Black-headed Gull Chroicocephalus ridibundus
(last update:
Moderators:
Tim Audenaert
Maarten van Kleinwee
BHG 1cy May
BHG 1cy June
BHG 1cy July
BHG 1cy August
BHG 1cy September
BHG 1cy October
BHG 1cy November
BHG 1cy December
BHG 2cy January
BHG 2cy Febuary
BHG 2cy March
BHG 2cy April
BHG 2cy May
BHG 2cy June
BHG 2cy July
BHG 2cy August
BHG 2cy September
BHG 2cy October
BHG 2cy November
BHG 2cy December
BHG adult January
BHG adult Febuary
BHG adult March
BHG adult April
BHG adult May
BHG adult June
BHG adult July
BHG adult August
BHG adult September
BHG adult October
BHG adult November
BHG adult December
Below: First-calendar year Black-headed Gull Lithuania HA10419, July 23, 2009, Grote Dobbe, Zoetermeer, The Netherlands (52.07N 04.53E) 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 has turned completely white and the brown markings on the head and hind neck have started to fade. Most of the scapulars and mantle feathers have been replaced by gray, second-generation feathers. (Ringing date: June 13, 2009, Striunos Tvenkinys, Kaunas, Lithuania. Age: 1st-calendar year.)
