The Meghamalai reserve forest, also contiguous with Periyar, is proposed to be the 600 km² Meghamalai Wildlife Sanctuary to protect several threatened species including: Bengal Tiger, Indian Elephant, Nilgiri tahr, lion-tailed macaque, Slender loris, Grizzled Giant Squirrel, Salim Ali's fruit bat, Great Indian Hornbill, Hutton's pitviper and Vindhyan Bob butterfly.