I was once an avid reader of Fuck You, Penguin, but that blog faded into the ether for me a number of years ago. Now he has a bloody book! It took a particular post like this being sent my way to recapture my attention of a brief moment.
The mandrill was once thought to be a type of baboon; categorized under the same genus: papio. In more recent years, the mandrill and the drill have been given their own genus, but they're still recognized as being close relatives of the baboons, and if you ask me, the resemblance is clear in spite of the vibrant color differences.
...plus you know, the shots that the author takes at the mandrill are also quite amusing.