Past
and present status of the Indian Tiger in northern West Bengal, India: an
overview
Jayanta
Kumar Mallick
Personal
Assistant to Principal Chief Conservator of Forests, Wildlife & Chief
Wildlife Warden, West Bengal;
Office:
Wildlife Wing, Directorate of Forests, Government of West Bengal, Bikash
Bhawan, North Block, 3rd floor, Salt Lake City, Kolkata, West Bengal
700091, India
Email: jayantamallick2007@rediffmail.com
Date of publication
(online): 26 March 2010
Date of publication
(print): 26 March 2010
ISSN 0974-7907
(online) | 0974-7893 (print)
Editor: L.A.K. Singh
Editor’s
Note:
Corridors and landscapes for tiger and
sympatric species
“The concept of forest corridors, specially conceived for elephant management, could additionally ensure the exchange of genes from adjacent areas so that ……the majestic tiger in tawny and black continues to reign in the forest habitat.” Although written about ten years back in the context of elephant and tiger (Singh 1999: pp. 56), the concept applies for conservation of tiger and its other sympatric species. The present account on tigers of northern West Bengal highlights potentialities for landscape-level management of tiger by encompassing the entire area of Neora-Chapmari-Mahananda-Gorumara, and also through Jaldapara-Buxa. This is expected to benefit elephant and rhinoceros, as well. Landscapes listed in the work edited by Jhala et al. (2008) across ‘North East Hills and Bramhaputra Flood Plains’, particularly the Manas - Ripu Chirang - Buxa/Jaldapara - Gorumara - Singhalila landscape, offer a base for further evaluation and development of management prescriptions for tiger across national and international borders. Trans-boundary prescriptions are assuming increased significance in the light of improving vegetation in and around habitats of isolated tiger populations and increasing information about tigers moving out to newer areas.
Young tigers, after passing
through their cub-hood in the company and guidance of mother tigress, may move
away a lot from the natal area while exploring to reach and establish a
‘territory’ of their own. In the state of Orissa, after gap of ‘several
decades’, tigers have been tracked and seen outside Similipal Tiger Reserve in
Satkosia RF of Karanjia Forest Division in January 2004, and in Kuldiha
Sanctuary in March 2009. These are
viewed as consequences of southward shifting of tigers and confirm to the
observed behaviour of the tiger population in Similipal (Singh 1995; Prusty
& Singh 1996; Srivastava & Singh 1997). Efforts are on for consolidating a corridor through
Similipal-Hadgarh-Kuldiha in this landscape. The present study on northern West Bengal chronicles a few
instances within the study area and elsewhere in India which may appear as
stray movements. There may be more
records elsewhere in the tiger range, which have skipped serious attention and
analysis from managerial view point. Possibly, too much of ‘anthropocentric management activities’, in
whatsoever form, have already reached within most of the “tiger-rich” areas, as
a result of which tiger, as an evolutionary survival strategy, is on a spree of
exploration and evaluation of new homes. The qualified corridors through which
straying tigers move and the habitats still supporting reminiscent isolated
populations of tiger constitute the nuclei for directing and developing
strategies for management of tiger landscapes in future.
References
Jhala, Y.V., R. Gopal & Q. Qureshi
(eds.) (2008). Status of the Tigers, Co-predators and Prey in India, pp.130 and 163.National Tiger Conservation Authority, Govt. of India, New Delhi, and Wildlife
Institute of India, Dehradun. TR 08/001, 164pp.
Prusty, B.C. & L.A.K. Singh (1996).Trend of population of tiger and leopard in Similipal Tiger Reserve: a
conservation concern. Indian Forester 122(10): 865-868.
Singh, L.A.K. (1995). Sex-identification technique and
sex-ratio in tiger: doubts and clarifications. Indian Forester 122(10): 885-894.
Singh, L.A.K. (1999): Born Black: The Melanistic Tiger in India. WWF-India,
New Delhi 1999, viii+66pages.
Srivastava, S.S. & L.A.K. Singh (1997).Future trend of tiger population in Similipal Tiger Reserve. Indian Forester123(10): 902-909.
Manuscript details:
Ms # o2212
Received 22 May 2009
Finally accepted 05 February 2010
Citation: Mallick, J.K. (2010). Past and present status of the Indian Tiger in northern West Bengal, India: an overview. Journal of Threatened Taxa 2(3): 739-952.
Copyright: © Jayanta Kumar Mallick 2010. Creative
Commons Attribution 3.0 Unported License. JoTT allows unrestricted use of this
article in any medium for non-profit purposes, reproduction and distribution by
providing adequate credit to the authors and the source of publication.
Author Details: Jayanta Kumar
Mallick Postgraduated in 1974, joined the Wildlife Wing
(Headquarters) in 1976 and has been working as PA to PCCF, Wildlife, West
Bengal, for the last 33 years. Worked in the
Project of the North-East India Task Force, IUCN/SSC/Elephant Specialist Group
and also as project consultant of the Indian Society for Wildlife Research,
Kolkata. He has been involved in all departmental publications, has
participated in departmental workshops, undertaken a number of studies, is
looking after departmental data bank and has more than fifty published articles
and study reports on wildlife conservation, particularly of mammals.
Acknowledgements: I
am grateful to Mr. Indranil Mitra for providing the G.I.S. maps and Mr. Somnath
Chakraborty for retrieving relevant data. I also express my thanks to those who
provided field information, to name a few – Mr. Sampat Singh Bist,
I.F.S., ex-PCCF, Wildlife, West Bengal; Mr. N.C. Bahuguna, I.F.S., ex-Director,
Sundarban Biosphere Reserve and Mr. Subrata Pal Chowdhury, Technical Assistant
(Wildlife Wing, Headquarters.
