Lesser Black-backed Gull (graellsii & intermedius)

(last update: May 17 2015)

LBBG 3cy BTO GA40646May 26 2006, Amsterdam, the Netherlands. 

Ringed in the U.K.: BTO GA... Average moult pattern typical for western taxon graellsii: grey saddle (scapulars and back) contrast with the brown worn wing-coverts. Single coverts have been replaced for adult-like grey feathers (inner median coverts and several lower lesser coverts). Primaries and secondaries still old, second generation. Several tail-feathers replaced for white feathers, normally supposed 3rd generation.