Hi Warren, and welcome to BPN! This is a lovely bird in a natural setting, and it looks like your equipment is working well for you. We all strive to get a bird without branches in front of it, but it's not always easy to do. I think it might do with a little boost in exposure, though that might brighten the sky too much. The adjustment could be just masked to the bird. I'd give it a try but I can't figure out how to grab the image from Flickr.
It's possible to post a full-sized image directly from Flickr -- see the post in the Educational Resources forum: Posting Images from Online Sources. Somebody else had a problem with Flickr recently and I'd forgotten that I posted this.
It's especially helpful here in ETL to give some information about your processing and skill level.
I'd love to chat with you about astrophotography, which is a recent interest of mine. Email me if you're interested:
dianemiller@hughes.net. Some of us push the envelope and post the occasional AP image in Landscape.