Abstract: Changes in the distribution
range and the estimates of Tiger (Panthera tigris) populations in northern West
Bengal from the late 19th century to 2009 were examined in
detail. According to a 2004 census
there were 70 tigers in the region, while a 2008 estimate put the number at
8-12. The tiger survives only in
protected areas of terai and duars extending over about 1000km2 of Buxa, Jaldapara,
Neora Valley and Mahananda, the Panighat and Bamanpokhri Ranges of Kurseong
Division and the Chilapata and Kodalbusty Ranges under Wildlife-III
Division. Tigers became extinct in
Chapramari Sanctuary about a decade back; Gorumara sightings were recorded up
to the 1980s. The species has
already lost about 1000km2 of its historic range in the territorial
forest divisions of Darjeeling, Jalpaiguri, Cooch Behar, Dinajpur and Malda
Districts. The State Forest
Department has undertaken efforts involving regular monitoring, protection
measures and habitat improvements and tigers are now being sighted in areas
where they were absent for years. Resident tigers appear to be expanding their
ranges to new areas, sometimes at higher altitudes as in Neora Valley National
Park and Buxa Tiger Reserve crossing into Bhutan and Sikkim.
Keywords: corridor-development, dispersal, fragmented habitat, northern West Bengal, Panthera tigris, range collapse, new sightings, livestock-depredation, status, threats.
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Introduction
The Indian Tiger, Panthera tigris tigris Linnaeus, 1758 (Carnivora: Felidae), now occupies only 7% of its historic range. It is considered a “conservation-reliant species” consequent upon its “range collapse” and threats of extinction in small fragmented habitats due to extrinsic factors such as pathogens, poaching and natural calamities, and intrinsic factors like demographic stochasticity and genetic deterioration (Maraj & Seidensticker 2006). In northern Bengal tiger population collapse is recorded during the imperial period involving about 1000km2 in the territorial Forest Divisions of Darjeeling district (Darjeeling, Kalimpong, Kurseong) and Jalpaiguri District (Baikunthapur and Jalpaiguri); and in Cooch Behar, Dinajpur and Malda Districts where the species was recorded during the late 19th and early 20th century and became extinct due to excessive anthropogenic pressures (Baker 1886; Campbell 1907; Lambourn 1918; Sengupta 1965, 1969; Burton 1989; Allen et al. 1993). In West Bengal tigers are found in a variety of habitats that range from the hill forests of Neora Valley and Mahananda, teraigrassland of Jaldapara, the dense sal forests of Buxa and the unique Sundarbans mangrove forest (Yadav 2004b). Though the current potential tigerland in northern West Bengal is estimated to be not less than 1000km2 (S.S. Bist, pers. comm.), Jhala et al. (2008) record tiger occupancy over only 596km2 in the protected areas of Buxa, Jaldapara and Gorumara, without considering the habitat of the resident tiger population in Neora Valley National Park and Mahananda Wildlife Sanctuary under Wildlife Circle (north). Estimates of tiger populations in northern West Bengal on the basis of averages computed for the total landscape (including northeast) have been lower. The Wildlife Institute of India has not taken into account tigers below 1.5 years of age, which could have given rise to a lower count. However, Gorumara has been devoid of tigers for the last two decades, in spite of its potential suitability. Now that tigers have become established in two reserve forests of Baikunthapur and Jalpaiguri forest divisions, tiger land has been extended beyond the protected areas in northern West Bengal.
Materials and Methods
Data for this study in northern West Bengal were collected from
three sources: (a) survey of literature for past records of tiger; (b)
information gathered through interviewing people from fringe villages, forest
officials and field staff with previous or present working experience in the
study area; and (c) the records on results of tiger census from 1979 to 2004,
which is based on pugmark tracking. The locations of tigers in particular forest blocks or compartments
during different census operations in the study area are shown in a forest map
of northern West Bengal. The
present forest coverage is shown in parentheses against each area within the
tigerland.
The wandering and secretive nature of tigers make direct sightings
and observation difficult, particularly in dense cover. Thus departmental surveys that provide
data on tiger numbers and locations are mostly based on indirect evidence like
pugmarks, kills, scats, scratch marks, etc., gathered at the time of regular
monitoring and periodical census operations followed by computer analysis.
Study
Area
Data for this
study were collected from the three districts of Darjeeling, Jalpaiguri and
Cooch Behar that constitute northern West Bengal, and also from the adjoining
districts of Dinajpur (24°43’40”-26°23’N & 88°4’-89°21’E) and Malda
(24°41’-25°32’N & 87°48’-88°28’E) which had tigers, historically (Image). The total recorded forest area in
northern West Bengal is 3051km2: 1204km2 in Darjeeling
District, 1790km2 in Jalpaiguri District, and 57km2 in
Cooch Behar District (Working Plans (North) Division 2001). Out of this, the forest cover in the study
area in sub-Himalayan northern West Bengal is about 2,230km2, which
is nearly 28% of the geographical area. About 1,175km2 (53%) of this forest cover is designated as
protected areas (Image 2). The
study area belongs to the bio-geographical zones 2C (Central Himalaya) and 7B
(Lower Gangetic plains) (Rodgers & Panwar 1988).
The
study area is defined on the east by the river Sankosh along the boundary of
state of Assam, on the west by the river Mechi along the international border
with Nepal, on the north with Bhutan and Sikkim on the south with the northern
part of Cooch Behar District.
Its northern limits are hilly or slightly undulating, incorporating or adjacent to the foothills of the Himalaya (Bhabar zone). The area between the Mechi and the Teesta, comprising the forests of Kurseong Division, Mahananda Wildlife Sanctuary and western part of Baikunthapur Division is known as terai. Traditionally, the region between the Teesta and the Sankosh, including eastern part of Baikunthapur, Jalpaiguri, Kalimpong, Wildlife II and III Divisions and Buxa Tiger Reserve, is known as Bengal duars. It is the erstwhile district of Ambari Falakata within the territory of Cooch Behar Raj. In Bengal duars, the reserve forests are mostly fragmented with small isolated human populations and the corridor-linkages between these forest patches are missing in the human-dominated landscape, thereby making them vulnerable (Yadav 1998).
Numerous rivers and rivulets, flowing down from the Himalaya, cut through the study area making a web of water courses. The changes in the river courses during monsoonal floods have induced formation of extensive grassy savannas and riverine succession forest within natural tropical moist forests. The general character of the vegetation ranges from sandy riverbeds with grassy patches, Khair Acacia catechu and Sissoo Dalbergia sissoo on the recent formations, to UdalSterculia villosa, Simul Bombax ceiba and Siris Albizzia lebbeckfurther inland. The grasses grown are Saccharum bengalensis, Saccharum spontaneum, Aristida cyanantha, Neyrandia arundinacea etc. This grassland habitat is preferred by the tigers as it also harbours good prey population. Some forest blocks experience frequent changes in the course of the rivers, natural and man-made fires, etc., and therefore, the characteristics of vegetation also changes. There are areas away from the river courses, above the average low land bearing dry mixed to wet mixed vegetation. Such a vegetation mosaic has also fostered a variety of wild herbivores (prey species) and carnivores (predators).
