Hi Phil, I like the the placement of the bird in frame and how the branch emerges from the corner. In addition to Axel's comment it appears to have a blue cast on my monitor. I used the average blur layer to adjust. As always it is up to you to decide if this helps or not as you were there and I wasn't. Thanks for sharing.
I also like pose and composition of the image. Phil Ertel's color correction are spot on.
Maybe it's just me, but I would clone out the white patch around the head since it seems a bit distracting.
Where did you shoot the Kestrel, btw? Arastradero?
Great posture and sharpness, I think the repost is a tad better as far as colour balance is concerned. This bird is a virtual clone of our Black-shouldered Kite, the Elanus kites are such photogenic birds!
Nice relaxed pose. Agree with Phil on the cast but would be tempted to partially mask the correction from the BG to keep some of the blue from the original. There does seem to be a loss of detail and some sharpening artifacts on the branch - was this a significant crop?