Albert de Jong
barabensis type adult, June 04 2007, Sverdlovsk oblast - SE Urals. Picture: Annika Forsten & Antero Lindholm.
Picture from Tseljabinsk. Annika Forsten & Antero Lindholm took pictures of large gulls during breeding season in Pervouralsk and Ekateringburg, Sverdlovsk oblast, and northern part of Chelyabinsk oblast. All photos are from early June. Most of them looked like barabensis. See their website for more info.
Bird below: mirror on P10, broad subterminal band on P10, subterminal black on P4 confined to spot on outerweb, P1 dropped. PMS = 1.