Black-headed Gull Chroicocephalus ridibundus
(last update:
Moderators:
Tim Audenaert
Maarten van Kleinwee
BHG 1cy May
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BHG 2cy January
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BHG 2cy July
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BHG 2cy November
BHG 2cy December
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Below: First-calendar year Black-headed Gull, July 3, 2010, Grote Dobbe, Zoetermeer, The Netherlands (52.059N, 4.494E). Photo: Maarten van Kleinwee.
First-calendar year Black-headed Gull, moulting to first-winter (formative) plumage. In this post-juvenile moult, all feathers are replaced except those on the wings and in the tail.
In this individual, the body is now almost completely white and the brown markings on the head and hind neck have started to fade. The scapulars and mantle feathers still show predominantly first-generation, juvenile brown feathers.
