The beautiful little grey mouse lemur is full of quirky contradictions: it's the largest mouse lemur, yet mouse lemurs are the world's smallest primates. It can be described as at once solitary and social, foraging at night alone and convening at common nest sites to sleep the days away with others. Grey mouse lemurs are one of Madagascar's most abundant small mammals and least threatened lemurs, yet a quarter of the population is lost to predators every year, mainly to owls. Their success in the face of this owes perhaps to their small size, high rate of reproduction and varied diet of insects, reptiles and fruit.
Scientific name: Microcebus murinus
Rank: Species
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Honeydew feast
Mouse lemurs attend a midnight feast as the sugary secretions of flatid bugs attract a swarm of insects.
Mouse lemurs attend a midnight feast as the sugary secretions of flatid bugs attract a swarm of insects.
Tonight's the night
With only one chance a year to mate, male mouse lemurs are competitive, but females are still choosy.
With only one chance a year to mate, male mouse lemurs are competitive, but females are still choosy.
The Grey mouse lemur can be found in a number of locations including: Madagascar. Find out more about these places and what else lives there.
The following habitats are found across the Grey mouse lemur distribution range. Find out more about these environments, what it takes to live there and what else inhabits them.
Tropical dry forestDiscover what these behaviours are and how different plants and animals use them.
Additional data source: Animal Diversity Web
Least Concern
Population trend: Decreasing
Year assessed: 2008
Classified by: IUCN 3.1
Opisthokonta
The gray mouse lemur (Microcebus murinus), or lesser mouse lemur, is a small lemur, a type of strepsirrhine primate, found only on the island of Madagascar. Weighing 58 to 67 grams (2.0 to 2.4 oz), it is the largest of the mouse lemurs (genus Microcebus), a group which include the smallest primates in the world. The species is named for its mouse-like size and coloration and is known locally (in Malagasy) as tsidy, koitsiky, titilivaha, pondiky, and vakiandry. Nearly indistinguishable from each other by appearance, the gray mouse lemur and all other mouse lemurs are considered cryptic species. For this reason, the gray mouse lemur was considered the only mouse lemur species for decades until more recent studies began to distinguish between the species.
Like all mouse lemurs, this species is nocturnal and arboreal. It is very active, and although it forages alone, groups of males and females will form sleeping groups and share tree holes during the day. It exhibits a form of dormancy called torpor during the cool, dry winter months, and in some cases undergoes seasonal torpor (or hibernation), which is unusual for primates. The gray mouse lemur can be found in several types of forest throughout western and southern Madagascar. Its diet consists primarily of fruit, insects, flowers, and nectar. In the wild, its natural predators include owls, snakes, and endemic mammalian predators. Predation pressure is higher for this species than among any other primate species, with one out of four individuals taken by a predator each year. This is counterbalanced by its high reproductive rate. Breeding is seasonal, and distinct vocalizations are used to prevent hybridization with species that overlap its range. Gestation lasts approximately 60 days, and typically two young are born. The offspring are usually independent in two months, and can reproduce after one year. The gray mouse lemur has a reproductive lifespan of five years, although captive individuals have been reported to live up to 15 years.
Although threatened by deforestation, habitat degradation, and live capture for the pet trade, it is considered one of Madagascar's most abundant small native mammals. Although it can tolerate moderate food shortages by experiencing daily torpor to conserve energy, extended food shortages due to climate change would pose a significant risk to the species.
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