Dimension
and extension of ‘Tigerland’
The northern tiger habitat in West Bengal is confined mostly to Darjeeling and Jalpaiguri districts (Hooker 1854; Sunder 1889-95; O’Malley 1907; Gruning 1911; Wroughton 1916a, 1916b, 1917a, 1917b; Inglis et al. 1919; Peissel 1966; Ahmad 1981; Kurup 1989; Agrawal et al. 1992; Prasad 2002). Though Cooch Behar District had population of tigers in the long past (Campbell 1907; Nripendra Narayana Bhupa 1908; Narain 1927, quoted by Pocock 1941; Peissel 1966), no record of this top carnivore is available during the post-independence era.
During early 20th century, the tiger was common in the sub-montane terai of Darjeeling District. O’Malley (1907) observes: “The tiger is met with in fairly large numbers in the plains portion of the District, as well as in the lower hills up to the height of 2,000ft (606m); and it is said to have been found, in a few instances, as high as 7,000ft (2,121m). Man-eaters are scarce, and it is probable that in the few cases in which human beings are killed by tigers, they are not killed for the sake of food, as the place is so well stocked with game and cattle that tigers have no need to take to human flesh.”
During the same period, the jungles of Cooch Behar were linked with the terai that extended up to Nepal, and there was an uninterrupted ecological link between Jaldapara and Buxa as well as Buxa and contiguous Assam on the left bank of the Sankosh River. Regarding the conditions of the Cooch Behar Raj forests, Gayatri Devi, the princess of the Cooch Behar Raj, born in 1919, records (Gayatri Devi & Rama Rau 1982) – “This was superb terrain for wild animals, which could travel for hundreds of miles without crossing a single man-made path. All kinds of game abounded within a radius of a few miles from our palace: tiger, rhinoceros, panther, bear, wild buffalo, bison, hog deer, wild boar, and sambar… elephant.”
Since the
last century, the population of tiger and its habitat has got reduced
significantly in the study area. Now the species is reported only from four protected areas, two in
Darjeeling District and two in Jalpaiguri District, and very rarely from other
territorial reserve forests (Anon. 1998; Nandy 2006). These protected areas are as below.
(i) Buxa
Tiger Reserve (Alipurduar, Jalpaiguri) including national park, wildlife
sanctuary (core area) and reserve forests (buffer area), lying between 26030’-26055’N
& 89020’-89055’E;
(ii) Mahananda Wildlife Sanctuary (Darjeeling), lying within the 26055’33’’-26047’54’’N
& 88033’31’’-88023’36’’E; (iii) Jaldapara Wildlife Sanctuary
(Jalpaiguri), situated between 25058”-27045’’N
& 89008’’-89055’’E; and
(iv) Neora
Valley National Park (Kalimpong, Darjeeling), lying within 26052’3’’-2607’35’’N
& 80045’-88055’E.
Except for
Neora Valley National Park, from the left bank of Tista to Khairbari forest
(the island forest patch to the west of Jaldapara) in the east, there is
unlikely to be any tiger at present (Bahuguna & Mallick in press). Two erstwhile tiger-bearing protected
areas - Gorumara National Park Park, situated between latitudes 26047’12.5”-26043’25.6”N & 88047’7.3’’-88052’4.2’’E and Chapramari Wildlife
Sanctuary, located between 26054’50.6’’-26053’02.31”N
& 88049’33.62”-88052’01.81’’E, have lost the small
tiger population decades ago, as ascertained from management plans. It appears that, changes in habitat
characteristics and other anthropogenic disturbances are forcing the resident
tigers to leave their traditional ranges and search for new grounds in the
vicinity, sometimes at higher altitudes as in Neora Valley National Park and
Buxa Tiger Reserve crossing into Bhutan and Sikkim (Bahuguna & Mallick in
press).
Out of the two new sites, Nathua forest block is under Jalpaiguri Forest Division, situated on the eastern side of Gorumara National Park. It is a flat and almost level land located at an altitude of 104m. The river Jaldhaka flows nearby. The natural crop is composed of riverine forests, mostly Simul-Siris type. There are some patches containing chiefly ‘kashia’, thatch grass and ‘dhadda’ Saccharum longisetosum. There are also some plantation areas. The nearest tiger habitat is Neora Valley National Park on the northwest.
Another territorial forest block recently occupied by the tiger after decades is Gourikone under Baikunthapur Forest Division. A turnaround of the forest cover here has started 10 years ago with the stepping up of conservation activities. New forests came up at some places. The grass is the first seral stage of vegetation succession found in the Tista riverbed. The main grasses found here are Phragmitis karka and Saccharum munja. This grassy expanse of the Laltong Block of Mahananda Wildlife Sanctuary on the right bank of the river Tista links up Apalchand forest biotope under Baikunthapur and helps bringing back the Barking Deer Muntiacus muntjak and Spotted Deer Axis axis. It is assumed that the tiger has returned here following the deer-trail.
Local
extinction and present distribution pattern
1.
Darjeeling District
Tigers, known to be very fond of baby elephants, seem to follow
elephant herds. Dutt-Mazumdar
(1955) noticed tiger pugmarks in the Darjeeling Hills on the elephant tracks at
elevations up to about 8,000ft (2,438m).
1.1. Past records
Wildlife Division-I (277.34km2):
Singalila National Park including Kalpokhri (78.60km2):
As reported in the management plan, formerly, tigers were sometimes sighted at an
altitude of 3,200m in Singalila, lying between 27°13’15’’-22°1’46’’N
& 83°1’91’’-38°7’54’’E. The record of tiger at an altitude of
3186m in Kalpokhri (26.41km2), known as the ‘valley of poison’ for
its medicinal resources, is also on record (Baldry 1926).
