Messing about in boats

Sharp's Green Bay again. Lots of birds and I was lucky enough to see a mini-murmuration and swifts darting across the surface of the water taking flies. I even saw a Mediterranean gull. Now these aren't as rare as the Bonaparte's I mentioned yesterday but still not common. Of course you'll be wondering how I made the identification - it was in with some black-headed gulls which I took a photo of and I've just spotted it as I went through today's shots. Purely by chance the guy in this shot came and said hello as he was parked next to me. He asked about the camera and was impressed with the lens - I told him to look for the ones with a grey body rather than a black body.