These are beautiful Neil!
Since you posted in the critique section I will offer up several very small ones...
First photo - there is a speck of dust under the branch.
Third photo - I can see a halo around the branch in the background.
Third photo - This is more subjective. I would be tempted to de-saturate or de-illuminate the red out of focus blob at the top of the photo. While the red color complements the overall color scheme well, it keeps drawing my eye away form the bird.
Stunning photos!
