shed).
Here, no juvenile wing-coverts visible anymore, and a gap in the central gc, which is normally associated with the last stage of wing-covert moult in the complete moult. The rectrices are 2nd gen as well most probably, with broad white tips.