So I found these two threads on head bobbing: http://www.tortoiseforum.org/threads/tortoise-shakes-head-at-other-russian.61514/ and http://www.tortoiseforum.org/threads/head-bobbing-straw-or-hay-multiple-russians.63887/ which are helpful, but I was wondering why my male Russian would bob his head at my hand in his enclosure when he has known me for nearly 5 years? I try to give him his space, but sometimes he just looks like he thinks I'm tasty. He'll even chase my finger over his food...