
Iroquois the red-bellied lemur poses for his portrait. Iroquois turned 24 this year, a ripe old age for a lemur. “Thanks to our vet staff many of our animals live to be fairly old,” said primate technician Steve Coombs, who takes care of Iroquois. Photo by Joel Sartore. ©PhotoArk.com

Presley the blue-eyed black lemur peers into the camera during a portrait session with National Geographic photographer Joel Sartore. Blue-eyed black lemurs are the only primate species besides humans to have truly blue eyes. Photo by Joel Sartore. ©PhotoArk.com

Representing one of the 25 most endangered primates in the world, Poots is one of fewer than three dozen blue-eyed black lemurs in captivity in the U.S. But there is hope: In another year or two Poots will be old enough to reproduce, which will bring the number of breeding females of her species in the U.S. from two to three. All of them live at the Duke Lemur Center. Photo by Joel Sartore. ©PhotoArk.com