Lemurs are found only in Madagascar and the neighbouring Comoro Islands. It is believed that the ancestors of today's lemurs crossed over from Africa on floating vegetation. Isolated on this island for about 50 million, without any monkeys and apes to compete with, they evolved into about 50 different species of lemurs and related prosimians.
Lemurs are the biggest prosimians.
Lemurs can jump from tree to tree from a vertical position as well as horizontal. They have strong legs which longer than their arms, and they have opposable thumbs and toes to grip branches firmly. They also run quickly along branches on all four limbs. Tails are not prehensile and lemurs cannot hang from them. The Ruffed Lemur is the largest living True Lemur.