Tigers inhabit only 13 countries -
India,
Bangladesh,
Bhutan,
Nepal,
Myanmar,
Cambodia,
China,
Indonesia,
Lao People's Democratic Republic,
Malaysia,
Russia,
Thailand, and
Vietnam.Only 8 of them have tigers who breed in the wild. India, Nepal, and Russia are the only countries that have increased their tiger population through conservation. Tigers can survive in high mountains, mangroves swamps, tall grasslands, deciduous and evergreen forests. Their coats provide
camouflage. Tigers require a large territory, determined by the availability of prey. It marks territory by urine, feces, rakes, scrapes, and vocalizing. Tigers compete for space with humans. They use landscape features such as dirt roads, trails, foot paths, riverbeds and nullahs which often lead to public sightings.
Landscapes India has five tiger-occupied complexes with unique geographical features.
Shivalik Hills and Gangetic Plains With an average width of 60 km and stretching nearly 900 km from
Yamuna and
Sharda in the west to
Valmiki Tiger Reserve in the east,
Shivalik and the
Gangetic Plains landscapes consist of three parallel geological zones - the Shivaliks, the
bhabar tract and the
terai plains ranging from
Uttarakhand,
Uttar Pradesh to
Bihar. Shivaliks are mountains with elevation up to 1500 m situated between the
Himalayas and Indus-Gangetic-Brahmaputra-Irrawaddy plains. Streams from Shivalik enter underground in the
bhabhar region and re-emerge in the
terai zone, marked by annual flooding, high water table, shifting floodplains, swampy areas, and abundant tall grass species. India and
Nepal share the forests in the
terai region.
Bhutan is a significant part of this zone. This requires trans-national co-operation. The density of tiger population (up to 15 tigers per 100 km2.) there is attributed to the more than 15,000 km2 forested area with ample prey, such as: •
Cervids -
Kaakad (
Muntiacus muntjak),
Chital (
Axis axis),
Hog Deer (
Axis porcinus),
Sambar (
Rusa unicolor) and the
Barasingha (
Rucervus duvaucelii) •
Bovids -
Blackbuck (
Antilope cervicapra),
Chousingha (
Tetracerus quadricornis),
Gaur (
Bos gaurus),
Goral (
Naemorhedus goral),
Serow (
Capricornis thar) and
Nilgai (
Boselaphus tragocamelus) •
Other Mammals -
One-horned Rhinoceros (
Rhinoceros unicornis) and
Wild Boar (
Sus scrofa)
Central India and Eastern Ghats The
Central Indian and
Eastern Ghats landscape includes all the area from semi-arid zone of
Rajasthan, central Indian plateau of
Madhya Pradesh,
Chhattisgarh,
Jharkhand,
Maharashtra (along with part of
Sahyadris), and
Odisha to parts of the Eastern Ghats in
Andhra Pradesh,
Telangana, and Odisha. A step-like geological formation can be seen at
Chhota Nagpur Plateau (consisting of Hazaribagh, Ranchi and Koderma plateaus) along with the hills of
Aravalli,
Satpura and those in Eastern Ghats which range from 200 m to 1300 m. This terrain with patches of shallow, infertile soils is a natural deterrent for extensive cultivation, leaving many areas in this landscape forested. However, the traditional connection between ancient forests in Eastern Ghats with primitive forests of Central India along the Chhota Nagpur plateau is near extinction. A network of Protected Areas with nearly half of the total Tiger Reserves of India occupies this landscape. Peninsular forests transition into
Thar desert through a semi-arid region located between northwestern Madhya Pradesh and Eastern Rajasthan. This habitat supports high
biodiversity and tiger abundance. The landscape is undergoing massive degradation due to
mining, infrastructure development and
insurgency. Wildlife habitats there are the most fragmented in India. With four tiger populations of more than 100 members each (
Kanha-
Pench Block hosts more than 300) this landscape is home to
endemic species such as
Indian Wild Buffalo (
Bubalus arnee) and Hard Ground
Barasingha (
Rucervus duvacelli branderi). Other common prey animals there are
Blackbuck (
Antilope cervicapra),
Barking deer (
Muntiacus muntjak),
Chinkara (
Gazella benetti),
Chital (
Axis axis),
Chowsingha (
Tetracerus quadricornis),
Gaur (
Bos gaurus),
Mouse Deer (
Moschiola indica),
Nilgai (
Boselaphus tragocamelus),
Sambar (
Rusa unicolor), Wild Pig (
Sus scrofa).
