Squirrel Love

I watched these two frolic, jumping from branch to branch high up (and down) in another nearby tree (apparently that was fore-play.) Then later I saw them chasing each other around this tree trunk and "wrestling" at its base. At first I thought it was just young squirrels playing or rough-housing but then, on closer inspection, I saw it was not that at all. This was my first time to observe this mating behavior, which went on for over 3 minutes. The act seemed to be consummated on more than one occasion during that time. I also captured it all on video. (Yes, squirrel porn.)  In fact, this photo was taken while I was video taping.