Brown Mouse Lemur, MadagascarThe brown mouse lemur (Microcebus rufus) is one of the smallest primates in the world, able to fit in the palm of your hand. They rely heavily on a keen sense of smell and large eyes to navigate in the dark. In colder months, they can enter a state of torpor, slowing their metabolism and sleeping for days at a time to conserve energy — rare among primates. I photographed this one on the island of Nosy Mangabe in Madagascar. Nikon D200 with Nikkor 80-200mm lens (at 185mm) ISO 200, f/10 at 1/60th of a second, Nikon SB-600 flash.