Lemurs are a group of strepsirrhine primates that are endemic to Madagascar. They are the most diverse and abundant of the Madagascar primates, with over 100 species and subspecies in six families.
The aye-aye is a species of lemur that belongs to its own family, Daubentoniidae. It is the only living representative of the suborder Chiromyiformes, which diverged from the other strepsirrhines 62 million years ago. It has a unique combination of features, such as rodent-like teeth, a long and flexible middle finger, and a percussive foraging method.
The indri is a species of lemur that belongs to the family Indriidae, along with the sifakas and the woolly lemurs. It is the largest living lemur, with a body length of 64–72 cm and a weight of 6–9.5 kg. It has a distinctive black and white coat, a long tail, and a loud and complex vocalization.
Mouse lemurs are a group of lemur species that belong to the family Cheirogaleidae, along with the dwarf lemurs and the giant mouse lemur. They are the smallest living primates, with a head-body length of 6–13 cm and a weight of 30–100 g. They are nocturnal, arboreal, and insectivorous, and can enter a state of torpor during the dry season.
Sportive lemurs are a group of lemur species that belong to the family Lepilemuridae. They are medium-sized, with a head-body length of 26–28 cm and a weight of 0.7–0.9 kg. They are nocturnal, folivorous, and live in monogamous pairs or solitary. They sleep in tree holes or leaf nests during the day, and are agile leapers at night.