There is an out of focus object that cross the bird's outline, hence will cause an issue during cropping. There is also a green color fringe.
The second bird is not completely in focus. You needed more depth to include its legs. You should always try to include all objects in the forefront in focus.
There third picture is not in full focus. Besides, there seem to be a motion blur. In addition the whites/highlights need to be adjusted down to achieve more details.
For the fifth image, the highlights are too high.
The sixth photo has motion blur
The seventh image also has a focus problem.
Please zoom in on your files to inspect them at between 100 and 200% before submitting them.