It's the bite and release that confuses me. I've been taught that a bite and release is a defensive move. Bite and wrap is a food bite. His behavior prior to the bite wasn't defensive at all. He was coming toward me. Enough so, that I decided to back off and properly introduce myself. It was only when I thought it was clear to him that I wasn't food that I decided to reenter his enclosure. My mistake may have been leaving to fill the water bowl after I had introduced myself. When I returned with the water bowl, maybe, he thought I was something new. But if it was a food bite, why release? Seems counterintuitive.