As I wandered around the arboretum, I kept seeing these small strips of bark scattered all over the ground. I could see where it had been stripped off newer, green limbs of the big leaf maple. Eventually I caught up with one of our resident gray squirrels busily peeling off small lengths. He quickly worked his way down one, discarded it and promptly cut off another one. I investigated one of the pieces and could see the small teeth marks on the inside. I could hear his teeth scraping off the inner bark and I was amazed at how precisely and swiftly he could shave off the thin inner bark and eat it.