The Nilgiri tahr (''Nilgiritragus hylocrius'') is an
ungulate
Ungulates ( ) are members of the diverse clade Ungulata which primarily consists of large mammals with hooves. These include odd-toed ungulates such as horses, rhinoceroses, and tapirs; and even-toed ungulates such as cattle, pigs, giraffes, cam ...
that is
endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...
to the
Nilgiri Hills
The Nilgiri Mountains form part of the Western Ghats in northwestern Tamil Nadu, Southern Karnataka, and eastern Kerala in India. They are located at the trijunction of three states and connect the Western Ghats with the Eastern Ghats. At le ...
and the southern portion of the
Western
Western may refer to:
Places
*Western, Nebraska, a village in the US
*Western, New York, a town in the US
*Western Creek, Tasmania, a locality in Australia
*Western Junction, Tasmania, a locality in Australia
*Western world, countries that id ...
and
Eastern Ghats
The Eastern Ghats are a discontinuous range of mountains along India's eastern coast. The Eastern Ghats pass through Odisha, Andhra Pradesh to Tamil Nadu in the south passing some parts of Karnataka as well as Telangana. They are eroded and cut ...
in the states of
Tamil Nadu
Tamil Nadu (; , TN) is a States and union territories of India, state in southern India. It is the List of states and union territories of India by area, tenth largest Indian state by area and the List of states and union territories of India ...
and
Kerala
Kerala ( ; ) is a state on the Malabar Coast of India. It was formed on 1 November 1956, following the passage of the States Reorganisation Act, by combining Malayalam-speaking regions of the erstwhile regions of Cochin, Malabar, South ...
in southern
India
India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...
. It is the state animal of
Tamil Nadu
Tamil Nadu (; , TN) is a States and union territories of India, state in southern India. It is the List of states and union territories of India by area, tenth largest Indian state by area and the List of states and union territories of India ...
.
[Prater, S. H. 1948, 1971. ''The book of Indian Animals'', Bombay Natural History Society and Oxford University Press, India. 324 pages. .] Despite its local name, it is more closely related to the sheep of the genus ''
Ovis
''Ovis'' is a genus of mammals, part of the Caprinae subfamily of the ruminant family Bovidae. Its seven highly sociable species are known as sheep or ovines. Domestic sheep are members of the genus, and are thought to be descended from the wil ...
'' than the ibex and wild goats of the genus ''
Capra
Capra may refer to:
* ''Capra'' (genus), comprising the goats
* Capra (goat dance), a Romanian custom
* Capra (titular see), a titular see in the Catholic Church
* Capra (car), a pick-up brand from the Iranian Bahman Group
People
* Buzz Capra ...
''. It is the
only species in the genus ''Nilgiritragus''.
Etymology
In
Tamil
Tamil may refer to:
* Tamils, an ethnic group native to India and some other parts of Asia
**Sri Lankan Tamils, Tamil people native to Sri Lanka also called ilankai tamils
**Tamil Malaysians, Tamil people native to Malaysia
* Tamil language, nativ ...
, the Nilgiri tahr is called வரையாடு (''varaiaadu''). The word ''varaiaadu'' is derived from the Tamil words ''wurrai'' meaning "
precipice
In geography and geology, a cliff is an area of rock which has a general angle defined by the vertical, or nearly vertical. Cliffs are formed by the processes of weathering and erosion, with the effect of gravity. Cliffs are common on coa ...
" and ''aadu'' meaning "goat". The word in ancient Tamil was வருடை (''varudai''). In
Malayalam
Malayalam (; , ) is a Dravidian language spoken in the Indian state of Kerala and the union territories of Lakshadweep and Puducherry (Mahé district) by the Malayali people. It is one of 22 scheduled languages of India. Malayalam was des ...
, the word is
വരയാട് (''varyaadu'').
[ The Nilgiri tahr was described as ''Capra warryato'' by ]Gray
Grey (more common in British English) or gray (more common in American English) is an intermediate color between black and white. It is a neutral or achromatic color, meaning literally that it is "without color", because it can be composed o ...
