This, I think, is a Reed Warbler. It is the first warbler of any kind that I've ever photographed and, I think, the only one I've ever seen. I admit that this is a snapshot, I didn't have much time for planning as this guy/gal was waiting for me, but didn't stick around long.
Changes: I cropped it, tweaked the sharpening on the bird and added a little Gaussian blur on the left where the reeds are. I also adjusted the contrast (black and white control points set in NX2) and ran a spot of noise reduction and edge artefact correction over it. Still the bird's beak looks a little bluey to me. I could correct that a little more I guess. Other than that, this is pretty much what fell out of the camera. Improvement suggestions please.