Suzanne - This is about as razor sharp as you can get on a bird in flight, just perfect. The landing pose is awesome and the light was right on it. Sweet image.
Since you haven't done a lot of canvas expansion, based on your comments, I thought I would do a very quick version to see what you think.
Not necessarily better than the original, but your bird has a very strong vertical component to it, so thought it was worth a try.
Basic technique:
Expand canvas with crop tool.
Rectangular marquee tool to outline the area that I wanted to stretch out to fill the new blank canvas
Stretched it to fill
Minor cloning and clean up to remove obvious signs of stretching.
There are other ways, more elegant ways as well, but this allows a quick look at what expanded canvas would do to the composition.
Thank you Randy, you are quite correct I have not attempted that before .Thanks for the info the image did suggest a vertical to me but when I tried to crop as mentioned above it was to tight
suzanne