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                Black-and-White Ruffed Lemur

                Black-and-White Ruffed Lemur

                Ruffed lemur

                Kingdom
                Phylum
                Subphylum
                Class
                Order
                Suborder
                Family
                Genus
                SPECIES
                Varecia variegata
                Population size
                1-10 Thou
                Life Span
                19-32 yrs
                TOP SPEED
                20 km/h
                WEIGHT
                3-4 kg
                LENGTH
                100-120 cm

                The Black-and-white ruffed lemur is one of the largest lemurs and the second loudest primate after the howler monkey from central and South America. With its striking black and white pattern, it is amongst the most iconic of the lemur species. Its name comes from the large white furry ‘ruff’ around its neck. It is classified as critically endangered, which makes it one of the most endangered of the lemurs, being just one step from extinction in the wild.

                Distribution

                Black-and-white ruffed lemurs live in eastern Madagascar, in primary and secondary lowland, as well as mid-altitude rainforest. They are tree dwellers and are the most arboreal of the true lemurs.

                Black-and-White Ruffed Lemur habitat map

                Geography

                Continents
                Subcontinents
                Countries

                Climate zones

                Habits and Lifestyle

                These animals live in groups of 2 to 5, such groups apparently representing mated pairs and their young. In some parts of Madagascar, up to 16 individuals form a group, although they divide into smaller subgroups in the cool wet season. The subgroups use different parts of the home range. The females seem to provide the stable basis of the bigger groups.

                These lemurs spend most of their day traveling, feeding and resting high in the forest canopy. As they are diurnal, their most active time is mornings and late afternoons.

                Black-and-white ruffed lemurs, when threatened, defend themselves and their territory (which they have marked with scent) with a near-deafening call.

                Aside from vocalizations, they use facial expressions and body postures to communicate. Tactile communication, through grooming, aggression and play, is also important.

                Group name

                Diet and Nutrition

                Of the lemurs alive today, this species is the most frugivorous, eating fruits, nectar, leaves, and seeds, according to the season. Sometimes they also eat soil.

                Mating Habits

                MATING BEHAVIOR
                REPRODUCTION SEASON
                June-July
                PREGNANCY DURATION
                90-102 days
                BABY CARRYING
                2-3 infants
                INDEPENDENT AGE
                6 months
                BABY NAME
                infant

                The mating system of the Black-and-white ruffed lemurs is little understood. They usually live in what seem to be family groups, based on one mated pair, which indicates the species is monogamous. However, due to variation of the social structure, where larger groups are sometimes formed, it is possible that some populations are polygynous (one male mating with multiple females). The mating season appears to be in June and July. The period of gestation is usually 90 to 102 days. A mother may have up to 6 babies at a time but usually has only 2 or 3. More than 50% of births are twins. A mother can use her mouth to carry the infant, which is obviously different from most lemurs, whose infants cling to the mother's belly when young, then ride on her back as they get heavier. Infants may leave the nest at 3 weeks and are as mobile as their parents by the time they are 7 weeks old. At about 4-5 months old weaning takes place, and infants are almost adult size at 6 months old. Females are sexually mature when 20 months old, but the average age to give birth is 3.4 years.

                Population

                Population threats

                The black-and-white ruffed lemur is under threat by habitat loss as a result of logging, mining, agriculture, and other development. When human activities in Madagascar encroach upon rainforest habitat, this lemur species is one of the first of the lemur species to disappear. Being hunted for meat is also a threat to this rare primate, as unfortunately its daylight activity pattern and large size make it an easy target. It is one of the most heavily hunted lemur species in the country.

                Population number

                According to the Primate Info Net (PIN) resource, the total population number of the Black-and-white ruffed lemur is 1,000 to 10,000 individuals. Today this species' numbers are decreasing and it is classified as Critically Endangered (CR) on the IUCN Red List.

                Ecological niche

                As a frugivore, the Black-and-white ruffed lemur plays a big role in the dispersal of seeds. As prey, they may also have an impact on local food webs.

                Fun Facts for Kids

                • When flowers are in bloom, Black-and-white ruffed lemurs eat their nectar. They stick their long snout into the flower and coat their nose with pollen.
                • These lemurs use their bottom teeth, their "toothcomb", for social bonding through grooming.
                • The Black-and-white ruffed lemurs are one of the larger living species of lemur. Once there were lemurs nearly as big as a female gorilla.
                • Black-and-white ruffed lemurs are the only primates which have true litters of young.
                • These lemurs love to sunbathe while lying on their backs, their arms outstretched.
                • This species of lemur are the only primates to make a nest for their offspring.
                • Black-and-white ruffed lemurs are considered to be the world's largest pollinator, dispersing pollen from the Traveller’s tree.
                • “Lemur” in Latin means “ghost”. When people first heard their loud calls, they thought they came from ghosts in the forest.
                • Lemurs communicate mainly through smell. They “scent-mark” by means of rubbing their bodies against branches to let other lemurs know they were there.

                References

                1. Black-and-White Ruffed Lemur Wikipedia article - https://en.wikipedia.org/wiki/Black-and-white_ruffed_lemur
                2. Black-and-White Ruffed Lemur on The IUCN Red List site - http://www.iucnredlist.org/details/22918/0

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