The sanctuary surrounds the catchment area of the Idukki Arch Dam, one of the highest arch dams in Asia.
The reservoir covers approximately 33 square kilometers of the sanctuary's total area.
It is a habitat for the Great Indian Hornbill, a bird species indicative of high-quality forest health.
The sanctuary's vegetation includes indigenous species like rosewood, ebony, and teak, alongside medicinal plants.
The Periyar River, which feeds the reservoir, is the primary hydrological feature of the region.
The sanctuary was formally established as a protected area in 1976 to preserve the biodiversity of the highland region.
Idukki Wildlife Sanctuary is a 105-square-kilometer protected area surrounding the Idukki Arch Dam reservoir. The sanctuary is situated in the Western Ghats at an altitude ranging between 450 and 748 meters above sea level. It is characterized by tropical evergreen and deciduous forests which support a diverse ecosystem of flora and fauna. Wildlife inhabitants include elephants, sambar deer, jungle cats, wild dogs, and various species of vipers and cobras. The sanctuary area is primarily accessed via boat rides on the Idukki reservoir, which provide the best vantage points for observing wildlife along the shoreline. It serves as a vital corridor for large mammal movement within the Kerala forest range. The park's terrain is rugged and mountainous, significantly influencing the local microclimate and biodiversity distribution.
From the center of the boat on the Idukki reservoir facing the forest-covered slopes during the golden hour.
Use the boat safari service from the Idukki Dam site to access the sanctuary, as land-based trekking is restricted.
Carry high-quality binoculars as wildlife sightings are often at a significant distance across the water.
Maintain absolute silence during boat tours to increase the probability of spotting drinking elephants.
Apply high-protection insect repellent to guard against leeches and mosquitoes common in the damp forest floor.
Do not attempt to enter the forest core via unauthorized trails, as this is a high-risk area for elephant encounters and illegal.
Operations may be restricted during the peak monsoon season due to high water levels and hazardous terrain.
Strictly no-plastic zone; do not feed wildlife; remain inside the boat at all times; avoid bright-colored clothing.
