Wonderful photo. Great detail. Rich colors.
One suggestion would be to give the bird more space. To show you what I mean I reworked your image using Content-aware Scale in Photoshop CC.
I think that if the bird's head were turned just slightly toward the viewer it would be more effective.
Before I saw Henry's repost I thought it needed more space all around.
Good detail and very sharp.
I was looking at your techs and I would have been at ISO 800 to increase my DOF to F11. When you do closeups like this the more DOF the crisper the image.
Great light and clean BG,
gail
Hmm, I cannot see the OP, but from the repost I like the sweet light, BG, details. I wish for a slightly better head angle, and pointing your lens down a tad would have been an option comp-wise to get the subject higher and more of that perch in.