Hi Arsdel, this is a great looking bird. It seems the focus point was on the chest, and not on the head. The image would have benefitted from a greater depth of field, as the feet are only marginally sharp.
The head angle is not ideal, and beware of the lack of detail in the whites (recovered overexposure?). I might have placed the bird higher in the frame, and given it more space, especially on the left side of the picture.
Critical focus is indeed on the back - perhaps the bird turned its previously in-focus head at the last moment giving it both some softness due to motion and having gone out of DOF range. Neat colours to the BG.