Your results are very good. Thanks for posting. I do have a monopod and have used for sports but not wildlife. I don't own the 300 4.0 so would have to decide between this lens, the nikon AF 100-400 or sigma 150-500. The AFS 100-400 is too rich for my blood right now. I would imagine my best results would be with the 300 prime assuming my shutter speeds > 1/500 sec. I would lose flexability for other purposes. When I am ready to pull the trigger I will strongly consider all 3 lenses. If I come into extra money my choices my change.
"Cameras and lenses are simply tools to place our unique vision on film. Concentrate on equipment and you'll take technically good photographs. Concentrate on seeing the light's magic colors and your images will stir the soul." Jack Dykinga