Mouse lemur

The nocturnal lemurs of the genus Microcebus are known as mouse lemurs. Mouse lemurs, like other lemurs, are endemic to Madagascar. Mouse lemurs are the smallest primates, with a combined head, body, and tail length of fewer than 27 centimeters (11 in) (the smallest species being Madame Berthe's mouse lemur); nonetheless, their weight changes in response to daylight duration. The IUCN declared lemurs and mouse lemurs to be the most endangered vertebrates.

According to Genetics, mouse lemurs contribute to a better knowledge of primatology's biology, behavior, and health. Mouse lemurs are considered prosimian primates. They are among the tiniest and fastest-growing primates, and their numbers are increasing in Madagascar and across the world. Through the investigation of their phenotypes and mutations, these little organisms are helping to prove significant knowledge about the biology and evolution of primates, particularly as a model organism for human medical research.