Lesser Black-backed Gull (graellsii & intermedius)

(last update: May 17 2015)

(2 images) LBBG 2cy, August 15 2003, Westkapelle, the Netherlands.

A 2cy LBBG, with an average moult score: P7 is fully grown and no juvenile primaries left. A barred bird. In the wing-coverts, the last phase involves the central greater coverts and lesser coverts in the carpal edge. In the ordinary moult sequence, LBBG finish with about greater coverts #7-8 and the outermost lesser coverts in the upper row. As can be seen in the image, those central greater coverts have been replaced and are fully grown now. However the upper tertial and the second greater covert are still old and abraded second generation feathers, replaced in the post-juvenile moult.