Gulma Valley (Mahananda Wildlife Sanctuary) (8.88km2): A narrow strip, covered with thatch and other grasses, is found along the Gulma khola and Choklong khola. Mr. Banerjee, Mr. Kar and Mr. Moitra went for shooting on 15 December 1929 into Gulma forest and bagged a tiger measuring 12’ (Anon. 1930).
Darjeeling
Forest Division (178.63km2):
Tonglu(25.08km2): The records of occurrence of tiger in this
division were available up to 1930s. The tiger was reported from the montane temperate forests of Tonglu (27.030N & 88.090E) in the Singalila range, 11km trek from Maneybhanjan (about 27km from
Darjeeling) by Baldry (1926). Wood
(1937) also reported presence of tiger at Tonglu forests. But, thereafter, no other record is
available regarding occurrence of tiger in the westernmost forests of
Darjeeling District.
Tista
Valley (21.40km2): In the past, the forest tract in the Tista
River valley was a favourite habitat of the tigers. They were sometimes reported from this range. They used to migrate either from the
forests of Sikkim by crossing the gentler Rangit River, which meets with the
turbulent Tista in this valley, dividing Sikkim and northern West Bengal, or
from Kalimpong forests, after crossing the Tista River (Yadav 2004a). Since those areas were converted into
agricultural fields long ago, the tigers living there did not survive in such
conditions.
Kurseong Forest Division (164.27km2):
Lohargarh (6.92km2) and
Bamanpokhri including Balason, Lamagumba and Pankhabari (20.33km2): Hooker
(1854) recorded very few tigers left in Pankhabari (26°50’N & 88°16’E)
forests of upper Bamanpokhri (1.60km2), causing depredation on the
grazing stock of domestic cattle. The tigers were also reported from Lohargarh forests under Panighata
Range (beyond the Bengdubi Military Station) next to Bamanpokhri Range and
Mahananda Wildlife Sanctuary. One
person was killed and another mauled by the tiger in 1987 at Marianbari Tea
Estate near Balasan riverine forests (3.37km2) under Bamanpokhri
Range, as recorded by Mr. N.S. Rai in Bamanpokhri Rest House register (Bahuguna
& Mallick in press). In 2000 tiger census,
an adult male tiger, which was known to frequent the Koklong Forest Block of
Mahananda Wildlife Sanctuary and contiguous Lamagumba Forest Block (2.04km2)
of Kurseong Forest Division during 1999 census, was not found (Anon. 2001).
Neora Valley National Park (88km2): This park was notified in December 1992. Prior to that, until 1988, only one or two tigers were found straying into the high forests of Neora Valley from the reserve forests in the foothills on the south. Shri P.K. Das (retired IFS) first records tiger pugmarks during a trekking trip in late 1980s. During late 1990s, the tigers have established a new home in the pristine forests of Neora Valley National Park (Yadav 2004b). It is anticipated that the tigers inhabiting the southern forests in the foothills preferred to move northward to the dense cover of bamboo and oak forests at Neora in search of a comparatively undisturbed and safe niche with plenty of ungulate prey species and 18 numbers of tiger were recorded from this Park during post-1998 period (Sanyal 2006).
Biswas et al. (1999) also record tigers in Thosum, East and West Nar forest blocks. During February-March, the movement of tigers along the river Neora up to an altitude of 2300m in Rechila Block is reported in the 9thWorking Plan of Kalimpong Division (1997-98 to 2017-18). Yadav (2001, 2004a) records at least 10 tigers in the virgin and undisturbed Hemlock and Laural forests up to 2,438m and tracks to be seen at East Nar (21.43km2), West Nar (20.43 km2) including Panchpokhri and Rechila (27.13 km2). A Himalayan Tahr was reportedly killed by a tiger at about 2,727m altitude in 2002, where the forest is so dense that it is impossible even for a rabbit to penetrate the bamboo patches (Bahuguna & Mallick in press).
In 2004, the presence of tigers (n=20)
was recorded from East Nar (5: 3 adult males, 1 adult female and 1 cub),
Rachila (11: 3 adult males and 8 adult females), Rhenok (1 adult female) and
Thosum (4: 1 adult male, 2 adult females and 1 cub) forest blocks.
During the tiger census 2008, evidences
of tigers were found at Reshit and Rachila in Upper Neora as well as Thosum and
East Nar of Lower Neora. The exact
number of tigers is not determined at the time of preparation of the
manuscript.
Kalimpong
Forest Division (429km2):
There has been an increase in the number
of tigers in the blocks under Chel Range (Anon. 1971). One forest villager was alleged to have
been killed by a tiger at East Nar under Jaldhaka Range. At present, one or two tigers are
recorded from the forests of this division.
2.
Jalpaiguri District
Tigers were common in Jalpaiguri District during the early 20thcentury (Inglis et al. 1919). A
population is now present only in Buxa Tiger Reserve and Jaldapara Wildlife
Sanctuary (Wildlife Division-III), not in Gorumara National Park and contiguous
Chapamari Wildlife Sanctuary under Wildlife Division-II. Except for Neora Valley National Park
under Wildlife Division-II, from the left bank of Tista to Khairbari forest
(under Baikunthapur, Jalpaiguri and Wildlife III Divisions) in the east, there
is unlikely to be any tiger (Bahuguna & Mallick in press). Mr. Subimal Roy, retired Chief Wildlife
Warden, West Bengal, thinks that this is due to poaching (pers. comm.). Recently, two new habitats have been
added in Jalpaiguri District.
2.1.
Past Records
Cooch
Behar Forest Division (now Wildlife Division-III): Narain (1927)
describes an encounter between a wild buffalo and a pair of tigers in duars along a
riverbed on the borders of Bhutan: “…a magnificent bull buffalo moving along leisurely
with on each side a tiger (probably tiger and tigress). Every now and then one tiger would dash
in to try and get a hold, and the buffalo would merely sweep his horns. The tigers were evidently sparring for
an opening... This went on for about half a mile when suddenly one of the
tigers got too close, and the buffalo immediately ripped it right up with his
horns and the beast died at once. The other tiger bolted and the buffalo carried on unconcernedly”. In 1922, as reported by Victor N.
Narayan, two pure white tigers, a male and a female, about three-quarters
grown, with pink eyes were shot in the former State of Cooch Behar (quoted by
Daniel 2001).
Jaldapara:Ahmad (1981) describes a tiger shooting in Chilapata forests during
1940s.
