Mongoose Lemur

Maximum longevity: 36.2 years (captivity) Observations: One captive female was still alive after 36.2 years in captivity (Richard Weigl 2005).

Details regarding predation upon these animals are lacking. However, it is likely that fossas and raptors may be predators.

Mongoose lemurs are the smallest species of the genus Eulemur, which includes five species. Head and body length averages 35 cm and the tail length averages 48 cm. These animals weigh between 2 and 3 kg.

Pelage in this species is sexually dimorphic. It is woolly and the tails are bushy and gray in both sexes. Males have a gray body with red fur on the side of the body and the face. Males have white beards when they are born that turn red as they grow older. Females are darker gray than males and they have white fur on the sides of the body and face.

Mongoose lemurs have binocular vision, as in other lemurs, and their noses have a rhinarium (unfused nasal projection) to aid in olfactory communication.

Range mass: 2 to 3 kg.

Average length: 35 cm.

Sexual Dimorphism: sexes colored or patterned differently; male more colorful

Other Physical Features: endothermic ; bilateral symmetry

The lifespan of these animals has not been reported. However, another member of the genus, Eulemur fulvus is known to have reached an age of 36 years in captivity. An individual which was a hybrid of E. fulvus and Eulemur macaco lived for 39 years in captivity. It is likely that E. mongoz is similarly long lived, although wild lifespan is likely to be shorter than that seen in captivity.

Average lifespan
Status: captivity: 36.2 years.

Eulemur mongoz may be found in two different habitats. On the island of Madagascar, they are found in drier forests with deciduous trees. However, on the smaller islands, they are found in more humid forests.

Habitat Regions: tropical ; terrestrial

Terrestrial Biomes: forest

Mongoose lemurs, Eulemur mongoz, are found in northwest Madagascar and on the Comoro Islands of Moheli and Anjouan.

Biogeographic Regions: ethiopian (Native )

Other Geographic Terms: island endemic

As in all primates, communication is varied and complex. Visual signals, such as facial expressions and body postures, are often used in communication. In addition, vocalizations are used, especially in marking territories. Chemical communication (i.e. scent marks) are used in marking territories as well. Tactile communication occurs between members of a social group and may include grooming, agonsism, and play.

Communication Channels: visual ; tactile ; acoustic ; chemical

Other Communication Modes: scent marks

Perception Channels: visual ; tactile ; acoustic ; chemical

There are only about 100 mongoose lemurs in captivity worldwide and their habitats are disappearing. Land that is inhabited by mongoose lemurs is being cleared to produce charcoal and farm land. It has been illegal to kill lemurs since 1974, but many local people are unaware of the law. In 1996, IUCN considered the species vulnerable, the CITES have E. mongoz on appendix I and the USDI lists all species of Eulemur as endangered.

US Federal List: no special status

CITES: appendix i

IUCN Red List of Threatened Species: vulnerable

Mongoose lemurs have been hunted and trapped by humans because of their assumed role in raiding and destroying crops.

Negative Impacts: crop pest

Eulemur mongoz is hunted for food and for sale into the pet trade. All lemurs are captivating animals and may play some role in attracting tourists to Madagascar.

Positive Impacts: pet trade ; food ; ecotourism

Because they are frugivorous, these animals may help in dispersing seeds. When they feed upon pollen, they may help some species to pollinate. To the extent that these lemurs are preyed upon by other animals, they may affect local food webs.

Ecosystem Impact: disperses seeds; pollinates

Mongoose lemurs first begin to eat solid food when they are about 5 weeks of age (around the same time they take their first steps). They taste whatever the older members of the group are eating, which includes flowers, pollen, fruit, and leaves.

Mongoose lemurs have very small upper incisors and upper canines and their premolars become vertically smaller posteriorly. The molars are hypocone, but the trigonids and talonids become less distinct toward the posterior. Eulemur species have dental formulas of 0-2/2, 1/1, 3/3, 3/3=32-36.

Plant Foods: leaves; fruit; pollen; flowers

Primary Diet: herbivore (Folivore , Frugivore )

In some areas, these animal appear to form stable monogamous pair bonds. It is possible that in other areas these animals are polygynous, as are other members of the genus.

Mating System: monogamous ; polygynous

Mongoose lemurs reach sexual maturity at about 2 years of age.

Mating is seasonal. Females experience estrus for about one month between April and June. They give birth to a single offspring per year, though twins are not rare. Young are usually born from August to October after a gestation period of about 128 days. Newborn lemurs weigh about 60 to 70 grams at birth and are weaned from their mother at about 135 days of age.

