I cropped the photo to look at an enlargement of each hawk. I particularly liked the shot of the hawk on the left. With some adjustments in Paint Shop Pro (noted under each photo) and some excellent coaching from OP, I was able to bring out quite a bit of detail. The grey mottling is out-of-focus branches in the foreground.
Paint Shop Pro: Histogram gamma adjustment, Brightness -15, Contrast +10, High Pass Sharpen
I repeated the process with a photo of the other hawk soaring in the clear blue sky:
Paint Shop Pro: High Pass Sharpen only
I had never spent any time observing birds nor had I ever photographed birds before I started this blog. Most of the birds I currently photograph are in my own backyard or close by. I'm so grateful for the technology that allows me to have a permanent record of these backyard visitors. I continue to work on mastering that technology.