A column in the Canton, Illinois Daily Ledger illustrates how smart squirrels are. My guess is the writer encountered a red squirrel, a species that is notoriously entertaining AND territorial, aggressive and noisy. Not to mention totally cute.
“I came upon this squirrel sitting low in a tree branch…. I guess he was too busy eating at the time. Needless to say, I scared the squirrel to death. It went higher in the tree and then proceeded to “scold” me….Well, I tired of its game and moved on. The squirrel, however, had other plans and decided to follow me, barking the whole time. … I then stood and looked at the forest around me. It was about that time that a walnut, still in its casing, crashed to the ground right beside me. The collision with the earth felt as though a small tremor had just moved through. Just another foot and this thing might have knocked me cold.”