Bornean Clouded Leopard
Encyclopedia
The Sunda clouded leopard (Neofelis diardi), also known as the Sundaland clouded leopard and is a medium-sized wild cat
Felidae
Felidae is the biological family of the cats; a member of this family is called a felid. Felids are the strictest carnivores of the thirteen terrestrial families in the order Carnivora, although the three families of marine mammals comprising the superfamily pinnipedia are as carnivorous as the...

 found in Borneo
Borneo
Borneo is the third largest island in the world and is located north of Java Island, Indonesia, at the geographic centre of Maritime Southeast Asia....

 and Sumatra
Sumatra
Sumatra is an island in western Indonesia, westernmost of the Sunda Islands. It is the largest island entirely in Indonesia , and the sixth largest island in the world at 473,481 km2 with a population of 50,365,538...

. In 2006, it was classified as a separate species, distinct from its continental relative Neofelis nebulosa.

In 2008, the IUCN classified the species as vulnerable
Vulnerable species
On 30 January 2010, the IUCN Red List of Threatened Species identified 9694 Vulnerable species, subspecies and varieties, stocks and sub-populations.-References:...

, with a total effective population size suspected to be fewer than 10,000 mature individuals, and a decreasing population trend.

Previously, the species was known as the Bornean clouded leopard — a name publicised by the WWF
World Wide Fund for Nature
The World Wide Fund for Nature is an international non-governmental organization working on issues regarding the conservation, research and restoration of the environment, formerly named the World Wildlife Fund, which remains its official name in Canada and the United States...

 in March 2007, quoting Dr. Stephen O'Brien of the U.S. National Cancer Institute
National Cancer Institute
The National Cancer Institute is part of the National Institutes of Health , which is one of 11 agencies that are part of the U.S. Department of Health and Human Services. The NCI coordinates the U.S...

 as saying, "Genetic research results clearly indicate that the clouded leopard of Borneo should be considered a separate species".

Characteristics

The Sunda clouded leopard is the largest felid in Borneo, and has a stocky build, weighing around 12 to 25 kg (26.5 to 55.1 lb). The canine teeth
Canine tooth
In mammalian oral anatomy, the canine teeth, also called cuspids, dogteeth, fangs, or eye teeth, are relatively long, pointed teeth...

 are two inches long, which, in proportion to the skull length, are longer than those of any other extant feline. Its tail can grow to be as long as its body, aiding balance.

Its coat is marked with irregularly-shaped, dark-edged ovals which are said to be shaped like clouds, hence its common name. Though scientists have known of its existence since the early 19th century, it was positively identified as being a distinct species in its own right in 2006, having long been believed to be a subspecies of the mainland clouded leopard
Clouded Leopard
The clouded leopard is a felid found from the Himalayan foothills through mainland Southeast Asia into China, and has been classified as vulnerable in 2008 by IUCN...

 (Neofelis nebulosa).

Distribution and habitat

The Sunda clouded leopard is probably restricted to Borneo
Borneo
Borneo is the third largest island in the world and is located north of Java Island, Indonesia, at the geographic centre of Maritime Southeast Asia....

 and Sumatra
Sumatra
Sumatra is an island in western Indonesia, westernmost of the Sunda Islands. It is the largest island entirely in Indonesia , and the sixth largest island in the world at 473,481 km2 with a population of 50,365,538...

. In Borneo, they occur in lowland rainforest
Rainforest
Rainforests are forests characterized by high rainfall, with definitions based on a minimum normal annual rainfall of 1750-2000 mm...

, and at lower density, in logged forest. Records in Borneo are below 1500 m (4,921.3 ft). In Sumatra, they appear to be more abundant in hilly, montane areas. It is unknown if there are still Sunda clouded leopards on the small Batu Islands
Batu Islands
The Batu Islands are an archipelago of Indonesia located in the Indian Ocean off the west coast of Sumatra, between Nias and Siberut. The three primary islands, of approximately equal size, are Pini, Tanahmasa, and Tanahbala. There are forty-eight smaller islands, of which less than half are...

 close to Sumatra.

Between March and August 2005, tracks of clouded leopards were recorded during field research in the Tabin Wildlife Reserve
Tabin Wildlife Reserve
Tabin Wildlife Refuge is a nature preserve in Sabah, eastern Malaysia, on the island of Borneo. It was created in 1984 to preserve Sabah’s disappearing wild animals...

 in Sabah
Sabah
Sabah is one of 13 member states of Malaysia. It is located on the northern portion of the island of Borneo. It is the second largest state in the country after Sarawak, which it borders on its southwest. It also shares a border with the province of East Kalimantan of Indonesia in the south...

