Mammals
Gray Mouse Lemur
Microcebus murinus · also called grey mouse lemur
Foraging alone through the darkened understorey of a Madagascan forest, a gray mouse lemur represents one of the smallest primates on Earth, capable of slipping into a low-energy torpor whenever food becomes scarce and living surprisingly long for its tiny size.
Overview
The gray mouse lemur, Microcebus murinus, is one of the smallest living primates, native to forest habitat across parts of Madagascar. Its remarkable ability to enter energy-saving torpor, surprisingly long lifespan relative to its tiny body, and growing importance as a scientific model for ageing research make it one of the most biologically valuable small primates found anywhere in the world.
A tiny primate with an outsized scientific role
Despite weighing barely more than a few coins, the gray mouse lemur has become genuinely significant to science, its combination of small size and unusually long lifespan making it a uniquely useful model for understanding how ageing works across the animal kingdom.
Status
Least Concern, remaining widespread and locally common across suitable forest habitat throughout parts of Madagascar.
Gray Mouse Lemur: common questions
How small is the gray mouse lemur?
This species is among the smallest primate species alive, weighing only a small fraction of the size of most other lemur species found across Madagascar, making it one of the tiniest members of the entire primate order.
Why is the gray mouse lemur important to ageing research?
This species has become an important model organism for scientific research into ageing, since it can live for a surprisingly long time relative to its small body size under the right conditions, offering researchers insight into the biology of longevity in a genuinely small-bodied primate.
What happens when the gray mouse lemur enters torpor?
This species can enter a state of torpor, temporarily lowering its body temperature and metabolic rate to conserve energy during periods when food is scarce or conditions are unfavourable, a survival strategy that helps it endure lean stretches without needing to forage constantly.
How does the gray mouse lemur communicate with other individuals?
This species relies heavily on scent marking to communicate information about identity, reproductive status, and territory, a form of communication especially useful for a solitary, nocturnal species that may rarely encounter other individuals face to face.