I am a firm believer of post-editing; I use Adobe Lightroom for all my post-process work. I have met many photographers, amateurs and veterans alike, who have lectured me on the unnatural-ness of post-editing, as if it is a lesser art than untouched, "pure" photos. There is certainly value in having elements of photography (composition, exposure, sharpness, etc.) done right while shooting. That said, there will be times when errors are made and post-editing, however extensive, is required. In this particular photo, there were a couple of smaller rocks on the far left side of the image. I used Lightroom's spot removal tool to cover these rocks by sampling a different area of the image and overlaying it where the smalls rocks were located. Like breaking the Rules of Third, the removal of these small rocks from the scenes contributes to the symmetrical composition and intended mood of the image.
From this shot, I learned 5 things: Carolina Chickadee
Wildlife photography takes a lot of patience. It requires sitting for hours at a time waiting for the bird or deer you've been waiting to photograph to show up. Add to this various factors like the weather, time of day, season of the year, and it can drive any impatient person insane. Sometimes you go home with tons of amazing shots, sometimes you go home with nothing.