The Western Ghats Stretching from the
River Tapi in North, running parallel to the
Arabian Sea coast across over 1600 km to
Kanyakumari in South, the
Western Ghats landscape ranges from
Goa,
Karnataka and
Kerala to
Tamil Nadu. Total forest cover is about 1,01,467 km2. This landscape had 11 official tiger reserves as of 2018. The highest peak at Anaimudi is 2,695 m from sea level. It is a
biodiversity hotspot with vegetation ranging from
grasslands,
montane stunted evergreen forests (
shola), tropical wet evergreen forests, moist deciduous to dry deciduous forests and dry thorn forests, is home to about 5,800 species of flowering plants, 500 species of birds and 120 species of mammals with a large number of them being endemic to this region. Illegal
quarrying,
mining,
hydroelectric power projects,
deforestation for
timber and
agricultural output with rampant
monoculture, hunting and encroachment have resulted in irreversible habitat loss, and disruption of habitat corridors, thereby interrupting the
gene flow in tiger populations. It was estimated (2018) that in Karnataka, hosting India's second highest tiger population of 524 (SE 475 - 573), about 12% of forests have been destroyed since 2000.
North Eastern Hills and Brahmaputra Flood Plains North Bengal Dooars,
Brahmaputra Flood Plains and
North Eastern Hill ranges together constitutes North Eastern Hills and Brahmaputra Flood Plains landscape which includes parts of Northern
West Bengal,
Assam,
Arunachal Pradesh,
Mizoram and
Nagaland. The fertile plains of Bengal Dooars are in the foothills of eastern Himalayas and have tropical moist forests that extend into the
Brahmaputra Valley covering 750 km by 80 km, surrounded by hilly terrain. This region has numerous protected areas, reserved forests and wetlands along the
Brahmaputra River. The northeastern hill region consists of eastern Himalayas extending from the Koshi Valley in Central Nepal to northwest
Yunan in China and include northeast India along with the hill districts of West Bengal.
Garo,
Khasi and
Jaintia hills form the
Meghalaya plateau, while in the southeast, Mizoram includes part of
Lushai hills while Tripura has a small chunk. The India-Myanmar border is along the
Naga hills, while Assam is home for the
Barail Range, Karbi-Anglong hills and Cachar hills. With fertile land, many
rivers and
tributaries, the mountains, valleys and plains range from 300 m to 6000 m in altitude.
Tropical climate is predominant in valleys and deforestation for agriculture threatens the survival of many
endemic species there. Apart from common tiger prey, tigers hunt
Himalayan Goral (
Naemorhedus goral),
Himalayan Serow (
Capricornis thar),
Red Goral (
Naemorhedus baileyi),
Bharal (
Pseudois nayaur),
Brow-Antlered Deer (
Cervus eldi eldi),
Leaf Deer (
Muntiacus putaoensis),
Pygmy Hog (
Porcula salvania),
Ibex (
Capra ibex),
Great Tibetan Sheep (
Ovis ammon hodgsoni) and
Tibetan Wild Ass (
Equus hemionus kiang). Tigers also hunt
Badgers (
Arctonyx collaris),
Otters (
Lutrogale perspicillata) and sometimes baby
Elephants (
Elephas maximus) and one-horned Rhinoceros (
Rhinoceros unicornis). Including two Tiger Conservation Units (TCUs), nine tiger reserves there are part of the forest area of around 1,70,541 km2. The Tibet Autonomous region of China, Bhutan, Nepal, Bangladesh and Myanmar share borders with this landscape, requiring international cooperation.
Sundarban Sundarban consists of
mangrove forests in the southern part of West Bengal and extends into Bangladesh. This wetland is a global priority Tiger Conservation Landscape Unit covering more than 10,000 km2. It was declared a
World Heritage Site by
UNESCO in 1987. Designated Sundarban Biosphere Reserve with 4,266 km2 area on the Indian side (34%) is under the highest protection for wildlife in comparison with Sundarban in Bangladesh (66%), where a majority of the area allows harvesting
forest produce. Aquatic systems of the mangrove habitat are productive, hosting 3.6 tigers per 100 km2,. They have adapted to a more saline and
pneumatophore-filled existence. This region has many man-eaters. Chital (
Axis axis), Wild Pig,
Rhesus macaque (
Macaca mulatta) and
Lesser adjutant stork (
Leptoptilos javanicus) are the major prey. Fauna such as
Water monitor (
Varanus salvator), young
Saltwater crocodiles (
Crocodylus porosus) and possibly
fish are other prey. With rivers serving as natural barriers, tigers swimming across the water channels up to 400 m wide have been recorded. An isolated habitat restricts the gene flow for tigers. ==Population==