I like the bird, looking so concentrated on something we can not see and have to think about it...
May be not many people here will like it, because it has not the perfect head angle... :)
Mark III Canon 500 + 1.7 TC
1/640 sec / f 5.6 / ISO 1000
- 2/3 Exp Corr.
You are correct on the head-angle but everything else is well executed. I like that he is leaning forward. I might suggest that a reverse s-curve can be used to lower the contrast on the perch. Go to http://www.birdphotographers.net/for...ad.php?t=20434 for info.