A couple of points - I, for one, would appreciate it if you would number your images when you post them. This makes it a lost easier for reviewers to refer to a specific image without having to flip back and forth to check. More folks would probably comment on specific images if there was an easy way to refer to any particular one. The other one is that in most cases when photographing wildlife, particularly birds, having an eye visible and in focus is a must for a good photo, at least that is what the pros tell me. You have managed to do this quite well in most of your images and where you have not been able to do this - a dark eye surrounded by dark feathers is very tricky, but you can lighten the area around the eye so that the eye is visible.
LilyBee mentions the "rule of three", when I suspect she means the rule of thirds (rule of three is something else). Basically this rule/guideline has to do with dividing your image up into thirds both vertically and horizontally and placing an important component of the image at one of these points. You can have a look at this one:
Guidelines for Better Photographic Composition Rule of Thirds , or you can also search the web using "rule of thirds" as your search criteria and you will find enough stuff to keep you reading for weeks

. This guideline helps you place your images in the frame and is one of the primary "rules of composition". Like all "rules", it can be broken, but I still find it very helpful as a compositional technique.
My only comment is that you have done a great job of getting the subjects very sharp, but, for me, there are too many to comment on any one in particular with a reference scheme. HTH.
WesternGuy