The Grizzled Squirrel Wildlife Sanctuary (GSWS), also known as Srivilliputhur Wildlife Sanctuary, was established in 1988 to protect the

Near threatened A near-threatened species is a species which has been categorized as "Near Threatened" (NT) by the International Union for Conservation of Nature as that may be vulnerable to endangerment in the near future, but it does not currently qualify fo ...

grizzled giant squirrel (''Ratufa macroura''). Occupying an area of 485.2 km², it is bordered on the southwest by the

Periyar Tiger Reserve Periyar National Park and Wildlife Sanctuary (PNP) is a protected area located in the districts of Idukki and Pathanamthitta in Kerala, India. It is notable as an elephant reserve and a tiger reserve. The protected area encompasses , of whi ...

and is one of the best preserved forests south of the

Palghat Gap Palakkad Gap or Palghat Gap is a low mountain pass in the Western Ghats between Coimbatore in Tamil Nadu and Palakkad in Kerala. It has an average elevation of with a width of . The pass is located between the Nilgiri Hills to the north ...

. The sanctuary covers in western

Tamil Nadu Tamil Nadu (; , TN) is a state in southern India. It is the tenth largest Indian state by area and the sixth largest by population. Its capital and largest city is Chennai. Tamil Nadu is the home of the Tamil people, whose Tamil language ...

South India South India, also known as Dakshina Bharata or Peninsular India, consists of the peninsular southern part of India. It encompasses the Indian states of Andhra Pradesh, Karnataka, Kerala, Tamil Nadu, and Telangana, as well as the union terr ...

in the eastern water-shed of the Western Ghats and consists of high hills and valleys, with a number of peaks reaching up to .

Geography

The Grizzled Squirrel Wildlife Sanctuary is located from 9° 21' to 9° 48' N and 77°21' to 77°46' E. The sanctuary lies mostly in

Virudhunagar district Virudhunagar District is a district (an administrative district) of Tamil Nadu state in south India. Virudhunagar is the district headquarters of Virudhunagar district. Virudhunagar district was formed by the separation of Old Ramanathapuram D ...

especially in Srivilliputtur and partly in

Madurai district Madurai district is one of the 38 districts of the state of Tamil Nadu in southeastern India., United States National Geospatial-Intelligence Agency The city of Madurai serves as the district headquarters. It houses the famous Sri Meenaksh ...

. The sanctuary is bounded to the north by the Andipatti hills, south by Tirunelveli District, east by

Srivilliputhur Srivilliputhur (), is a Municipality in Virudhunagar district in the Indian state of Tamil Nadu. As of 2011, the town had a population of 75,396. The most important landmark of Srivilliputhur is 11-tiered tower structure dedicated to the Vata ...

and Rajapalayam towns and west by

Theni Theni is a valley town situated in the Indian state of Tamil Nadu at the foothills of Western Ghats. It is the headquarters of the Theni district, located in a distance of 70km from Madurai. It is known for the large-scale trading of garlic, c ...

town and Theni District. It is the eastern boundary for the

Periyar river Periyar, , (meaning: ''big river'') is the longest river and the river with the largest discharge potential in the Indian state of Kerala. It is one of the few perennial rivers in the region and provides drinking water for several major towns ...

watershed. This sanctuary is contiguous to

on the south western side and the Megamalai Reserve Forest on the north western side and Its southern limit is contiguous with the Sivagiri Reserved Forest of Tirunelveli Forest Division. The elevation ranges from in the plains and rises to the highest peak, Kottamala, at . Average annual rainfall varies between - in different areas of the sanctuary. Water sources for the sanctuary are the Kallar and

Mullaperiyar Dam Mullaperiyar Dam , is a masonry gravity dam on the Periyar River in the Indian state of Kerala It is located above the sea level, on the Cardamom Hills of the Western Ghats in Thekkady, Idukki District of Kerala, India. It was constructed b ...

s and the

Periyar Erode Venkatappa Ramasamy (17 September 1879 – 24 December 1973), revered as Periyar or Thanthai Periyar, was an Indian social activist and politician who started the Self-Respect Movement and Dravidar Kazhagam. He is known as the 'F ...

, Naragaiar, Pachaiar, Mangar, Kovilar and Pairakudraiar rivers. The underlying rock throughout the area is granitoid

gneiss Gneiss ( ) is a common and widely distributed type of metamorphic rock. It is formed by high-temperature and high-pressure metamorphic processes acting on formations composed of igneous or sedimentary rocks. Gneiss forms at higher temperatures a ...

formation. The lowest altitudes have a mixture of

quartz Quartz is a hard, crystalline mineral composed of silica ( silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical f ...

and

quartzite Quartzite is a hard, non- foliated metamorphic rock which was originally pure quartz sandstone.Essentials of Geology, 3rd Edition, Stephen Marshak, p 182 Sandstone is converted into quartzite through heating and pressure usually related to tec ...