Breeding interval: These lemurs breed once per year.

Breeding season: Females experience estrus for about one month between April and June

Range number of offspring: 1 to 2.

Average gestation period: 128 days.

Average weaning age: 135 days.

Average age at sexual or reproductive maturity (female): 2 years.

Average age at sexual or reproductive maturity (male): 2 years.

Key Reproductive Features: iteroparous ; seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; fertilization ; viviparous

Average birth mass: 53 g.

Average gestation period: 128 days.

Average number of offspring: 1.1.

Average age at sexual or reproductive maturity (female)
Sex: female: 796 days.

Female mongoose lemurs care for their young and nurse them until they are about 135 days old. Maternal care includes grooming, playing, and socialization, as well as carrying of the young when they are small. The role of males in parental care has not been described.

Parental Investment: altricial ; pre-fertilization (Provisioning, Protecting: Female); pre-hatching/birth (Provisioning: Female, Protecting: Female); pre-weaning/fledging (Provisioning: Female, Protecting: Female)

The activity pattern of mongoose lemurs varies with the season, making it very different to that of most other primates (4). Individuals display cathemeral behaviour throughout the wet and dry seasons but, during the dry season, individuals tend to be more nocturnal, switching to more diurnal and/or crepuscular activity at the start of the wet season (4) (8). Fruit appears to dominate the diet throughout the year but flowers, particularly those from the kapok tree, are also eaten during the wet season, and these lemurs are extremely fond of nectar (6) (8). During the dry season, the mongoose lemur supplements its diet with mature and immature leaves (6) (8). The species has also been observed to feed on the occasional grub and beetle (6) (8). On the mainland, mongoose lemurs live in small family groups made up of an adult male, adult female and one to three of their offspring (6), but congregate in larger groups in the Comoros (2). Home ranges are small and often overlap those of other groups. Although neighbouring groups rarely encounter one another, aggressive vocalisations, scent marking, and physical charges and threats are made when they do (8). Females are generally dominant to males, having preferential choice over food and mates (4). Mating is seasonal, with single offspring (rarely twins) being born from August to October, just before the rainy season, after a gestation period of around 126 - 128 days (2) (4) (5). The infant is weaned at approximately 135 days old, and young are forced to leave the group when they mature at around 2.5 to 3.5 years old (4).

It has been illegal to kill lemurs since 1974 but, sadly, many local people are unaware of this law and hunting continues (4). The lemur is protected through its occurrence in the Ankarafantsika Nature Reserve, and captive populations are present in European and North American zoos. Some of these institutions have achieved notable breeding success, and captive breeding and reintroduction programmes are therefore a viable option for future conservation efforts to preserve this small, rare primate (1).

One of the smallest of the five Eulemur species, the mongoose lemur has soft, woolly fur, a relatively long, bushy tail and a pronounced ruff around the neck and ears (4) (5). This species is sexually dimorphic, with the sexes displaying different coat colouration. Males have grey-brown fur on their upper parts, with a slightly darker tip to the tail, much paler, creamy-grey underparts, pale grey faces, and distinctive reddish-brown fur on the sides of the body, cheeks, beard, forehead and back of the neck (4) (6). Males have white beards when born that become red as they mature (4). Females are generally paler grey than males but, like males, usually have a darker tail tip and creamy-grey underparts (6). However, in contrast to the red collar of the males, the cheeks and beard of females form a creamy-grey to white ruff, and the face is darker grey (6) (7). The eyes of both sexes are reddish-orange (6).

On the mainland, habitat includes dry deciduous forests and secondary forests. On the Comoros Islands, this arboreal species is found in humid forest (6).

The mongoose lemur's natural range is restricted to north-west Madagascar, but the species is also found on the Comoros Islands of Moheli and Anjouan, where it is thought to have been introduced (1) (6). A few feral individuals may also exist on Grande Comoro (6).

Classified as Vulnerable (VU A1c, C2a) on the IUCN Red List 2004 (1) and listed under Appendix I of CITES (3).

The principle reason for the decline of the mongoose lemur is habitat loss, as dry-deciduous forests of the north-west continue to be cleared to create pasture and charcoal (6) (8). Additionally, the species is hunted for food throughout much of its range, occasionally trapped for the pet trade, and persecuted for its assumed role in raiding and destroying crops (4) (8). In Comoros, the mongoose lemur faces similar threats (6).

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 Ceiba pentandra trees 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".