Black-headed Gull Chroicocephalus ridibundus

(last update: 3-04-2011)

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

May 28, 2009, Starrevaart, Leidschendam, The Netherlands (52.10N 04.43E). Photo: Maarten van Kleinwee.

A 1cy Black-headed Gull moulting to juvenile plumage (pre-formative moult). The mantle, scapulars, tertials, lesser- and median coverts are dark, chocalately, brown with a light fringe.
The greater coverts are predominantly gray. The head and throat are patchy brown, while the breast and flanks are buff-coloured.

This individual is begging food off of one of its parents by assuming a hunched (submissive) posture in which the neck is withdrawn and the headed is tilted upwards.