Social Behaviour of the Slender Loris (Loris tardigradus lydekkerianus)

Publication Type:

Journal Articles


Folia Primatologica, Volume 73, Number 4, p.181–196 (2002)



Allogrooming, Intraspecific aggression, Migration, Sleeping groups, slender loris, Social behaviour, Urine-marking, Vocalisations


The social behaviour of the nocturnal prosimian Loris tardigradus lydekkerianus in its natural habitat was studied for 21 months in a scrub jungle in Dindigul, south India. A total of 22,834 scans were collected during 2656 hours of observation on identified and unidentified lorises. Social interactions were observed between individuals of all age-sex classes, both during the night and when the animals met to sleep together at dawn. The majority of aggressive encounters between individuals occurred in territorial and mating contexts. Individuals also communicated with each other through chemical and vocal signals. Adults and sub-adults of both sexes were observed to immigrate into the study area leading to social interactions with resident individuals.


The Copyright belongs to Karger.