.
The genus name ''Nilgiritragus'' is derived from the Tamil
Tamil may refer to:
* Tamils, an ethnic group native to India and some other parts of Asia
**Sri Lankan Tamils, Tamil people native to Sri Lanka also called ilankai tamils
**Tamil Malaysians, Tamil people native to Malaysia
* Tamil language, nativ ...
word ''Neelagiri'' meaning "blue hills" and the Greek
Greek may refer to:
Greece
Anything of, from, or related to Greece, a country in Southern Europe:
*Greeks, an ethnic group.
*Greek language, a branch of the Indo-European language family.
**Proto-Greek language, the assumed last common ancestor ...
word '' trágos'' meaning "goat".
Taxonomy
Results of a phylogenetic
In biology, phylogenetics (; from Greek φυλή/ φῦλον [] "tribe, clan, race", and wikt:γενετικός, γενετικός [] "origin, source, birth") is the study of the evolutionary history and relationships among or within groups o ...
analysis showed that the Nilgiri tahr forms a sister group
In phylogenetics, a sister group or sister taxon, also called an adelphotaxon, comprises the closest relative(s) of another given unit in an evolutionary tree.
Definition
The expression is most easily illustrated by a cladogram:
Taxon A and t ...
with the genus ''Ovis
''Ovis'' is a genus of mammals, part of the Caprinae subfamily of the ruminant family Bovidae. Its seven highly sociable species are known as sheep or ovines. Domestic sheep are members of the genus, and are thought to be descended from the wil ...
'' and has been placed into the monotypic
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...
genus ''Nilgiritragus'' in 2005. It used to be placed in the genus ''Hemitragus'' together with the Himalayan tahr
The Himalayan tahr (''Hemitragus jemlahicus'') is a large even-toed ungulate native to the Himalayas in southern Tibet, northern India, western Bhutan and Nepal. It is listed as Near Threatened on the IUCN Red List, as the population is declini ...
(''H. jemlahicus'') and the Arabian tahr
The Arabian tahr (''Arabitragus jayakari'') is a species of tahr native to eastern Arabia. Until recently, it was placed in the genus '' Hemitragus'', but genetic evidence supports its removal to a separate monotypic genus, ''Arabitragus''.
The ...
(''Arabitragus jayakari''), which are both closer associated with the genus ''Capra
Capra may refer to:
* ''Capra'' (genus), comprising the goats
* Capra (goat dance), a Romanian custom
* Capra (titular see), a titular see in the Catholic Church
* Capra (car), a pick-up brand from the Iranian Bahman Group
People
* Buzz Capra ...
''.
Description
The Nilgiri tahr is a stocky goat with short, coarse fur and a bristly mane. Males are larger than females and of darker colour when mature. Both sexes have curved horns, reaching up to for males and for females. Adult males weigh and stand about tall at the shoulder. Adult males develop a light grey area on their backs, thus are called "saddlebacks".[
]
Distribution and habitat
The Nilgiri tahr can be found only in India. It inhabits the open montane grassland
Montane grasslands and shrublands is a biome defined by the World Wildlife Fund. The biome includes high elevation grasslands and shrublands around the world. The term "montane" in the name of the biome refers to "high elevation", rather than th ...
habitat of the South Western Ghats montane rain forests
The South Western Ghats montane rain forests is an ecoregion in South India, covering the southern portion of the Western Ghats in Karnataka, Kerala and Tamil Nadu at elevations from . Annual rainfall in this ecoregion exceeds .
Setting
The e ...
ecoregion. At elevations from , the forests open into large grasslands interspersed with pockets of stunted forests, locally known as ''shola
Sholas are the local name for patches of stunted tropical montane forest found in valleys amid rolling grassland in the higher montane regions of South India, largely in Kerala, Karnataka and Tamilnadu. These patches of shola forest are found ...
s''. These grassland habitats are surrounded by dense forests at the lower elevations. The Nilgiri tahrs formerly ranged over these grasslands in large herds, but hunting and poaching in the 19th century reduced their population.[
]
Threats
The Nilgiri tahr is primarily threatened by habitat loss
Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby ...
and disturbance caused by invasive species, and in some sites by livestock grazing, poaching
Poaching has been defined as the illegal hunting or capturing of wild animals, usually associated with land use rights.
