Squirrels mainly. I once went to a park to play tennis with a friend. We weren't keeping score and at one point I asked him, "who's winning?" He told he didn't know cause we weren't keeping score. I said, "geez, I wish someone could tell me who's winning." Just then, a tiny little squirrel walked out from under the leaves, it was in the fall, and walked up to me. He circled around me a few times and then winked at me before he ran back into the leaves. I turned to my friend and said "I'm winning 2 sets to 1."