"Flares of white cheeks and a blaze of red on its head gave away the lookout of a spying mangabey. 'Animals like sunset on the beach just as we do, and I often waited to see who would come out then,' Michael Nichols [a National Geographic photographer] says. 'One day this young mangabey came up the mangroves and watched me for five minutes. Then he was gone.'”
From "In the Land of the Surfing Hippos," August 2004, National Geographic magazine