Fauna

In addition to grizzled giant squirrels, other animals seen here are

Bengal tiger The Bengal tiger is a population of the '' Panthera tigris tigris'' subspecies. It ranks among the biggest wild cats alive today. It is considered to belong to the world's charismatic megafauna. The tiger is estimated to have been present i ...

bonnet macaque The bonnet macaque (''Macaca radiata''), also known as zati,Chambers English Dictionary is a species of macaque endemic to southern India. Its distribution is limited by the Indian Ocean on three sides and the Godavari and Tapti Rivers, along wit ...

common langur Gray langurs, also called Hanuman langurs and Hanuman monkeys, are Old World monkeys native to the Indian subcontinent constituting the genus ''Semnopithecus''. Traditionally only one species ''Semnopithecus entellus'' was recognized, but since a ...

elephants Elephants are the largest existing land animals. Three living species are currently recognised: the African bush elephant, the African forest elephant, and the Asian elephant. They are the only surviving members of the family Elephantidae ...

flying squirrel Flying squirrels (scientifically known as Pteromyini or Petauristini) are a tribe of 50 species of squirrels in the family Sciuridae. Despite their name, they are not in fact capable of full flight in the same way as birds or bats, but they a ...

gaur The gaur (''Bos gaurus''; ), also known as the Indian bison, is a bovine native to South Asia and Southeast Asia, and has been listed as Vulnerable on the IUCN Red List since 1986. The global population was estimated at a maximum of 21,000 m ...

Indian giant squirrel The Indian giant squirrel or Malabar giant squirrel (''Ratufa indica'') is a large multi-coloured tree squirrel species endemic to forests and woodlands in India. It is a diurnal, arboreal, and mainly herbivorous squirrel. Distribution and ...

leopard The leopard (''Panthera pardus'') is one of the five extant species in the genus '' Panthera'', a member of the cat family, Felidae. It occurs in a wide range in sub-Saharan Africa, in some parts of Western and Central Asia, Southern Russia, ...

lion-tailed macaque The lion-tailed macaque (''Macaca silenus''), also known as the wanderoo, is an Old World monkey endemic to the Western Ghats of South India. Characteristics Lion-tailed macaques are covered in black fur, and have a striking gray or silver ...

s, mouse deer,

Nilgiri langur The Nilgiri langur (''Semnopithecus johnii'') is a langur (a type of Old World monkey) . This primate has glossy black fur on its body and golden brown fur on its head. It is similar in size and long-tailed like the gray langurs. Females have ...

, Nilgiri Tahrs, palm civets,

porcupine Porcupines are large rodents with coats of sharp spines, or quills, that protect them against predation. The term covers two families of animals: the Old World porcupines of family Hystricidae, and the New World porcupines of family, Erethiz ...

, sambar, slender loris,

sloth bear The sloth bear (''Melursus ursinus'') is a myrmecophagous bear species native to the Indian subcontinent. It feeds on fruits, ants and termites. It is listed as vulnerable on the IUCN Red List, mainly because of habitat loss and degradation ...

spotted deer The chital or cheetal (''Axis axis''; ), also known as the spotted deer, chital deer, and axis deer, is a deer species native to the Indian subcontinent. It was first described and given a binomial name by German naturalist Johann Christian Po ...

tree shrews The treeshrews (or tree shrews or banxrings) are small mammals native to the tropical forests of South and Southeast Asia. They make up the entire order Scandentia, which split into two families: the Tupaiidae (19 species, "ordinary" treeshre ...

wild boar The wild boar (''Sus scrofa''), also known as the wild swine, common wild pig, Eurasian wild pig, or simply wild pig, is a suid native to much of Eurasia and North Africa, and has been introduced to the Americas and Oceania. The species i ...

and wild cats. Resident and migrating elephants are common. The wildlife census in 2002 counted 156 elephants. There were more grizzled giant squirrels sighted in 2009 than in 2008. In 2008, a group of 30

lion-tailed macaques The lion-tailed macaque (''Macaca silenus''), also known as the wanderoo, is an Old World monkey endemic to the Western Ghats of South India. Characteristics Lion-tailed macaques are covered in black fur, and have a striking gray or silve ...

were sighted during the annual census, but in the 2009 census more than 45 lion-tailed macaques, including a sizeable number of young macaques, were sighted in a single group between Nagariyar and Periyakavu patch. Nilgiri Tahr have been sighted in the entire division starting from Kottamala in Rajapalayam to Perumal Malai in

Sathuragiri Hills Sathuragiri Hills (; ), also known as "Chathuragiri" or "Sundara Mahalingam", is a pilgrimage site located 10 km from Watrap, near Srivilliputhur, in the state of Tamil Nadu in South India. The hills are a part of the Western ghats. Ther ...

near Sundara Mahalingam temple in Saptoor. A

tiger The tiger (''Panthera tigris'') is the largest living Felidae, cat species and a member of the genus ''Panthera''. It is most recognisable for its dark vertical stripes on orange fur with a white underside. An apex predator, it primarily pr ...

was also seen in Sathuragiri during the 2009 census. In recent years there has been a significant increase in the population of the tahrs with the census in 2011 putting their numbers at 220 individuals. Recognised as an

Important Bird Area An Important Bird and Biodiversity Area (IBA) is an area identified using an internationally agreed set of criteria as being globally important for the conservation of bird populations. IBA was developed and sites are identified by BirdLife Inte ...