Jalpaiguri
Forest Division (429km2):
Ramshai(14.89km2): Rowland Ward’s record of the largest tiger,
shot at Ramsai,duars in Bengal, by Colonel Evans Gordon, was 10’7’’ (317cm) before
skinning (Ward 1903). Presence of tiger here is recorded up to 1960s. One man
was killed and another one moulded at Ramshai during 1968-69 (Anon. 1971).
Panjhora(22.54km2): A forest villager was killed by a tiger in
this forest block (Anon. 1971).
Moraghat(47.43km2): In 1999, a tiger was reported in this forest
area. Though Moraghat is not the usual habitat of tiger, it is sometimes used
as an old-age home of the tiger. The old tigers, driven out by young tigers from the neighbouring
forests, take shelter there (Bahuguna & Mallick in press).
Wildlife
Division-II Division:
Gorumara
National Park (79.45km2): No tiger is recorded at present from this
national park. Besides the Great
Indian One-horned Rhinoceros, Gorumara National Park serves as an important
biological corridor for sustaining the population of wild elephants in northern
West Bengal between Tista and Torsa rivers. A large number of Gaur also utilize this park along with
other herbivorous species. In the
past, the tigers used to roam in Gorumara forests and around (Sanyal
2006). Gupta (1958)gave a dreadful account of tiger predation on rhino calf in Gorumara: “About
November, 1951, a cow-rhino with a very small calf was frequently seen. A tiger was after this calf, and one
afternoon in early December… the tiger went for the calf. The cow at once charged the tiger, and
a fearful battle ensued about 300 yards from the platform… the battle was
inconclusive. About three weeks
later I saw the cow-rhino and her small calf again. The calf looked normal, but the cow was emaciated, bore deep
claw marks, on both flanks, and seemed to walk slowly with some
difficulty. In the third week of
January 1952, the second and the concluding round of battle was fought during
the night, and the poor, much weakened rhinoceros was killed together with her
calf… I found the remains of the two animals on the right bank of the Indong, a
little upstream of Gorumara. This
time there were two tigers, and the calf had been completely eaten together
with about a third of the cow.”
Anonymous (1976) records that only one big female tiger is seen in
Gorumara. A pair of young tiger
and tigress frequently used to visit this protected area.
Predation by tigers on rhino cows and calves as a factor in keeping
down the population of rhino is in records, and the incidents were in Gorumara
during 1952 when two (mother and calf) rhinos got killed; outside the sanctuary
one calf got killed in 1968-69; and in Jaldapara during 1981 one calf got
killed (Bist 1994).
Gorumara had its own core population of tiger up to 1980s, which got
decimated subsequently. A couple
of tiger was reported in Gorumara in the past but later there were no direct
sightings or indirect evidences like pugmarks (Pratihar & Chakraborty
1996). The management plan of
Gorumara National Park (2007-08 to 2017-18) also records absence of the tiger
since 1980s. During census
operations in 1992, 1993, 1997 and 1999, no tiger was found in Gorumara (Anon.
2000). Again, during tiger census
in 2002 and 2004, no trace of tiger was available in this park. Hence it was assumed that the tiger is
extinct in Gorumara and its surrounding areas. However, Martin (1996) states that in 1994-95, a female
rhino calf was reportedly killed by the tiger in Gorumara.
Chapramari
Wildlife Sanctuary (9.6031km2)
In spite of existence of a good habitat for
large carnivores, this sanctuary does not have any tiger, which it once
had. Tiger is, however, present in
Neora Valley and Mal Forest Block, to the north and northwest of this
sanctuary. However, there is
possibility of the tiger descending down from Neora Valley National Park,
exploring its new territories amidst the rich potential prey-base of
Chapramari.
Buxa
Forest Division
Known for the organized tiger hunts for the sahibsduring the pre- and post-independence era, tiger population in Buxa is critically low (Ghosh 1998). Hunting statistics of erstwhile Buxa Forest Division, the biggest in north Bengal, show that within a period of 20 years (1930-1950) 150 tigers were killed, whereas 36 tigers were hunted between 1955-56 and 1967-68 due to the restrictions imposed on hunting (Management Plan). Tigers of northern West Bengal nullify the concept of territorialism and owing to heavy concentration per unit area several tigers were shot over one kill in course of few hours (Chaudhuri & Chakrabarti 1979). The visitor’s books of Rydak and Bholka Forest Rest House of Buxa Forest Division testify to scores of tiger having been shot by the Governor’s shooting party in a span of 3-4 days in early and mid-thirties (Chaudhuri & Chakrabarti 1979). In early 1933, the then governor of Bengal, John Anderson, along with the Conservator of Forests, Edward Oswald Shebbeare and a number of other high-ranking officials, stopped for four days at the Rydak inspection bungalow, which was built by the British in 1908 to serve as a hunting and shooting camp. Between February 10 and 13, these hunters shot down two tigers in the nearby Tiamari forest. On the afternoon of the 12th, a tiger killed one Sergeant Adams in the same forest. While Anderson left on the 13th, three police officers - Deputy Inspector General P. Walker, Superintendent of Police E. Holdon and Commissioner Drummond - stayed back for another five days, killing two more tigers just behind the bungalow on the bank of the Dhaowlajhora.
Ahmad (1981), who was the Divisional
Forest Officer of Buxa Division during 1939-42, writes: “The two eastern
ranges, Rydak and Sankos, were particularly suitable for shooting tigers… The tigers frequently moved from one
area to another and could always be put up for the shoot. Rydak was largely a tree forest but
along the bank of the river Rydak on the east there were patches of grassland,
which could be beaten for the tiger. There were cane breaks on the south
interspersed by smaller rivers, which were also good habitats for the
tiger. V.I.P. shoots were mostly
organized in Buxa Division.” A
9’6” (285cm) tiger was shot in this forest (Ahmad 1981).
2.2.
Present Records
Gourikone(9.68km2) under Baikunthapur Forest Division (226.29km2):
It is reported that two Royal Bengal Tigers have been sighted in the duars forests
of northern West Bengal. The
tigers have been sighted by the forest personnel in the Baikunthapur forests
after a gap of 20 years. Carcass
of a cow was detected in the Gourikone forest block
under Belacoba Range and the tiger’s presence in the secluded forest was
subsequently confirmed. Here, the forest areas are dotted with tall grass and inhabited by deer
and other herbivores, providing an ideal habitat for this top predator.
