Black-headed Gull Chroicocephalus ridibundus |
Juvenile/first-winter, July 2008
Juvenile/first-winter, July 2022
First calendar-year (1W), December 2004
Second calendar-year (1W) in flight, January 2005
Second calendar-year (1W), January 2005
Second calendar-year (1S) in flight, May 2005
Second calendar-year (1S), June 2006
Second calendar-year (1S), commencing primary moult, June 2022
Adult, winter plumage, December 2004
Adult, winter plumage, January 2005
Adult, breeding plumage, April 2019
Adults, breeding plumage, June 2003
Leucistic adult, September 2003
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