. The population size in the 56 km² (21.6 sq mi) research area was estimated to be five individuals, based on a capture-recapture analysis of four confirmed animals differentiated by their tracks; with a density estimated at eight to 17 individuals per 100 km² (38.6 sq mi). The population in Sabah is roughly estimated at 1,500–3,200 individuals, with only 275–585 of them living in totally protected reserves that are large enough to hold a long-term viable population of more than 50 individuals.

The first documented film of a Sundaland clouded leopard was taken in June 2009 in Sabah
Sabah
Sabah is one of 13 member states of Malaysia. It is located on the northern portion of the island of Borneo. It is the second largest state in the country after Sarawak, which it borders on its southwest. It also shares a border with the province of East Kalimantan of Indonesia in the south...

.

On Sumatra, Sunda clouded leopards occur most probably in much lower densities than on Borneo. One explanation for this lower density of about 1.29 individuals per 100 km² (38.6 sq mi) might be that on Sumatra clouded leopards co-occur sympatrically with the tiger
Sumatran Tiger
The Sumatran tiger is a tiger subspecies that inhabits the Indonesian island of Sumatra and has been classified as critically endangered by IUCN in 2008 as the population is projected at 176 to 271 mature individuals, with no subpopulation having an effective population size larger than 50...

, whereas on Borneo clouded leopards are the largest carnivores.

Clouded leopard fossils have been found on Java, where it perhaps became extinct in the Holocene
Holocene
The Holocene is a geological epoch which began at the end of the Pleistocene and continues to the present. The Holocene is part of the Quaternary period. Its name comes from the Greek words and , meaning "entirely recent"...

.

Ecology and behaviour

The habits of the Sunda clouded leopard are largely unknown because of the animal's secretive nature. It is assumed that it is generally a solitary creature.

The clouded leopard hunts mainly on the ground and uses its climbing skills to hide from dangers.

Evolutionary and taxonomic history

The genetic analysis of specimens of Neofelis nebulosa and Neofelis diardi implies that the two species diverged 1.4 million years ago, after having used a now submerged land bridge
Land bridge
A land bridge, in biogeography, is an isthmus or wider land connection between otherwise separate areas, over which animals and plants are able to cross and colonise new lands...

 to reach Borneo and Sumatra from mainland Asia.

The split of Neofelis diardi subspecies corresponds roughly with the catastrophic ‘‘super-eruption’’ of the Toba Volcano in Sumatra 69,000–77,000 years ago. A probable scenario is that Sunda clouded leopards from Borneo recolonized Sumatra during periods of low sea levels in the Pleistocene
Pleistocene
The Pleistocene is the epoch from 2,588,000 to 11,700 years BP that spans the world's recent period of repeated glaciations. The name pleistocene is derived from the Greek and ....

, and were later separated from their source population by rising sea levels.

The species was named Felis diardi in honor of the French
France
The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

 naturalist
Natural history
Natural history is the scientific research of plants or animals, leaning more towards observational rather than experimental methods of study, and encompasses more research published in magazines than in academic journals. Grouped among the natural sciences, natural history is the systematic study...

 and explorer Pierre-Médard Diard
Pierre-Médard Diard
Pierre-Médard Diard was a French naturalist and explorer.Diard studied zoology and anatomy under Georges Cuvier and assisted him in researches on the development of the foetus and on the eggs of quadrupeds. In 1816, he traveled to the East Indies....

 by Georges Cuvier
Georges Cuvier
Georges Chrétien Léopold Dagobert Cuvier or Jean Léopold Nicolas Frédéric Cuvier , known as Georges Cuvier, was a French naturalist and zoologist...

 in 1823, based on a drawing and skin allegedly from Java. In the 19th century Felis diardii designated both clouded and Sunda clouded leopards, colloquially "Diard's Cat".

The species was long regarded as a subspecies of the clouded leopard, and named Neofelis nebulosa diardi. In December 2006, the journal Current Biology
Current Biology
Current Biology is a scientific journal that covers all areas of biology, especially molecular biology, cell biology, genetics, neurobiology, ecology and evolutionary biology. The journal is published twice a month and includes peer-reviewed research articles, various types of review articles, as...

published two articles, in which two distinct species of clouded leopard
Clouded Leopard
The clouded leopard is a felid found from the Himalayan foothills through mainland Southeast Asia into China, and has been classified as vulnerable in 2008 by IUCN...

 were reclassified and redefined:
  • Neofelis nebulosa from mainland Asia
    Asia
    Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...

     and
  • Neofelis diardi from the Malay archipelago
    Malay Archipelago
    The Malay Archipelago refers to the archipelago between mainland Southeastern Asia and Australia. The name was derived from the anachronistic concept of a Malay race....

    , except Peninsular Malaysia
    Peninsular Malaysia
    Peninsular Malaysia , also known as West Malaysia , is the part of Malaysia which lies on the Malay Peninsula. Its area is . It shares a land border with Thailand in the north. To the south is the island of Singapore. Across the Strait of Malacca to the west lies the island of Sumatra...