The Conservator of Forests, Northern Circle, observes: “I spotted
the young tiger in January (2009) when I was inspecting the forest along with
the local beat and range officers. The tiger stood on our path, gave us a close look and then moved
away. Initially we thought it was
a big leopard but the black stripes on its body and walking style confirmed it
was a Bengal tiger. The tiger was
about 8’6” (2.6m) long and we have collected its pugmarks. It seems the return of prey animals
like the Barking Deer and the Spotted Deer has lured the tiger back.”
Jalpaiguri
Forest Division, Jalpaiguri (429.km2)
Nathua(21.38km2): Recently, another tiger sighting is recorded
in the Nathua Beat under Nathua Range. The locals have spotted the tiger and the forest workers have collected
its pugmarks. A forest guard saw
the tiger in this forest near the Jaldhaka River on 02 November 2008 from a 50m
distance and the locals spotted the predator near the same spot the next
day. On 06 November, the
Divisional Forest Officer, Jalpaiguri Division, visited the spot and collected
the pugmarks, which were 15.40cm in length, and 14.30cm in breadth, suggesting
that it is an adult male, about 5’ (152cm) long. The tiger is roaming in the forest between the Jaldhaka and
Diana rivers. On 16 March
2009, the Divisional Forest Officer submitted a report to the Conservator of
Forests, Wildlife (North) Circle. Subsequently, a team of forest officials including the Chief Conservator
of Forests, wildlife (North) and the Divisional Forest Officer, Jalpaiguri
Forest Division, visited the Nathua forest to survey the situation. The area between the rivers Diana and
Jaldhaka is now covered with natural grassland, which could further be extended
and developed into an ideal habitat for the tigers. Hence, the forest officials have decided to develop this
riverine grassland. They are also
deploying special vigilance for the security of the endangered predator.
Wildlife-III Division, Cooch Behar (315km2)
Jaldapara
Wildlife Sanctuary (216.51km2):Though Jaldapara is famous for the rhinoceros, it also provides
excellent habitat for the tiger. Both food and cover are adequately available for the large
carnivores. Here, the tigers
prefer open grassland with good water sources, avoiding the dense
savannah. They are concentrated in
parts of Malangi, Jaldapara, Torsa and Chilapata blocks (Management Plan
1997-98 to 2006-07). These blocks
have good natural water sources like Chirakhawa, Sissamara, Buritorsa, Sukta,
Sukti, Malangi, Kalijhora etc.
During the first
enumeration conducted on 21 May 1964 in Jaldapara, more than two tigers were
reported (Das 1966), whereas the number of tiger is reported to be 12 during
the census conducted in the first week of September 1968 (Anonymous 1971). But only one tiger was recorded during
the census on 19 and 20 February 1974 (Anonymous 1976). During 1975 and 1978
the number of tiger in this Sanctuary was shown as four (Management Plan 1997-98
to 2006-07). However, 12 numbers of tigers were reported in 1980. In 1985, only three could be tracked
from the pugmarks. The figures
recorded in subsequent census are seven in 1988, five in 1992, and in 2004 it
was three (two adult males
and one adult female) from Jaldapara forest block (34.51km2),two
adult males in Hasimara forest block (16.42km2) and one adult female
in Barodabri forest block (6.09km2).
A tiger was reportedly poached in
Torsa-1 compartment of T.E.C. Beat in February 1990. The tiger seems to avoid the adult rhinoceros. However, there are periodic instances
of rhino calf being killed by tiger in 1974, 1991 and 1995 in Jaldapara (pers.
comm. S. Roy). One elephant calf
also died due to attack by a tiger in February 1992. Killing of two out of 6 numbers of ‘Gayals’, released among
the wild gaur herd in 1963-64, by tiger is also reported (Anonymous 1969).
Buxa
Tiger Reserve
Buxa Tiger Reserve is the largest chunk of forest in north Bengal and has the second highest tigerpopulation in West Bengal after Sunderbans. Before creation of Buxa Tiger Reserve in 1983, the tiger population in erstwhile Buxa Forest Division was 17 in 1972 and 27 in 1979 (Mallick & Mitra 2002). The entire forest area of Buxa Tiger Reserve, except for a small patch of upper ridges between 1700m to 1800m latitude, is suitable habitat for the tigers. The tiger is distributed over Kumargram, Newlands, Bhutanghat, Phaskhawa, Jainty, Tashigaon, Raimatang, Santrabari, south Rajabhatkhawa, north Rajabhatkhawa, Dima and Nimati blocks as per 1997 tiger census. Chaudhuri & Sarkar (2004) record distribution of the tigers in bhabar area around Jainti and Raimatang. Yadav (2004b) estimated a population of 25-30 individuals in the Sal (Shorea robusta) and riverine forests and even in the hilly terrain. During 2005 sudden decline of the tiger population in Buxa Tiger Reserve to only 4 is anticipated by Sanyal (2006). During 2007 tiger census in Buxa Tiger Reserve evidences of tiger’s existence were found in between Raimatang jhora, Dima, Buxa jhora, Bala, Jayanti, Baje khola and Khururi jhora. Presence of a minimum of 12 tigers (four adult males, six adult females and two cubs) is recorded during this census (Anon. 2008b).
Buxa serves as the critical corridor between the forests of the adjoining Assam and Bhutan. This connection should not be prima facie ruled out (Sanyal 2006). It is apprehended that some of the tigers might have migrated from Buxa to the adjacent higher hills of Bhutan.
