Herring Gull- Zilvermeeuw (argentatus & argenteus)
Herring Gull plumages:
hg sub-ad January
Herring Gull adult 5.335.?52 (argenteus), May 06 2007, IJmuiden, the Netherlands.
A bird with a Dutch ring: Vogeltrekstation Arnhem Holland 5.335.?52. Ring not completely read, probably missing code is '1'. Probably ringed as pullus in June 2000 at IJmuiden, the Netherlands.
In all respects a local bird, but in the field the legs appeared yellowish (leg hue not really captured in the pictures though).
From June to October, a complete moult
will bring 3cy argenteus in so-called "third winter" plumage.
By September, when the complete moult is (almost) finished,
the head will show extensive 'winter streaking', mottled brown contrasting
with the white breast as in an executioner's hood. The scapulars and
mantle are pale adult-like grey, although some individuals may show an
pale brown hue on the lower scapulars.