Lemur babies are called pups, and they open their eyes at birth and weigh about the same as a cup of water. Their heads are large, their arms are long and they are approximately 4 inches in length.
Following birth, a pup rides on his mother's back, and he begins foraging for leaves, flowers, bark, sap and small invertebrates at 2 weeks, but his mother will nurse him for two years. Female lemurs then join the troop of approximately 17 predominately reproducing females, while the males join another troop. The life span for lemurs is about 18 years, but due to habitat destruction, they are listed on the IUCN Red List.