Keywords: Black-headed gull winter head.jpg Head of Black-headed gull in winter at Verulamium Park St Albans UK own Transferred from http //en wikipedia org en wikipedia; transferred to Commons by User Richard001 using http //tools wikimedia de/~magnus/commonshelper php CommonsHelper 2003-11-01 Gary Houston Black-headed-gull-Verulamium-Park-20031101-001 jpg cc-zero original upload log page en wikipedia Black-headed_gull_winter_head jpg 2003-11-01 14 55 Ghouston 369×192× 8355 bytes <nowiki></nowiki> Chroicocephalus ridibundus heads adult in winter plumage Birds of Hertfordshire Verulamium Park |