Herring Gull- Zilvermeeuw (argentatus & argenteus)
Herring Gull plumages:
hg sub-ad January
(2 images) Herring Gull 3cy H-127087, November 15 2003, Westkapelle, the Netherlands (51.33N 03.25E).
A bird with a Belgian ring: Bruxelles Belgium H-127087. Ringed as 2cy female on September 18 2002 at Oostende beach, Belgium (51.14N 02.53E). Not ringed as pullus, so not necessarily of local argenteus population, although general plumage development exact in line with average November 3cy argenteus, rather than argentatus. Primaries, secondaries and rectrices fully grown. Most of the greater and lesser coverts show an obvious brown hue and are worn at the fringes; the median coverts look fresher and are replaced again in the partial moult this autumn. They appear grey now.
From June to October, a complete moult
will bring 3cy argenteus in so-called "third winter" plumage.
By October, when the complete moult is 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.