Thanks for the information, Dan. I wish I had asked the folks at the exhibit where they had collected that animal.

This picture represent the closest I could get to a full body shot (the snake was very actively cruising his enclosure, and my camera skills are subpar, obviously):

Alan, I would have guessed unicolor, but I take your point to be that the phenotypic indeterminacy casts doubt on the current taxonomic classifications. Or am I off base here?

Thanks for the discussion, guys.

- David