This bird is interesting - it has bright bare parts (note especially the red of gonys extending onto the upper mandible) and a rather well streaked head. Some may argue that these features make this bird not safely identifiable as cachinnans.
Tuesday, 14 December 2010
Adult Caspian Gulls, Lithuania (September 2010).
This post shows a selection of Caspian Gulls from Preila Pier on the Neringa Spit, Lithuania. Photos were all taken in mid September. The ringed Ukrainian bird above is an annual visitor to the pier. The birds below illustrate the differences between the sexes, as well as some interesting less typical features.