The true lemurs, or Lemuridae, are one of the five families commonly known just as lemurs. Like all other lemurs, those in this group live on, and only on, the island of Madagascar. They evolved in near isolation after Madagascar split away from the African mainland and, importantly, away from competition with other primates. Lemuridae is a diverse group that includes both solitary and social species, tree-dwellers and those that spend time on the ground and herbivores as well as omnivores. Explore a couple of distinctively marked species from this family of 22 - the ring-tailed and crowned lemurs - using the image links below.