Greater Bamboo Lemur

Prolemur simus
Broad-nosed bamboo lemur, Broad-nosed gentle lemur
The Greater bamboo lemur is an easily recognizable primate with characteristic white tufts on its ears. This animal is the largest of the three bamboo lemur species and one of a few mammals, having a bamboo-based diet. Moreover, this lemur totally depends on bamboo. This unique sedentary primate spends most of its active time feeding on bamboo. Unfortunately, this specialist species cannot adapt to quick changes in its environment. The Greater bamboo lemurs were firstly discovered in 1870. However, due to large-scale clearing and resulting fragmentation of their rainforest habitat, these animals had to live in small, isolated populations and were considered to have gone extinct until the beginning of the 20th century, being discovered again in 1972.
above 500

population size

17 yrs

Life span

2-2.4 kg

Weight

40-45 cm

Length

Disrtibution

The Greater bamboo lemur is a Madagascar primate, inhabiting areas in and around the Ranomafana National Park in south-eastern Madagascar. Additionally, this animal may occur in the Andringitra Massif and near Vondrozo. Preferred habitat of the Greater bamboo lemur is humid primary rainforest with tall bamboo trees.

Habits and lifestyle

These lemurs are social creatures, forming groups of up to 28 individuals, although an average group size is 4 - 7 animals. They occasionally occur in mixed groups with Brown lemurs and Gray gentle lemurs. The social system of Greater bamboo lemurs is unknown. However, unlike most lemurs, males of this species are likely to dominate females. As crepuscular animals, Greater bamboo lemurs are generally active at dawn and dusk. However, these animals have also been reported to be active nocturnally. Greater bamboo lemurs are tree-dwelling primates, but spend considerable amount of time on the ground. Greater bamboo lemurs communicate with each other through vocalizations. One of the main calls is the contact call - a strong yelping vocalization, which gathers the group members. Another important call is the repeated alarm signal, given out when threatened or disturbed and pronounced "ouik-grrraaa".

group name

conspiracy, troop

Diet and nutrition

Greater bamboo lemurs are herbivores (folivores). The diet of this species consists of 98% giant bamboo and 2% flowers, leaves, soil and fruits. Unlike other lemurs, these animals are known to consume mature leaves.

Mating habits

Greater bamboo lemurs are polygynous, which means that one male mates with multiple females. Mating occurs in May-June. Females generally give birth in November, which coincides with the transitional dry and wet seasons. A single infant is born after a gestation period of 142 - 149 days. During the first 5 weeks of its life, the newborn lemur is cared by its mother. When the infant is 7 - 8 weeks old, the mother gradually deceases nursing, after which the baby begins to explore its surroundings, venturing to faraway areas. Weaning takes place at about 8 months old. And finally, at 3 - 4 years old, young males leave their natal groups.

Mating behavior

Reproduction season

May-June

Pregnancy duration

142-149 days

Independent age

8 months
infant

baby name

1 infant

baby carrying

Population

Population Trend

Population status

ne
dd
lc
nt
vu
en
cr
ew
ex

Population threats

One of the biggest threats to the population of this endangered species is large-scale cutting of bamboo trees, on which the Greater bamboo lemurs are dependent. Another serious concern is destruction of rainforests for slash-and-burn agriculture. Furthermore, localized hunting as well as habitat disturbance, fragmentation and destruction are compounded by very small natural range. Additionally, the Greater bamboo lemurs are unable to successfully breed due to living in small, isolated populations. On the other hand, some of these isolated populations in lowland areas are known to carry various parasites, threatening not only their health, but also lifespan.

Population number

According to the IUCN Red List, the total population of Greater bamboo lemurs is over 500 individuals, living in 11 subpopulations. Each of these subpopulations contains less than 250 adult lemurs. Overall, the population of Greater bamboo lemurs is decreasing today, and these animals are classified as Critically Endangered (CR) on the IUCN Red List.

Ecological niche

The role of Greater bamboo lemurs in the ecosystem of their habitat is insufficiently explored, although their diet allows them to serve as important seeds dispersers of some plants and primarily - bamboo.

Fun facts for kids

  1. Possibly the world's fourth largest island, Madagascar is slightly larger than the state of California. Since the island divided from Africa around 160 million years ago, as much as 80% of its plant and animal species (including lemurs) are native and endemic exclusively to Madagascar. A study, published in 2010, has revealed that lemurs use ‘rafts’ of floating vegetation or driftwood to get to Madagascar. Riding on these rafts, some individuals take long trips of up to 270 miles from continental to the island.
  2. Lemurs belong to prosimian species. The word 'prosimian' literally means 'before monkeys'. As a matter of fact, these animals once inhabited continental Africa, but were later displaced by monkeys - their main competitors for food. As a result, lemurs are currently found only in Madagascar.
  3. The word 'lemur' means ‘ghost’ or ‘spirit of the dead’ in Latin. These animals are so called due to their specific vocalizations. When first hearing the unusually loud, "eerie" shrieks of lemurs in the forest canopy, early explorers thought they had heard voices of spirits.
  4. These animals easily adapt to their environment. If necessary, they are able to reduce their metabolism and reproduction rate.

References

  1. Greater Bamboo Lemur Wikipedia article
    https://en.wikipedia.org/wiki/Greater_bamboo_lemur
  2. Greater Bamboo Lemur on The IUCN Red List site
    http://www.iucnredlist.org/details/9674/0