, over 275 species of birds are seen in this sanctuary including 14 species of birds endemic to the Western Ghats, such as the critically endangered Oriental white-backed vulture and the

long-billed vulture The Indian vulture (''Gyps indicus'') is an Old World vulture native to India, Pakistan and Nepal. It has been listed as Critically Endangered on the IUCN Red List since 2002, as the population severely declined. Indian vultures died of kidney ...

vulnerable species A vulnerable species is a species which has been categorized by the International Union for Conservation of Nature as being threatened with extinction unless the circumstances that are threatening its survival and reproduction improve. Vulnera ...

Nilgiri wood-pigeon, broad-tailed grass warbler, red-faced malkoha and the white-bellied shortwing (''Brachypteryx major'') and

near threatened A near-threatened species is a species which has been categorized as "Near Threatened" (NT) by the International Union for Conservation of Nature as that may be vulnerable to endangerment in the near future, but it does not currently qualify fo ...

species like the great pied hornbill,

Nilgiri pipit The Nilgiri pipit (''Anthus nilghiriensis'') is a distinctive species of pipit that is endemic to the high altitude hills of southern India. Richer brown in colour than other pipits in the region, it is distinctive in having the streaking on th ...

, black-and-orange flycatcher and the Nilgiri flycatcher. The Malayan night heron is of lesser concern. The primary raptors here are the serpent eagle,

hawk Hawks are birds of prey of the family Accipitridae. They are widely distributed and are found on all continents except Antarctica. * The subfamily Accipitrinae includes goshawks, sparrowhawks, sharp-shinned hawks and others. This subfa ...

s and black eagle. A bird survey in 2013 observed in the sanctuary rare endemic species including Sri Lankan frogmouth, mountain and rufous-bellied hawk-eagles, great Indian and Malabar pied hornbills,

mountain A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher ...

and green imperial pigeons which are all species found only in the higher altitudes of Western Ghats. Some of the rare migratory birds spotted included the

steppe eagle The steppe eagle (''Aquila nipalensis'') is a large bird of prey. Like all eagles, it belongs to the family Accipitridae. The steppe eagle's well-feathered legs illustrate it to be a member of the subfamily Aquilinae, also known as the "booted ...

Eurasian sparrowhawk The Eurasian sparrowhawk (''Accipiter nisus''), also known as the northern sparrowhawk or simply the sparrowhawk, is a small bird of prey in the family Accipitridae. Adult male Eurasian sparrowhawks have bluish grey upperparts and orange-barr ...

and bluecapped rockthrush. The sanctuary has numerous

reptile Reptiles, as most commonly defined are the animals in the class Reptilia ( ), a paraphyletic grouping comprising all sauropsids except birds. Living reptiles comprise turtles, crocodilians, squamates ( lizards and snakes) and rhynchocephalia ...

s including king cobras,

Indian rock python The Indian python (''Python molurus'') is a large python species native to tropical and subtropical regions of the Indian subcontinent and Southeast Asia. It is also known by the common names black-tailed python, Indian rock python, and Asian ...

and many endemic species namely pit vipers, ornate flying snake, ''

Draco Draco is the Latin word for serpent or dragon. Draco or Drako may also refer to: People * Draco (lawgiver) (from Greek: Δράκων; 7th century BC), the first lawgiver of ancient Athens, Greece, from whom the term ''draconian'' is derived * ...

'' or gliding lizard, large-scaled calotes and '' Monilesaurus ellioti'' and

amphibian Amphibians are four-limbed and ectothermic vertebrates of the class Amphibia. All living amphibians belong to the group Lissamphibia. They inhabit a wide variety of habitats, with most species living within terrestrial, fossorial, arbo ...

s including endemic ones like ''

Micrixalus ''Micrixalus'' (commonly known as dancing frogs, tropical frogs, and torrent frogs) is a genus of frogs from that are endemic to the Western Ghats in India. They are monotypic within the family Micrixalidae. Before being raised to the family ...

'', ''

Indirana ''Indirana'' is a genus of frogs in the family Ranixalidae. These frogs are endemic to the Western Ghats of India. They are sometimes known under the common name Indian frogs, whereas members of their parent family are named "leaping frogs" ...

