LBBG E757 7cy, June 17 2001, Missouriweg - Maasvlakte, the Netherlands.

E757, born and ringed at the Maasvlakte July 09 1995, now in it's 7^th calendar year.
Its moulting it's head, as in common in most LBBG adults by June in the Netherlands. Within a few days, the feathers around the eye are shed, creating a naked circle around the eye. On average, this is the stage of wear as can be found in most adult LBBGs now.
Note the iris: not as intense yellow as suspected in 7cy, rather pale with a hint of blue. Iris colour may be related to seasonal changes?