The gray slender loris is nocturnal and arboreal.

Description
English: Gray slender loris (Loris lydekkerianus nordicus) from Northern Sri Lanka (Mannar, Trincomalee, Giratele)
Author Dr. K.A.I. Nekaris
Source: https://commons.wikimedia.org/wiki/File:Loris_lydekkerianus_nordicus_003.jpg

The gray slender loris (Loris lydekkerianus) is a species of primate in the family Loridae. It is found in India and Sri Lanka. Its natural habitats are subtropical or tropical dry forests and subtropical or tropical moist lowland forests. It is threatened by habitat loss. The species was previously considered as Loris tardigradus lydekkerianus but Loris tardigradus is now a separate species found in Sri Lanka. This species has been divided into several geographically separated subspecies. Order: Primates, Family: Lorisidae, Genus: Loris, Species: Loris lydekkerianus Cabrera, 1908.