Great focus and composition. It appears a little dark. A dodge-and-burn layer to lighten the area around the squirrel may help. I love the light in his eyes!
The color, clarity, and contrast of the squirrel and leaves-dirt-branches is wonderful! I hope this image gets the credit it deserves. The only negative I can see is a minor bit of noise in the background leaves (from zoom length perhaps?). Great job! 10