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
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BHG adult October
BHG adult November
BHG adult December
Below: Black-headed Gull, >4th calendar year, 5.1, November 19, 2011, Oosterpark, Amsterdam, the Netherlands (52.21N, 4.55E). Photo: Maarten van Kleinwee.
Ringed as after 2nd-calendar year, Oosterpark, Amsterdam, (52.21N, 4.55E), December 2009.
In full basic (non-breeding) plumage, with a small ear spot and faint head bands.
Below: Black-headed Gull, >4th calendar year, 5.1, March 11, 2011, Oosterpark, Amsterdam, the Netherlands (52.21N, 4.55E). Photo: Maarten van Kleinwee.
Ringed as after 2nd-calendar year, Oosterpark, Amsterdam, (52.21N, 4.55E), December 2009.
In pre-alternate moult, moulting to alternate (breeding) plumage. The brown hood is about 99% complete.
Below: Black-headed Gull, >6th calendar year, 5.1, April 2, 2013, Oosterpark, Amsterdam, the Netherlands (52.21N, 4.55E). Photo: Anders Svensson.
Ringed as after 2nd-calendar year, Oosterpark, Amsterdam, (52.21N, 4.55E), December 2009.
In full alternate (breeding) plumage.
