I noticed that you have an fz5 which, if I'm not mistaken is a 5Mp camera. The posted image is only 800x600 so I assume you reduced the image size to fit it on the web.
Sometimes you can achieve a more impressive web result if you do a full size crop...that is..cut out an 800x600 pixel block from the center of your original and post that. You could have the entire bird on the screen and it would appear as though you were much closer.
This is a full sized crop from a shot that is (as you might imagine) mostly concrete except for the sparrow in the center. The full size crop makes it look as though the little bird is filling the screen.