Really cool composition. Looks like maybe a boost of the blacks could help a bit since the bird looks a little washed out & gray-ish. There is also a slight halo that may be from using bi cuibic sharper during the resize or from sharpening "outside the lines."
I really like your compo whit the double post, maybe a little bit off the left.
In this case, with the blue sky, you could have gone inside the lines to sharpen, avoiding the slight halo.