Amongst the flock of black-headed gulls, which included several of "our" birds, was this colour-ringed 2nd-winter Mediterranean gull, PNU0.
|Photo by Keith Stevens|
Keith reported the ring and heard back that this bird had been ringed as a chick on 27 May 2012 at Wojcice in Poland by Jakub Szymczak. This is a movement of 1648km, and whilst it isn't a black-headed gull, it is yet another example of a gull, born in Poland, moving to winter in Northern Ireland.
Many thanks to Keith for passing on the photo and information.