If you feed them, they will come
I've copied my title directly from SecondSeason's blip today.
Her picture involved a feeder and a delicate humming bird, but the same title applies to these rather more robust gulls.
The field has been harrowed and manured in the last few hours and there are hundreds of gulls wandering about eating something, it could be worms or it could be manure.
When I stopped the e-bike to take this photo all the gulls in my corner of the field starting walking away. It looked rather humourous as they all turned their backs on me and walked off!