Wildlife Regions of India : Indo-Gangetic & Central Highlands

The Indo-Gangetic and Central Highlands region represents the ecological heartland of the Indian subcontinent, functioning as a massive transitional zone between the fertile northern river plains and the ancient, rugged plateau of peninsular India. Geologically dominated by the Vindhya, Satpura, and Maikal mountain ranges, this landscape is characterized by undulating hills, deep ravines, and extensive plateaus. The climate is primarily tropical monsoon, experiencing fiercely hot, arid summers and highly concentrated seasonal rainfall, which dictates the hydrology and ecology of the entire region. This landscape forms the critical watershed for several of India’s most important river systems, including the Narmada, Son, Ken, and Betwa rivers. Vegetation is predominantly tropical dry and moist deciduous forest, famously serving as the major junction where India’s expansive Sal forests of the east meet the Teak-dominated forests of the west. The biodiversity here is globally significant, supporting some of the highest densities of wild tigers on Earth, alongside large assemblages of ungulates, diverse avifauna, and apex predators like the Dhole and Indian Leopard. Ecologically, this region is indispensable for maintaining genetic corridors across the fragmented landscapes of central India. However, the region faces immense and immediate conservation challenges. Escalating anthropogenic pressures from coal and diamond mining, the expansion of linear infrastructure such as highways and railways, large-scale river interlinking projects, and intensive human-wildlife conflict severely threaten ecological continuity. Within this heavily pressured landscape, Biosphere Reserves act as crucial bastions for wildlife recovery and landscape-level conservation. They are vital for mitigating habitat fragmentation, protecting critical watersheds, facilitating species dispersal between isolated protected areas, and fostering coexistence with the historically rooted indigenous Gond and Baiga tribal communities who inhabit these forests.

Achanakmar–Amarkantak Biosphere Reserve

Spanning the border of Madhya Pradesh and Chhattisgarh, the Achanakmar–Amarkantak Biosphere Reserve is nestled within the rugged topography of the Maikal hill range, serving as a critical topographical and ecological bridge between the Satpura and Vindhya systems. With altitudes ranging from 200 to 1,120 meters, the landscape is subjected to a tropical monsoon climate that sustains dense, predominantly moist deciduous forests, acting as the westernmost geographical limit for native Sal (Shorea robusta) forests. The region is hydro-ecologically vital, forming the origin point for the Narmada, Johilla, and Son rivers, which support extensive riparian ecosystems and freshwater biodiversity. This diverse habitat harbours a rich faunal assemblage, featuring flagship mammals such as the Bengal Tiger, Indian Leopard, Gaur, Sloth Bear, and the Hard-ground Barasingha. The avian population is equally rich, notable for populations of the critically endangered White-rumped Vulture and the Malabar Pied Hornbill. Amphibian and reptilian diversity thrives in the undisturbed riparian zones. The reserve is culturally integral to indigenous communities, particularly the Baiga and Gond tribes, who depend on the forest for non-timber forest produce and possess profound ethnobotanical knowledge. Recognized by the UNESCO MAB programme in 2012, the reserve is of immense conservation importance for maintaining central Indian forest contiguity, studying watershed dynamics, and protecting highly threatened endemic flora within a landscape facing substantial developmental pressures.

Landscape Connectivity

The Achanakmar–Amarkantak Biosphere Reserve is a cornerstone of the central Indian tiger landscape, functioning as a vital ecological corridor that prevents the genetic isolation of several critical protected areas. The core of the reserve, the Achanakmar Tiger Reserve in Chhattisgarh, shares crucial, albeit highly threatened, forested linkages with the Kanha Tiger Reserve to the west in Madhya Pradesh. The renowned Kanha-Achanakmar corridor is widely considered one of the most important wildlife conduits in the world for facilitating the dispersal of Bengal Tigers, Leopards, and Dholes. To the east, the landscape maintains broader ecological continuity with the Bandhavgarh Tiger Reserve via fragmented but functional stepping-stone forests. By protecting the headwaters of the Narmada and Son rivers, the biosphere reserve also ensures the hydrological health of downstream habitats. Preserving this connectivity is essential for the long-term genetic viability of central India’s megafauna amidst rapidly expanding agricultural and infrastructural development.

