In reply to Fredt:
I'm not sold on the kingfisher. It's just too typical. It's a great shot to be sure but it isn't special apart from being a well executed shot of a good subject.
The other one is a bit flawed but the subject is far more interesting. It is a picture of a bird that is actually going about the business of being a bird, not just sitting and looking pretty. It is gritty and real. It probably wouldn't be a default desktop background on a Windows PC or Mac but that's rather why I like it.
I would love to see a bit more space on the left (and a bit above) of the second image - in the direction the bird is looking. A bit of tactical blurring or vignette to disguise the fact that the grass strands are leaving the frame would help, too, because they currently draw the eye away from the subject. I wouldn't touch the saturation at all but possibly pulling the luminosity of blue down a bit (except around the eye) to darken the background would help. Pushing the brightness of the image up, overall, would also help.