Cooch
Behar District: Past records
Patlakhawa
Reserve Forest (16.48km2):
A few tigers were found in the Patlakhawa Game Reserve (erstwhile hunting
ground of the Maharaja of Coochbehar), located just on the northern border with
Jalpaiguri, having ecological boundary with Jaldapara Wildlife Sanctuary
(Chaudhuri 1903; Nripendra Narayana Bhupa 1908; Bhaduri 1966). There were shooting-camps two or three
times a year at one of the two reserves either at Patlakhawa or at Takuamari
(Gayatri Devi & Rama Rau 1982). The Maharajahs only hunted primarily in February-March. On 18 February 1907, the Maharajah and
party killed seven tigers at Saralbhanga river in Kachugoan Division of Assam,
bordering Bhutan. On 16 March 1903
he and his party hunted five tigers on the Jorai nullah at Barobisha under
present Buxa Tiger Reserve, in 12 minutes. In 1902, on two separate occasions, the day’s bag included
four tigers. Between 1871 and
1907, 365 tigers were killed on the domains of the Maharajah (Barclay
1931). The Maharajah of Cooch
Behar showed Robert A. Sterndale one of the skulls being 15” of a young tiger
(Sterndale 1982). In 1890, he shot
a 10’2½” (306.25cm) tiger and a 9’3” (277.5cm) tigress. Long ago, white tigers were reportedly
killed in Cooch Behar (Chaturvedi 1970).
Dinajpur
District (18km2): Past records
Dinajpur has freshwater swamps. Burton (1989) mentions one albino tiger shot at Dinajpur in
early 20th century.
Malda along with contiguous Purnea on the west (Santal Parganas, now in Bihar) was considered to be one of the best localities for tiger shooting in Bengal (Russell 1900). Hinjal (Barringtonia acutangula) is the characteristic species that occurs in the freshwater swampy land (beel), low-lying trough-shaped basins connected with various rivers and tributaries. The undergrowth consists of various grasses like Saccharum arundinaceum and Desmostachya bipinnata, Phragmites karka, etc. However, no record of the tiger in this district is available since the beginning of 20th century.
Tiger census operations are periodically
conducted in northern West Bengal by the forest department. The results are shown in Tables 1 to
5. As per 1999 tiger census, the total
tiger territory in Buxa comes to 343km2 or 45.20% of the total tiger
reserve area and this time tigers are found in six new forest blocks reportedly
not occupied during earlier censuses, whereas presence of tigers in six blocks
recorded earlier was not traced (Mallick & Mitra 2002). Tigers were not found in the forests
along the fringe and dispersal of sub-adult tigers from their natal areas
towards unoccupied habitat was also observed (Mallick & Mitra 2002).
During tiger census in 2007, Buxa Tiger
Reserve had a population range 12-20 occupying about 600km2 forests
and other areas of North Bengal 8-12 (Anon. 2008a). In Wildlife Division-III alone, there were 10 reports of
sighting of tigers, five cases of killing of wild herbivores by tigers and 20
cases of lifting of cattle by tigers during 2007. However, Jhala et al. (2008) show only 8-12 (average 10)
tigers for the whole region, though this report has excluded four known tiger
habitats, viz. Neora Valley National Park, Mahananda Wildlife Sanctuary,
Kurseong Division (Panighata and Bamanpokhri ranges) and Chilapata and
Kodalbusty ranges under Wildlife-III Division of the tiger in the region. A person was reportedly killed on 05
February 2006 by a tiger in Kalabari forest village under Kurseong
Division. In November-December
2007, tiger scats and pugmarks were collected in Buxa Tiger Reserve mainly from
Bhutri, Pana, Adma, Chunabhati, Raimatong, Santrabari, Tashigaon, Tobgaon,
Phaskhawa, Jainti, Panbari, South Rajabhatkhawa, Damanpur, Nimati, Newlands,
Kumargram and Sankos forest blocks, mostly located in the northern part of the
reserve (Bhutia 2005; Anon. 2008b).
Dispersal/Migration
Records
Wherever wild tigers still exist, their
habitat often encompasses national borders, such as the Sundarbans between
India and Bangladesh, and the border between Buxa and Manas Tiger Reserves in
the east and Bhutan in the north. However, tiger migration, which is often reported every year within the
state and across the border, has not so far been monitored or studied. Habitat destruction is forcing the
endangered tigers to seek for new grounds, including high mountains which have
a good prey-base but are not known to be the natural home of the big cats.
A number of cases of movement of tigers
to non-traditional areas have been reported in the country in recent years. (a)
The researchers of the Wildlife Institute of India, while combing the Trishna
Reserve Forest in Tripura for census of Gaur, had seen one tigress and two cubs
on several occasions in May 2005. Tigers have not been seen in this forest earlier since 1976; (b) In
September 2007, experts sighted up to 20 tigers in a hilly tropical rainforest
in Maharashtra, almost three decades after it was thought that poaching had
wiped them out there; (c) Increase in the density of tiger (3-5 tigers per
100 km2) in Rajaji National Park is recorded by Harihat et al.
(2009), probably due to immigrating tigers from the nearby Corbett Tiger
Reserve; (d) In November 2008, pugmarks of an adult tigress and cubs have been
found in Nagra Village in Shahjahanpur, some 250km from Lucknow, Uttar Pradesh,
which has no forest around. The tigers have strayed from the Dudhwa Tiger
Reserve, located in the neighbouring Lakhimpur Kheri District; (e) Pugmarks of
an adult female tiger were reportedly found in April 2009 in the high altitude
Pangolakha, Sikkim, along the Bhutan border.
Similarly, tigers are reported to
migrate in between northern West Bengal, Bhutan and Sikkim. Normally they enter the state from Lava
(2,126m), which is 33km from Kalimpong towards northeastern Sikkim. As reported, tigers have been located
in Baikunthapur Division east of Mahananda Wildlife Sanctuary and Nathua
forests under Nathua Range of Jalpaiguri Division south of Neora Valley
National Park. It is presumed that
the tigers tend to migrate through the corridor along the riverine tract (west-east
or north-south) in the study area.
A biological corridor to maintain the
movement of tiger is reported to exist between Arunachal sub-Himalayan forests,
Assam and Bhutan to Buxa Tiger Reserve in West Bengal (MOEF 2000). Phipsu Wildlife Sanctuary of Bhutan is
situated in the northern boundary of Buxa Tiger Reserve (Management Plan). Considering the continuous distribution
and ranging of wild animals in the Tiger Reserve and in its vicinity, it is
seen that the ecological boundary on the north extends upto approximately 2.0km
within Bhutan across the Indo-Bhutan border along the contiguous forest. The natural saltlick at
Khurul/Kalikhola is also situated beyond this international border. Like the elephants and gaurs, tigers in
Bhutan move from Phibsoo Wildlife Sanctuary to the Manas Tiger Reserve and
three reserved forests of Assam and to Buxa Tiger Reserve and Chilapata Range
of Jaldapara Wildlife Sanctuary of West Bengal (Anon. undated). They might be pioneer explorers and may
have returned to the previous locations.
