One thing I quickly learnt is that the birds are very much frightened by a camera close to the restaurant table. They just would not sit down and feed, instead they dive-bombed the dining room with all kinds of acrobatic moves. The solution was to zoom in a bit and position the camera further away. But even with that problem solved, it is very hard to actually get the birds in the frame. And preferably sharp, that is.
This shot of a flying-by Nuthatch is nothing like the results I have in mind, but I do like it. The position in the frame is fine, the darkish but not blacked-out background gives a hint of dusk and the bird is actually sharp. What could be better: the bird faces away from the camera and the wings would look better fully extended.