Black-headed Gull Chroicocephalus ridibundus

(last update: 14-03-2011)

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: Adult Black-headed Gulls, January 22, 2011, Zijlpoort, Leiden, The Netherlands (52.161N, 4.504E). Photo: Maarten van Kleinwee

At this time of year, a handful of adult Black-headed Gulls can be seen with an extensive head moult to summer (alternate) plumage. Only a small minority of adult Black-headed Gulls start their moult early. This individual has probably started its moult in October/November, and will have completed it by February, when the majority of adult Black-headed Gulls will just have started their moult.