You will see plenty of this pose around my neighborhood at this time of year. Squirrel eating fresh walnut! Apparently, there is a walnut tree somewhere in the area, and the squirrels are eating their fill for the winter.
They also love to dig up the yard and bury the nuts, or hide the nuts for later. The only problem I had with this rodent is when they are chopping the outer skin off the walnut on my driveway, it leaves an ugly stain on the concrete.