Wandering Caspian Gulls

We don't have many recoveries of Caspian Gulls and the ones we do get are colour-ring sightings of foreign-ringed birds: most are from Poland (62), with smaller numbers from Ukraine (8) and singles from Germany and Switzerland. But we have only recently started seeing reports from abroad of British-ringed Caspian Gulls and these have all involved birds ringed by the North Thames Gull Group at