
However, if you look at the same area cropped from the full size image, you can clearly see it is a bird.

In this case, what should I do when the bird or other object is re-sized with the rest of the image, and becomes merely a speck and seems like dirt? I know cloning it out and other such manipulation is generally frowned upon, but in this case would it be worth it to make an exception so as to avoid rejection for dirt that really isn't dirt? Please let me know so I can avoid this in the future...
All of that having been said, I do agree for the other rejection reason (blurry), and I am not at all complaining about the rejection. In fact, I really, really appreciate the fact that the screener took the time to include a personal note detailing the reason for rejection. Thank you for your advice for next time and what to do about this problem!