Having visited the adjacent French coast last weekend, I was very interested to see Herring Gulls commonly nesting on the rooftops of buildings in Granville Town. It is unusual (and perhaps unexpected) that this "urban" habit has not really caught on yet (!) in Guernsey. However, I do wonder whether Herring Gull White 1.AN4 (which was ringed at Chouet Landfill in June 2010) is nesting in the town of Cherbourg. Sophie Rivrins sent me this rather nice photo of the gull standing on her balcony in Cherbourg on 28 April 2012.
Herring Gull White 1.AN4 Cherbourg, France 28 April 2012 - Sophie Rivrins