    .

Results of a morphometric
Morphometrics
Morphometrics refers to the quantitative analysis of form, a concept that encompasses size and shape. Morphometric analyses are commonly performed on organisms, and are useful in analyzing their fossil record, the impact of mutations on shape, developmental changes in form, covariances between...

 analysis of the pelages of fifty-seven clouded leopards sampled throughout the genus' wide geographical range indicated that there are two distinct morphological groups, differing primarily in the size of their cloud markings. In another study, DNA samples from the Bornean and mainland Asia populations were used in molecular genetic analyses, revealing differences in mtDNA
Mitochondrial DNA
Mitochondrial DNA is the DNA located in organelles called mitochondria, structures within eukaryotic cells that convert the chemical energy from food into a form that cells can use, adenosine triphosphate...

, nuclear DNA
Nuclear DNA
Nuclear DNA, nuclear deoxyribonucleic acid , is DNA contained within a nucleus of eukaryotic organisms. In mammals and vertebrates, nuclear DNA encodes more of the genome than the mitochondrial DNA and is composed of information inherited from two parents, one male, and one female, rather than...

 sequences, microsatellite and cytogenetic
Cytogenetics
Cytogenetics is a branch of genetics that is concerned with the study of the structure and function of the cell, especially the chromosomes. It includes routine analysis of G-Banded chromosomes, other cytogenetic banding techniques, as well as molecular cytogenetics such as fluorescent in situ...

 variation. Thirty-six fixed mitochondrial and nuclear nucleotide differences, and 20 microsatellite loci with nonoverlapping allele
Allele
An allele is one of two or more forms of a gene or a genetic locus . "Allel" is an abbreviation of allelomorph. Sometimes, different alleles can result in different observable phenotypic traits, such as different pigmentation...

-size ranges distinguished the populations — a degree of differentiation equivalent to, or greater than, comparable measures among the panthera
Panthera
Panthera is a genus of the family Felidae , which contains four well-known living species: the tiger, the lion, the jaguar, and the leopard. The genus comprises about half of the Pantherinae subfamily, the big cats...

 species — and strongly support a species-level distinction between Neofelis nebulosa and Neofelis diardi.

Molecular, craniomandibular and dental analysis indicates subspecifical distinction of Bornean and Sumatran clouded leopards into two populations with separate evolutionary histories — a Bornean subspecies Neofelis diardi borneensis and a Sumatran subspecies Neofelis diardi diardi. Both populations are estimated to have diverged from each other during the Middle to Late Pleistocene
Pleistocene
The Pleistocene is the epoch from 2,588,000 to 11,700 years BP that spans the world's recent period of repeated glaciations. The name pleistocene is derived from the Greek and ....

.

Threats

Sunda clouded leopards being strongly arboreal are forest-dependent, and are increasingly threatened by habitat destruction following deforestation in Indonesia
Deforestation in Indonesia
Deforestation in Indonesia has been a massive environmental impact on the country, home to some of the most biologically diverse forests in the world, ranking third behind Brazil and the Democratic Republic of Congo. As late as 1900, Indonesia was still a densely forested country with the total...

 as well as in Malaysia
Deforestation in Malaysia
Between 1990 and 2005 Malaysia lost 6.6% of its forest cover, or around 1,486,000 hectares.-Background:Malaysia declared its independence from Britain in 1957, and formed its current state in 1963. Since then, it has seen significant economic growth, a large part of which can be attributed to its...

.
Since the early 1970s, much of the forest cover has been cleared in southern Sumatra, in particular lowland tropical evergreen forest. Fragmentation of forest stands and agricultural encroachments have rendered wildlife particularly vulnerable to human pressure. Borneo has one of the world's highest deforestation
Deforestation in Borneo
Borneo, the third largest island in the world, divided between Indonesia, Malaysia and Brunei, was once covered with dense rainforests, but along with its tropical lowland and highland forests, there has been extensive deforestation in the past sixty years. In the 1980s and 1990s the forests of...

 rates. While in the mid-1980s forests still covered nearly three quarters of the island, by 2005 only 52% of Borneo was still forested. Both forests and land make way for human settlement. Illegal trade in wildlife is a widely spread practice.

The population status of Sunda clouded leopards in Sumatra and Borneo has been estimated to decrease due to forest loss, forest conversion, illegal logging, encroachment, and possibly hunting. In Borneo, forest fires pose an additional threat, particularly in Kaltim and in the Sebangau National Park.

