Lemur supermodels strike a pose for Photo Ark project. Duke Lemur Center, June 20, 2014. Lemurs don’t sit still for portraits. They sniff the lights. They scent mark the camera lens. They relieve themselves in the middle of the photo shoot. But that doesn’t faze National Geographic photographer Joel Sartore, whose latest lemur photos — taken at the Duke Lemur Center — are now available for viewing.