'', ''

Nyctibatrachus ''Nyctibatrachus'' is a genus of frogs endemic to the Western Ghats of southwestern India. Their common name is night frogs. Their scientific name also means "night frog", in reference to their habits and dark color. They are the only ext ...

'', '' Ramanella'', ''

Rhacophorus malabaricus The Malabar gliding frog or Malabar flying frog (''Rhacophorus malabaricus'') is a rhacophorid tree frog species found in the Western Ghats of India. Pictures The term "gliding" frog refers to its ability to break its fall by stretching ...

'', ''

Raorchestes ''Raorchestes'' is a genus of frogs in the subfamily Rhacophorinae that are found in mountainous regions of South Asia, Southeast Asia, and southern China. A recent study places ''Raorchestes'' as a sister taxon of '' Pseudophilautus''. Before ...

'' and ''

Pseudophilautus ''Pseudophilautus'' is a genus of shrub frogs in the family Rhacophoridae endemic to the Western Ghats of southwestern India and to Sri Lanka where the majority of the species are found. Many of them are already extinct (marked with † in t ...

''. There are over 220 species of

butterflies Butterflies are insects in the macrolepidopteran clade Rhopalocera from the order Lepidoptera, which also includes moths. Adult butterflies have large, often brightly coloured wings, and conspicuous, fluttering flight. The group comprises ...

documented in the sanctuary including many rare and endemic species. Some of the rare butterflies spotted here include Evershed's ace, silver royal, orange awlet, and Hampson's hedge blue.

Flora

The sanctuary is a mix of tropical evergreen forests and semi-evergreen forests (), dry deciduous forests and moist mixed deciduous forests (),

grassland A grassland is an area where the vegetation is dominated by grasses ( Poaceae). However, sedge ( Cyperaceae) and rush ( Juncaceae) can also be found along with variable proportions of legumes, like clover, and other herbs. Grasslands occur na ...

() and cultivated () km². The sanctuary has one

Medicinal Plant Medicinal plants, also called medicinal herbs, have been discovered and used in traditional medicine practices since prehistoric times. Plants synthesize hundreds of chemical compounds for various functions, including defense and protection ag ...

Conservation Area (MPCA) located at Thaniparai. 69 plant species belonging to 58 taxa and 42 families are used by the Paliyar tribal people, living in the sanctuary, to treat 15 ailments.

Conservation

The conservation problems affecting the sanctuary are human-elephant conflict, human encroachment, cattle grazing and forest fire. Within the sanctuary, there are 7 to 10 temples which attract thousands of pilgrims every year.

Water scarcity Water scarcity (closely related to water stress or water crisis) is the lack of fresh water resources to meet the standard water demand. There are two types of water scarcity: physical or economic water scarcity. Physical water scarcity is whe ...

is a major problem during dry season due to lack of perennial water source. Measures have been taken to conserve the wildlife in the sanctuary. The entry of cattle into the sanctuary is prevented, particularly in Kottamalai and Watrap. Leases for collection of fruits and minor forest produce have been stopped to increase the food sources. Tree planting,

soil conservation Soil conservation is the prevention of loss of the topmost layer of the soil from erosion or prevention of reduced fertility caused by over usage, acidification, salinization or other chemical soil contamination. Slash-and-burn and other uns ...

and water harvesting have been undertaken to improve the habitat. The possibility of an elephant

corridor Corridor or The Corridor may refer to: Arts, entertainment, and media Films * ''The Corridor'' (1968 film), a 1968 Swedish drama film * ''The Corridor'' (1995 film), a 1995 Lithuanian drama film * ''The Corridor'' (2010 film), a 2010 Canadia ...

could be studied by tracking elephants using radio collars.

Accessibility

The sanctuary is 45 km away from

Virudhunagar Virudhunagar is a city and the administrative headquarter of the Virudhunagar district in the Indian state of Tamil Nadu. It is located southwest of the state capital Chennai and south of Madurai. Virudhunagar emerged as an important trade ...

town and about 75–80 km away from

Madurai Madurai ( , also , ) is a major city in the Indian state of Tamil Nadu. It is the cultural capital of Tamil Nadu and the administrative headquarters of Madurai District. As of the 2011 census, it was the third largest Urban agglomeration i ...

city. Srivilliputtur railway station is situated 5 km way from the sanctuary. Forest rest houses are available at Mudungiar, Pudupatti and Mudaliaroothu. There are many private lodges near the sanctuary. There are no roads inside the sanctuary and hence visitors must cover it on foot. Guides are available on request from the sanctuary office to accompany tourists on treks.

References

{{Western Ghats Wildlife sanctuaries in Tamil Nadu 1988 establishments in Tamil Nadu Protected areas established in 1988

Geography

Fauna

Flora

Conservation

Accessibility

See also

References