The mongoose lemur (Eulemur mongoz) is a small primate in the family Lemuridae, native to Madagascar and introduced to the Comoros Islands. These arboreal animals have pointed faces, long, bushy tails, dark-brown upper parts, pale bellies, and beards, which are reddish in males and white in females. They live in family groups and feed primarily on fruit, but also eat leaves, flowers, and nectar, with nectar from the kapok tree making up a large part of their diet during the dry season. They have declined sharply in numbers because of habitat destruction and hunting, and the International Union for Conservation of Nature has rated their conservation status as "critically endangered". Description The mongoose lemur ranges in size from long plus a tail of . Both sexes are born with white beards, but become obviously dimorphic around six weeks of age when the males develop red beards and red cheeks. The males also have lighter faces than the females. Males may further distinguish themselves when scent-marking territory, as they occasionally develop a bald patch on top of their heads from rubbing. Distribution The mongoose lemur lives in dry deciduous forests on the island of Madagascar and in the humid forests on the islands of the Comoros. This makes the mongoose lemur one of only two lemurs found outside of Madagascar, though it is an introduced species in the Comoros. Ecology The mongoose lemur mostly eats fruit, though flowers, leaves, and nectar also make up part of its diet. As such, mongoose lemurs act as both pollinators and seed dispersers, but may use the nectar of the kapok tree for nearly 80% of their diet in some parts of their range during the dry season. Feeding on grubs and beetles has also been observed. They are unusual among primates in that they are diurnal or nocturnal, depending on the season, being more active during the day in the wet season and changing activity to the night during the hotter dry season. Mongoose lemurs are arboreal, with the ability to jump several meters from one tree to another. They live in small family groups, usually consisting of a bonded pair and one to three offspring. These groups rarely encounter one another, but when they do, they are aggressive. Young are born just prior to the rainy season, from August to October. Gestation lasts about four months and weaning takes place around five months