Lemurs are a suborder of primates found only on the island of Madagascar. They exhibit traits like laterally placed eyes and dental specialization. Some notable lemur species described in the document include the ring-tailed lemur, red ruffed lemur, and mouse lemur. These species differ in size, diet, habitat usage, and behaviors like dominance hierarchies and means of balancing in trees. All lemurs face threats from predators like the fossa and habitat destruction by humans on their isolated island home.