Threats
The tiger crisis is now reasoned to be
solely anthropogenic (Sanyal 2006; Dinerstein et al. 2007; Reddy 2008). Over the last century, major and rapid
changes took place in the topography of the study area due to expansion of
human habitation, increased agriculture, establishment of tea gardens,
urbanization, fragmented wildlife habitat, added to which were large scale
hunting by the British administrators and Indian royal family members, and
depletion of major prey species and poaching (Ahmad 1981; Nandy 2006).
In northern Bengal, the shooting of
tigers was controlled by three game associations from 1926 to 1958 and the
practice was banned from December 1962. These associations were Darjeeling Shooting and Fishing
Club, Teesta-Torsa Game Association, and Torsa-Sankosh Fishing and Shooting
Association. No rewards, however,
were paid and two tigers were allowed per permit per annum (Bist 1997;
Management Plan 2000; Daniel 2001). In 1991-92, one tiger was poached in Panighata block of Kurseong Forest
Division and another tiger at Laltong-14 in Mahananda Wildlife Sanctuary in
1993-94.
Many of the savannahs and grasslands,
particularly those outside the protected areas, have been converted to valuable
timber species during the colonial period. For example, most of the grasslands by the side of the Rydak
and other rivers in Buxa had been planted with valuable teak trees before this
area was declared as tiger reserve (Sanyal 1992).
Strict fire control measures have also
resulted in invasion of woodland over grasslands. These have caused reduction of the preferred habitat of both
the prey and predator species. In
northern West Bengal, the affected areas are Sankosh, Bholka, Bhutri and
Godamdabri in Buxa Tiger Reserve, Titi and Khairbari in Jaldapara Wildlife
Sanctuary, Gorumara National Park, parts of Baikunthapur and Jalpaiguri
Divisions in Jalpaiguri District, Patlakhawa and Garodhat reserves in Cooch
Behar District.
During the 20th century, estimated loss of the pure and mixed grassland areas was 150-190km2in the protected areas of duars in northern West Bengal (30-40km2in Sankosh-Rydak in Buxa, 70-90km2 in Torsa in Jaldapara and Cooch Behar and 50-60km2 in Jaldhaka-Diana in Gorumara) (Bist 1994). Mineral (dolomite) extraction industries have also threatened the tigers in Buxa Tiger Reserve (Mishra 1998; Rajvanshi 2001).
The first case of tiger-train collision
was reported “recently”. One adult
male tiger, nearly 13 years old, 8’5” (2.6m) in length from nose-tip to
tail-tip, was found dead at Barasoulmari Village near the Dolong Tea Estate in
Falakata on railway track between 94/3 and 94/4 km, P.S. Ghoksadanga,
Coochbehar District. The post
mortem report revealed that the facial bones of the tiger had been smashed due
to the impact of this collision. Moreover, four ribs were discovered to be broken and the lungs were
damaged. The carcass was burnt
later near Shiltorsha in Jaldapara forests. It is anticipated that this victim could have strayed from
the Jaldapara Wildlife Sanctuary into the area about 6km away.
However, unlike the Sundarbans,
man-tiger conflict is not so acute in northern West Bengal. Sometimes the livestock of the
villagers are left to graze freely in the forests and they are prone to tiger
depredation, especially in areas where the prey is scarce and such conflict has
led to retaliatory activities like poisoning of carcasses for eliminating the
predator without realising the importance of prey-predator relationship and the
impact of retaliation in the wild, leading to increasing population of the
ungulates and intensity of crop-raiding by these herbivores.
DISCUSSION
The existence of a minimum core breeding number of adults is
required to start with and sustain even a small population, as was the case in
the successively added and ameliorated area of Kanha in 1970s and 1980s (Panwar
2007). According to Kurup (1980),
standing ungulate crop in a minimum area of 5.18km2 is needed to
sustain one tiger for one year in a sample habitat, and annual biomass increment
of prey species per 2.59km2 of habitat is about 336kg. Based on this, it is estimated that
tiger population would require about 24km2 of habitat per adult
tiger to be stable and viable, using only the food increment and not the food
capital stock. Such area is not
available to the individual tigers in the small protected areas of northern
Bengal. Only Buxa Tiger Reserve is
the exception. Hence biological
corridors may provide opportunities for linking protected areas lying adjacent
to each other across international boundaries, and create habitat linkages for
the tigers (Anon. 2006).
Chapramari and Gorumara have the potential for revival as tiger
habitats. These two areas have a
good population of herbivores like Gaur, Sambar, Chital, Barking Deer, Hog
Deer, Wild Boar, etc. which form an excellent prey-base for prime carnivores
like tiger. Such prey base is also
available in Neora Valley and Mal Forest Block to the north and northwest of
Chapramari, connecting corridors between these blocks, the relevant forests of
Khumani Block of Kalimpong Forest Division and Panjhora, Selka, Sipchu and
Hillajhora forest blocks of Jalpaiguri Forest Division. With increased measures of
conservation, the entire area could help in protecting the rhinoceros and elephant
populations in the context of their habitat and migration, and also open up the
possibility of tiger descending down from Neora Valley National Park exploring
its new territories amidst the rich potential prey-base of Gorumara and
Chapramari.
Again, an area of 30.82km2 of the erstwhile 7th Mile
Range of Baikunthapur Forest Division has been included in Mahananda Wildlife
Sanctuary since August 1996. This
is also considered as a tiger habitat. Dispersal of individuals from this area to the east into the forest
blocks of Baikunthapur is also not unlikely. This corridor may also be developed for the facility of
conservation of the predator and prey species in this tract.
In addition to explorations for developing corridors and managing landscapes,
it is also necessary to augment publicity programs in fringe areas to increase
people’s awareness on the tiger’s ecological and cultural significance and the
benefits of their conservation, notwithstanding their occasional depredation on
the village cattle, for which compensation is being paid. The local Forest Protection Committees
(FPCs) and Ecodevelopment Committees (EDCs) may also be involved in such
programs as well as protection of the wildlife including the tiger and their
habitat in northern West Bengal.
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