Endemic to the island of Madagascar (an island in the IndianĀ Ocean off the southeastern coast of Africa; the 4th largest island in the world), lemurs are a special kind of primates known as prosimians, which, in layman's language, are defined as primitive primates having large ears and eyes, and are characterized by nocturnal habits. These primates are known to be the oldest of their kinds. Having said that, they evolved even before the monkeys came into existence.