Albert de Jong
barabensis type adult, June 06 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: Short bill, pale iris. Note broad full sub-terminal band on P10. Mirror on P9 and P10, black down to P4. P1 dropped, PMS = 1. Calls included below picture.