There have been reports of poaching
Poaching
Poaching is the illegal taking of wild plants or animals contrary to local and international conservation and wildlife management laws. Violations of hunting laws and regulations are normally punishable by law and, collectively, such violations are known as poaching.It may be illegal and in...

 of Sunda clouded leopards in Brunei's Belait District
Belait District
Belait is the largest district in Brunei, as well as the western-most. The word 'Belait' is taken from the name of the native inhabitants of Belait, the Belait People. The district is administered from the town of Kuala Belait, its capital. Belait is governed by an appointed District Officer. The...

 where locals are selling their pelts at a lucrative price.

Conservation

The species is listed on CITES Appendix I, and is fully protected in Sumatra, Kalimantan
Kalimantan
In English, the term Kalimantan refers to the Indonesian portion of the island of Borneo, while in Indonesian, the term "Kalimantan" refers to the whole island of Borneo....

, Sabah
Sabah
Sabah is one of 13 member states of Malaysia. It is located on the northern portion of the island of Borneo. It is the second largest state in the country after Sarawak, which it borders on its southwest. It also shares a border with the province of East Kalimantan of Indonesia in the south...

, Sarawak
Sarawak
Sarawak is one of two Malaysian states on the island of Borneo. Known as Bumi Kenyalang , Sarawak is situated on the north-west of the island. It is the largest state in Malaysia followed by Sabah, the second largest state located to the North- East.The administrative capital is Kuching, which...

 and Brunei
Brunei
Brunei , officially the State of Brunei Darussalam or the Nation of Brunei, the Abode of Peace , is a sovereign state located on the north coast of the island of Borneo, in Southeast Asia...

. Sunda clouded leopards occur in most protected areas along the Sumatran mountain spine, and in most protected areas on Borneo.

Since November 2006, the Bornean Wild Cat and Clouded Leopard Project based in the Danum Valley Conservation Area
Danum Valley Conservation Area
Danum Valley Conservation Area is a 438 square kilometres tract of relatively undisturbed lowland dipterocarp forest in Sabah, Malaysia. The area holds unique status in the sense that before it became a conservation area there were no human settlements within the area, meaning that hunting,...

 and the Tabin Wildlife Reserve
Tabin Wildlife Reserve
Tabin Wildlife Refuge is a nature preserve in Sabah, eastern Malaysia, on the island of Borneo. It was created in 1984 to preserve Sabah’s disappearing wild animals...

 aims to study the behaviour and ecology of the five species of Bornean wild cat — bay cat
Bay Cat
The Bay Cat , also known as Bornean Cat, Bornean Bay Cat, Bornean Marbled Cat, is a wild cat endemic to the island of Borneo that appears relatively rare compared to sympatric felids, based on the paucity of historical as well as recent records...

, flat-headed cat
Flat-headed Cat
The Flat-headed Cat is a small wild cat patchily distributed in the Thai-Malay Peninsula, Borneo and Sumatra. Since 2008, it has been listed as Endangered by the IUCN due to destruction of wetlands in their habitat...

, marbled cat
Marbled Cat
The Marbled Cat is a small wild cat of South and Southeast Asia. Since 2002 it has been listed as vulnerable by IUCN as it occurs at low densities, and its total effective population size is suspected to be fewer than 10,000 mature individuals, with no single population numbering more than...

, leopard cat
Leopard Cat
The leopard cat is a small wild cat of South and East Asia. Since 2002 it has been listed as Least Concern by IUCN as it is widely distributed but threatened by habitat loss and hunting in parts of its range...

, Sunda clouded leopard — and their prey, with a focus on the clouded leopard; investigate the effects of habitat alteration; increase awareness of the Bornean wild cats and their conservation needs, using the clouded leopard as a flagship species; and investigate threats to the Bornean wild cats from hunting and trade in Sabah.

The Sundaland clouded leopard is one of the focal felids of the project Conservation of Carnivores in Sabah based in northeastern Borneo since July 2008. The project team evaluates the consequences of different forms of forest exploitation for the abundance and density of felids in three commercially used forest reserves. They intend to assess the conservation needs of these felids and develop species specific conservation action plans together with other researchers and all local stakeholders.

Local names

The local names, "Macan Dahan" in Indonesian
Indonesian language
Indonesian is the official language of Indonesia. Indonesian is a normative form of the Riau Islands dialect of Malay, an Austronesian language which has been used as a lingua franca in the Indonesian archipelago for centuries....

 and "Harimau Dahan" in Malay
Malay language
Malay is a major language of the Austronesian family. It is the official language of Malaysia , Indonesia , Brunei and Singapore...

 (also reported historically in Sumatra
Sumatra
Sumatra is an island in western Indonesia, westernmost of the Sunda Islands. It is the largest island entirely in Indonesia , and the sixth largest island in the world at 473,481 km2 with a population of 50,365,538...

), mean "tree branch tiger".

External links



Older newspaper articles still online:
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