Lesser Black-backed Gull (graellsii & intermedius)

(last update: May 17 2015)


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

(3 images) LBBG 1cy NLA 5.xxx.166September 17 2004 Westkapelle, the Netherlands. Pictures Pim Wolf.

A first calendar year bird with a Dutch ring, a 'Dutch intergrade' LBBG. A very advanced individual with a 'random' moult sequence. Most upper scapulars (75-99%) have been replaced for second generation feathers, and about half of the lower scapulars are new (50-75%). In the wing, many feathers have been replaced as well: tertial 1 and 2 are new, greater covert 2, median coverts 1,2 4, 8, 9, 11, 14, lower lesser covert 5, 6, 9, 10, 11 and 13 are replaced. Research by ORG (Gull Research Organization Netherlands) in breeding colonies near Rotterdam showed that juvenile LBBG may already moult to second generation wing-coverts when birds are still not fledged and attend the parents.