Herring Gull (argentatus & argenteus)

(last update: February 11, 2013)

Herring Gull adult NLA 5.425.462 (argenteus) September 2011 & April 2016, IJmuiden, the Netherlands.

Ringed as 4+cy bird on July 01 2010 at IJmuiden harbour, The Netherlands. Bird was taken into care for a while and then released with ring. In 2016 it appeared to be territorial in IJmuiden harbour, so probably a local bird.

below: Herring Gull adult NLA 5.425.462 (argenteus), April 06 2016, IJmuiden, the Netherlands. Picture: Mars Muusse.

below: Herring Gull adult NLA 5.425.462 (argenteus), April 01 2016, IJmuiden, the Netherlands. Picture: Mars Muusse.

Thayeri pattern on P9 and P10.

below: Herring Gull adult NLA 5.425.462 (argenteus) September 11 2011, IJmuiden, the Netherlands. Pictures: Maarten van Kleinwee.

Adult Herring Gull moulting to winter (basic) plumage. P6 / P10.