Looks like this one has found a mate and a den. This broken limb hole is approximately 20' off the ground and the tree is about 100 yards from our open porch.
Believe this is the same Fox Squirrel I've photographed last Fall.
Leica D-Lux 4 - APO Televid 82mm Scope,DC Vario-Summicron 1:2.0-2.8/5.1-12.8 ASPH 1/400s f/5.6 at 6.8mm iso200; DigiScope Image
UnCropped but with Size Reduced for Internet Viewing
full exif