The gray slender loris is a nocturnal primate with large forward-facing eyes and long, slender limbs.
Its back fur ranges from gray to reddish, while the underside is pale. It has no tail, and its limbs are long and slender, with large forward-facing eyes.
In April 2011, researchers and members of the Kani community carried out night observations at Peppara Wildlife Sanctuary in Kerala, southern India. Over five nights they recorded seven sightings of the grey slender loris subspecies, Loris lydekkerianus lydekkerianus. The site, at 158–208 metres elevation, included bamboo, Acacia and eucalyptus vegetation.
The sightings extended the known southern record for the subspecies by about 180 kilometres to the Agasthyamalai Hills. In interviews, Kani respondents said the lorises used trees around 4.5–5.5 metres high and ate tender bamboo leaves and insects. The paper combined these local observations with field records from the sanctuary.
An extinction-risk assessment has not been added yet.
At Peppara Wildlife Sanctuary, the 2011 survey recorded seven sightings and extended the known southern record by about 180 kilometres. The same paper documented a specific incident in which some Kani residents captured an adult male slender loris for visiting wildlife photographers. The authors proposed clear rules for photographing lorises and ethical tourism involving local communities. These details come from the sanctuary case study and its local interviews.