Poaching was once performed by impoverished peasants for subsistence purposes and to supplement meager diets. It was set a ...
and fragmentation of the landscape.[
]
Conservation
As few as 100 Nilgiri tahrs were left in the wild by the end of 20th century. Since that time, their numbers have increased somewhat; in a comprehensive study of the Nilgiri tahr population in Western Ghats, the WWF-India has put the population at 3,122. Their range extends over from north to south, and Eravikulam National Park
Eravikulam National Park is a 97 km2 national park located along the Western Ghats in the Idukki and Ernakulam districts of Kerala in India. Situated between 10º05'N and 10º20' north, and 77º0' and 77º10' east, (Semap) it is the fi ...
is home to the largest population. Per the wildlife census conducted by Kerala forest department in association with volunteers from College of Forestry and Veterinary Science under Kerala Agricultural University, from April 24–28, 2014, the number of animals in Eravikulam National Park has increased to 894 individuals. This is the highest ever count recorded in the national park, with the first census in 1996 finding only 640 tahrs. The other significant concentration is in the Nilgiri Hills
The Nilgiri Mountains form part of the Western Ghats in northwestern Tamil Nadu, Southern Karnataka, and eastern Kerala in India. They are located at the trijunction of three states and connect the Western Ghats with the Eastern Ghats. At le ...
, with smaller populations in the Anamalai Hills
The Anamala or Anaimalai, also known as the Elephant Mountains, are a range of mountains in the southern Western Ghats of central Kerala (Idukki district, Ernakulam district, Palakkad district, Thrissur district) and span the border of western ...
, Periyar National Park, Palani Hills, and other pockets in the Western Ghats south of Eravikulam, almost to India's southern tip. A small population of tahrs numbering around 200 is known to inhabit the Boothapandi, Azhakiyapandipuram, Velimalai, Kulasekaram, and Kaliyal Ranges in the Kanyakumari district
Kanniyakumari district is one of the 38 districts in Tamil Nadu state and the southernmost district in mainland India. It stands second in terms of population density among the districts of Tamil Nadu. It is also the richest district in Tamil Nad ...
of Tamil Nadu and another small herd of less than 30 animals is known to inhibit Ponmudi Hills in Trivandrum district of Kerala."Squeezing Life out of Ponmudi"
/ref>
See also
* Nilgiri Biosphere Reserve
The Nilgiri Biosphere Reserve is a biosphere reserve in the Nilgiri mountains of the Western Ghats in South India. It is the largest protected forest area in India, spreading across Tamil Nadu, Karnataka and Kerala. It includes the protected ar ...
* Wildlife of India
India is home to a large variety of wildlife. It is a biodiversity hotspot with its various ecosystems ranging from the Himalayas in the north to the evergreen rain forests in the south, the sands of the west to the marshy mangroves of the ea ...
References
Further reading
* Rice, G. Clifford, ''Reproductive biology of Nilgiri tahr, Journal of Zoology, London''
PDF
External links
* ARKive
images and movies of the Nilgiri tahr ''(Hemitragus hylocrius)''
* https://web.archive.org/web/20160110153501/http://nilgiritahrinfo.info/
{{Taxonbar, from=Q839672
Caprids
Mammals of India
Fauna of Kerala
Fauna of Tamil Nadu
Fauna of the Western Ghats
Endemic fauna of the Western Ghats
Nilgiri tahr
The Nilgiri tahr (''Nilgiritragus hylocrius'') is an ungulate that is endemic to the Nilgiri Hills and the southern portion of the Western and Eastern Ghats in the states of Tamil Nadu and Kerala in southern India. It is the state animal of Tami ...