Peter Adriaens (Belgium)
Ies Meulmeester (Netherlands)
Larus cachinnans 437P May 06 2013, Gatovo - Minsk, Belarus. Picture: Dmitry Goncharov.
Green ring 437P was recorded at Gatovo colony. Ringed in Poland, probably in the series of metal PLG DN-25xxx used at Zwirownia Zakole, Poland (50°02'N, 19°28'E). Zakole = gravel pit, Zwirownia is along the river Oder. Probably ringed as pullus on May 22 2008, but ring data still pending.
Jizz suggests female.
Below: roof top nesting in Belarus.
This is what local ornithologist Dmitry says:
Last update: 2013 count is 2160 pairs!