Lesser Black-backed Gull (graellsii & intermedius)

(last update: 22-2-2011)


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 3cy 4238977 October 11 2003 Westkapelle, the Netherlands.

Ringed in N Germany, island Helgoland: a 3cy LBBG 'Dutch intergrade' / intermedius metal ringed right Helgoland 4238977. This population can be placed between 'Dutch intergrade' and intermedius, or one may assume them to belong to either one of both taxa.

P8 is fully grown and P9 is at the length of P6. The rectrices have been replaced for largely white new feathers. The outer secondaries are typical third generation: in general adult-like but with obvious dark, blackish centres, visible in the bottom image. The bill is pale-yellow, with the red gonydeal spot almost completely obscured by the broad black bill-band. The iris is white-yellow, without obvious speckling. The orbital ring is very dark red.
Note the black centre on the central tertial (tt3-6) in the top image.