Crowned lemur
- The crowned lemur is the smallest member of the genus Eulemur, and males and females have different coloration: females are grey with an orange “tiara”, males reddish-brown with a black-and-orange “crown”.
- Groups are small (usually a pair with offspring) and matriarchal; the long non-prehensile tail is used for balance when leaping.
- Gestation lasts about 125 days, and the female usually gives birth to one or two young in the rainy season.
- Despite its small size the species plays an important role in seed dispersal in the northern forests of the island.
- Fruit makes up 80–90 % of the diet, and in the dry season the lemurs switch to leaves and flowers, showing high dietary flexibility.
- The crowned lemur is a striking example of sexual dichromatism among Madagascar’s primates.
- The lower incisors and canines form a “tooth comb” for grooming — a typical lemur trait.
- Crowned lemurs are among the few lemurs that regularly traverse the razor-sharp limestone tsingy fields of Ankarana Reserve.
- The species is listed as Endangered because of forest loss and hunting, although it tolerates fragmentation better than many other lemurs.
Age
The crowned lemur has a theoretical lifespan from 13 years 6 months to 27 years, a typical lifespan from 18 to 30 years, and a maximum lifespan of 27 years; the age of sexual maturity occurs in the period from 1 year 6 months to 2 years. The "Embryo" stage is characterized by the development of the embryo inside the mother, followed by the "Infant" stage, when the infant is born with open eyes, clings to the mother's fur, and feeds on milk, this stage lasts from 1 day to 5 months. Then comes the "Adult" stage, which lasts from 2 to 20 years, during which the species lives in a group, searches for food, and can produce offspring.
Phenotype
The crowned lemur has soft and dense fur that helps the young grip their mother. A black crown of long fur on the head serves to identify the sex of the adult; the species possesses large eyes that see well in twilight, when the animal is active. The adult has four limbs, with long hind legs enabling large jumps, and a long tail that aids in balance during leaps between trees.
Physiology
The crowned lemur’s body height ranges from 17.8 centimeters to 4.5 meters, with a body length of 30 to 36 centimeters and a mass of 1.65 kilograms; the embryo stage has a body mass ranging from 1 to 15 grams, while the infant stage exhibits a body mass between 50 and 120 grams and a body length of 10 to 15 centimeters; the adult stage displays a body mass from 1 to 1.3 kilograms and a body length of 30 to 36 centimeters.
Habitat
Crowned lemurs inhabit land and forests at elevations up to 500 meters above sea level. The species lives in tropical dry forests characterized by heat, a dry season, and deciduous trees. The climate is hot year-round, with frequent rain but occasional dryness; winters have little precipitation, while summers experience more rainfall. Crowned lemurs are found in areas where winter precipitation is low, summer rains occur, and it is always hot.
Shelter
Crowned lemurs are found in tree canopies and do not have permanent or long-term shelters. The species does not use fixed or long-lasting dens, instead relying on the foliage for protection from predators and for resting. They do not have designated shelters.
Geography
Crowned lemurs are native to the Afrotropical realm.
Feeding
The crowned lemur’s diet consists primarily of fruits, young leaves, and tree flowers, and it occasionally catches insects. The species gathers food on trees using its teeth and paws, consuming fruits, leaves, flowers, insects, nectar, and berries. Its foraging strategy involves searching for and obtaining food. Daily food intake ranges from 150 to 250 grams. The crowned lemur’s prey includes beetles, butterflies, flies, true bugs, dragonflies, mayflies, and lacewings.
Reproduction
Crowned lemurs inhabit terrestrial environments and develop on land, away from bodies of water; the female gives birth to live young on land, without hatching from eggs or larvae. The gestation period is 4 months and 1 week, and the female carries one offspring for about four months. A litter has 1 individual, and the newborn immediately clings to the mother’s fur for an extended period. The young reach maturity between 1 year 6 months and 2 years. The species reproduces through homogamy, always with fertilization and without generational change. The interval between reproductive events is from 1 to 2 years. Eggs, larvae, or offspring develop in a nest built on the ground or close to it, or high in the branches of a bush or tree.