This Herring Gull carries a G[=] ring. It must have lost is 2nd ring. Probably this Herring Gull was marked as Y[1]/G[=]. If so, it was ringed on July 13, 1988 on Texel as a juvenile. It spent many winters in Katwijk. I saw it again in Katwijk on January 6, 2012, and November 2014. Also I saw it in Katwijk on February 24, 2017 in its 30th calendar year.