Chinnar: The Rain-Shadow Scrub & Grizzled Giant Squirrel Haven

Biogeographical Wonder: The Rain-Shadow Flank of the Western Ghats

Located approximately 60 kilometers north of Munnar along the state border between Kerala and Tamil Nadu, the Chinnar Wildlife Sanctuary encompasses 90.44 square kilometers of extraordinary terrain. While the western slopes of the Anamalai and High Ranges receive over 4,000 millimeters of deluge during the southwest monsoon, Chinnar lies squarely in the rain shadow of the towering Anamudi massif, receiving less than 1,000 millimeters of annual precipitation.

This dramatic climatic difference creates a landscape unlike anywhere else in Kerala. Instead of dripping shola moss and emerald tea gardens, Chinnar presents a fascinating expanse of dry deciduous forests, thorny scrublands, xerophytic vegetation, and riparian riverine woods. Sculpted rocky hills and rugged granite gorges rise from 400 meters in the river valleys to over 2,144 meters at the majestic peak of Kottakombu.

The sanctuary forms a crucial continuous ecological corridor linking the Eravikulam National Park and Anamudi Shola National Park in Kerala with the Indira Gandhi Wildlife Sanctuary (Anamalai Tiger Reserve) in Tamil Nadu, facilitating the unhindered seasonal migration of large herbivores and carnivores across state lines.

Sanctuary Wildlife: Grizzled Giant Squirrels, Star Tortoises and Leopards

Chinnar is an ecological sanctuary of immense biodiversity value. Its most famous inhabitant is the endangered Grizzled Giant Squirrel, distinguished by its grizzled grey-brown fur, white belly, and long, bushy tail. Visitors walking silently along the riparian fringe of the Chinnar and Pambar rivers can often spot these agile canopy dwellers leaping between the branches of mature tamarind, jamun, and mango trees.

The sanctuary is also the only place in Kerala where the Indian Star Tortoise (Geochelone elegans) is found in its natural habitat, thriving among the dry thorny shrubs and rocky outcrops. Chinnar also boasts a healthy population of the vulnerable mugger crocodile basking along the riverbanks, as well as the endangered Albino Gaur (white bison), which has been photographed roaming these dry deciduous hills.

Large predators are well-represented, with regular sightings of Indian leopards, wild dogs (dhole), and spotted hyenas, alongside a vibrant herbivore community comprising gaur, sambar, chital, barking deer, and large herds of wild elephants. Over 225 bird species and 150 butterfly species—including the rare yellow-throated bulbul—further enrich this unique ecosystem.

River Expeditions: The Spectacular Thoovanam Waterfalls Trek

One of the premier adventure highlights of Chinnar is the guided trek to the spectacular Thoovanam Waterfalls, formed where the sacred Pambar River cascades over a sheer 84-foot granite precipice into a deep, turquoise plunge pool. Originating near Anamudi, the Pambar is one of only three east-flowing rivers in Kerala, ultimately joining the Amaravathi River in Tamil Nadu.

The 3-kilometer trek begins from the Alampetty forest checkpost along the Munnar–Udumalpet highway. Accompanied by trained Muthuvan tribal eco-guides, trekkers navigate rugged dirt trails flanked by dry deciduous teak, thorny acacia, and aromatic lemongrass. Along the way, guides point out ancient animal tracks, medicinal herbs, and resting birds.

Reaching the waterfall viewpoint rewards hikers with a breathtaking spectacle of white foamy water crashing against dark granite boulders amidst a lush green riverine microclimate. The thunderous roar of the falls reverberates through the canyon, providing a dramatic contrast to the sun-baked arid scrubland surrounding the gorge.

Ancient Foundations: Megalithic Muniyaras and Indigenous Stewardship

Chinnar is not only a wildlife paradise but also an archaeological treasure trove. Scattered across the rocky hillslopes are prehistoric Megalithic dolmens and cist burials, known locally as 'Muniyaras'. Constructed between 1000 BCE and 500 CE, these ancient stone chambers were erected by Iron Age hunter-gatherers using four vertical granite slabs capped by a massive horizontal stone table.

The sanctuary is also home to eleven indigenous tribal settlements belonging to the Muthuvan and Hill Pulaya communities. For centuries, these forest tribes lived in harmonious coexistence with the wildlife, practicing traditional slash-and-burn millets cultivation and sustainable honey gathering.

Today, under the Participatory Forest Management (PFM) initiative, tribal community members serve as primary conservation partners. They operate eco-tourism activities, staff watchtowers, guide wilderness treks, manage treehouse accommodations, and run anti-poaching squads, transforming traditional forest wisdom into powerful modern conservation tools.

Transit Log, Entry Permits and Travel Protocols

Chinnar Wildlife Sanctuary is located along the Munnar–Udumalpet interstate highway (SH 17), approximately 60 kilometers north of Munnar and 65 kilometers south of Pollachi in Tamil Nadu. The nearest rail hubs are Pollachi (65 km), Aluva (130 km), and Ernakulam (145 km), while Coimbatore International Airport (CJB, 105 km) offers the most convenient air link.

The Forest Department's Eco-Tourism Centre at Karimutti serves as the administrative base for permits, guided trekking bookings, and treehouse reservations. Popular activities include the Thoovanam Falls trek, Chinnar river walk, nature trails to prehistoric rock art sites, and night stays at the thrilling Vasyappara or Machan treehouses perched high above the scrub canopy.

Visitors must carry sun protection, binoculars, sturdy hiking boots, and drinking water. Due to extreme fire danger during the dry months, carrying lighters, matches, or smoking is strictly banned inside the sanctuary.

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