Herring Gull- Zilvermeeuw (argentatus & argenteus)
Herring Gull plumages:
hg sub-ad January
(2 images) Herring Gull 3cy H-107901 (argenteus), October 18 2002, Westkapelle, the Netherlands (51.33N-03.25E).
A bird with a Belgian ring: Bruxelles Belgium H-107901, ringed as pullus on July 06 2000 at Zeebrugge (51.20N 03.11E). Primaries P1-P8 are fully grown. Most of the wing-coverts show an obvious brown hue and are worn at the fringes.
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.
(image above) H-107901 (argenteus), October 18 2002, Westkapelle, the Netherlands (51.33N-03.25E).
(image below) H-107901 (argenteus), November 16 2002, Westkapelle, the Netherlands (51.33N-03.25E).
Another image of H-107901, one month later. Still extensive patterning on tertials and wing-coverts. The small tips on the outer primaries, black in the tail, diffuse brown hue on upper-parts and the typical immature coloration of the bill point to 3cy.