Zoo question: What animal has an asshole in the middle of its back?

Prince Charles of Arabia by Ronni L. Gordon and David M. Stillman Middle East Quarterly September 1997
http://www.meforum.org/356/prince-charles-of-arabia...//
http://tinyurl.com/y95fvjq
Prince Charles addresses Copenhagen summit, says Earth 'on brink'
Britain's Prince Charles says it's now or never if the world wants to halt climate change / AFP Source: AFP

* Earth on brink of crisis, says prince
* "Partial solution is no solution at all"
* UN wants more from developing nations


ANS: Prince Charles' horse.