For the first time more than 300 nests of Grizzled Giant Squirrel were sighted by researchers at Pakkamalai Reserve Forests near Gingee (in Eastern Ghats) in Tamil Nadu.

• It is a large tree squirrel in genus Ratufa (Scientific name is ‘Ratufa macroura’).
• It is an agile climber and is almost entirely an arboreal, very rarely coming to ground to escape from predators. It is smallest of all the giant squirrels found in Indian subcontinent,
• In India it is found in patches of riparian forest along Kaveri River and in hill forests of southern states-Karnataka, Tamil Nadu and Kerala. It is also found in Sri Lanka
• It is generally known to nest in foothills of Western Ghats ranging from Chinnar Wildlife sanctuary in Kerala to Anamalai Tiger Reserve and Palani hills in Tamil Nadu and in couple of areas in Eastern Ghats.
• In 1988, The Grizzled Squirrel Wildlife Sanctuary located in Tamil Nadu was established to protect vulnerable grizzled giant squirrel.
• It is characterized by International Union for Conservation of Nature (IUCN) Red List as Near Threatened