The only additional edit on this one is to brighten up the eyes. I must say that on this image it made a huge difference. I am really glad you suggested this!
Glossy Ibis by
Big00Ern, on Flickr
For the American Avocet, I simply used a different picture. I had a bunch to choose from and found this one to be interesting. I also tried to brighten up the eyes a bit, but found that it was really easy to overdo, so I kept it minimal.
American Avocet by
Big00Ern, on Flickr
The procedure I used to brighten up the eyes was to create a neutral grey layer set to overlay mode above the layer with the bird. I then painted white on the grey layer with a brush in the area where I wanted to lighten up the image. I used a soft brush with low opacity and made it big enough as to not have any hard lines. This worked really well for the Glossy Ibis, but seemed to obvious for the other two images. I'm not really sure why.