Thanks for the comments. If I'd had any control over the snake's position, my angle for the shot, or the lighting, I might have changed some or all of them. But the zoo frowns on people breaking the glass and climbing in to rearrange or re-light a snake big enough to eat a small gazelle. :)
I bet it is a beautiful snake but I wish I could see more of the head. I think it would be better if I could see the natural color of the snake and not be distracted by the color of the lights on its body.
Beautiful and it's great that it takes a minute to realize where the head is. The light and shadows are great but the foreground out of focus takes away from the overall power of the shot for me.