Pachmarhi Biosphere Reserve

Situated in the heart of Madhya Pradesh, the Pachmarhi Biosphere Reserve encompasses the dramatic, undulating terrain of the Satpura Range, characterized by deep ravines, cascading waterfalls, and massive sandstone escarpments. Ranging in elevation from 320 to 1,352 meters at Dhupgarh, the reserve experiences a varied tropical climate that supports a unique convergence of forest types, primarily dry and moist deciduous forests where Teak and Sal trees exceptionally co-occur. This habitat diversity is nourished by the Denwa and Tawa rivers, creating rich riparian zones and expansive reservoirs. Pachmarhi is a sanctuary for central Indian megafauna, harbouring robust populations of Bengal Tiger, Indian Leopard, Gaur, Wild Dog (Dhole), and the regionally endemic Indian Giant Squirrel. The rugged cliffs provide crucial nesting sites for globally threatened raptors, including the Long-billed Vulture. The reserve is also highly valued for its ancient rock shelters and cave paintings, reflecting a continuous human presence spanning millennia, while today it supports indigenous Gond and Korku communities. Inscribed into the UNESCO MAB network in 2009, Pachmarhi is a paramount site for scientific research on central Indian biogeography, a benchmark for managing human-wildlife coexistence, and a critical refugium for endemic ferns and bryophytes that require the microclimates of its deep, shaded gorges.

Landscape Connectivity

The Pachmarhi Biosphere Reserve is a massive contiguous forest block that anchors the wider Satpura landscape, playing an indispensable role in maintaining ecological permeability across central India. Its core consists of the Satpura Tiger Reserve, which is amalgamated from the Satpura National Park, Bori Wildlife Sanctuary, and Pachmarhi Wildlife Sanctuary. This expansive protected network acts as a crucial source population for Bengal Tigers and other large carnivores. More broadly, the Pachmarhi landscape forms the vital northern node of the Satpura-Pench corridor, allowing wildlife to navigate southwards toward the Pench Tiger Reserve on the Maharashtra border. To the west, the landscape maintains historic ecological continuity with the Melghat Tiger Reserve, facilitating landscape-level gene flow for wide-ranging mammals. The region also protects the extensive catchment area of the Tawa Reservoir, securing downstream water provisions and sustaining a complex matrix of riparian habitats crucial for migratory avifauna and large ungulates.

Panna Biosphere Reserve

Located in the Vindhya Hill ranges of northern Madhya Pradesh, the Panna Biosphere Reserve represents one of the most critical and threatened ecosystems in the Central Highlands. Characterized by extensive plateaus, deep gorges, and cascading waterfalls along the Ken River, the landscape sits at an average altitude of roughly 300 to 500 meters. The climate is typified by intense, dry summers and a brief, concentrated monsoon, supporting a transition zone where tropical dry deciduous forests dominated by Teak (Tectona grandis) merge with expansive, arid short-grass savannahs and thorny scrublands. The Ken River, the ecological lifeline of the reserve, supports deep pools that harbor specialized aquatic fauna. Panna is globally renowned for its remarkable conservation success in re-establishing its Bengal Tiger population following local extinction. It also supports substantial numbers of Indian Leopard, Sloth Bear, Nilgai, and Chinkara. Avian diversity is exceptional, with the reserve serving as one of India’s most critical breeding strongholds for multiple critically endangered vulture species. The Ken River sustains significant populations of the vulnerable Mugger Crocodile and the critically endangered Gharial. Officially recognized by UNESCO in 2020, Panna is ecologically vital for conserving the unique biodiversity of the Vindhyan landscape and stands as a globally significant case study in apex predator reintroduction, population recovery, and active wildlife management.

Landscape Connectivity

The Panna Biosphere Reserve serves as the critical northernmost stepping stone for wildlife connectivity in the Central Indian landscape. Its core is formed by the Panna Tiger Reserve, alongside the Gangau Wildlife Sanctuary and the specialized Ken Gharial Wildlife Sanctuary. Ecologically, Panna is crucial for maintaining genetic linkages across the fragmented Vindhyan ranges, relying on a fragile network of multi-use forests and riverine corridors to connect southwards with the Bandhavgarh Tiger Reserve. The Ken River itself acts as a primary linear corridor for aquatic and semi-aquatic species traversing the region. However, this landscape connectivity currently faces severe existential threats from the proposed Ken-Betwa river interlinking project, which is projected to submerge significant portions of the core tiger habitat and sever critical movement corridors. Maintaining and restoring connectivity in the Panna landscape is paramount to preventing the isolation of its recovered tiger population and ensuring the survival of the wider ecosystem.

Regional Summary Table: Indo-Gangetic & Central Highlands