Photographer Captures Hilarious Close Up Portraits of Some of the World's Most Unusual Primates

Mandrill in the mood: Several times during the almost half an hour he sat in front of me he would make this curious facial expression, a crooked smile and twisting the tongue. Normally you would think of showing teeth as a threat, but a mandrill researcher has told me that this particular display is meant to show friendly intentions. He definitely did appear friendly. From the wild in Gabon.