Social encounters in two prosimian species: Galago crassicaudatus and Nycticebus coucang
Social encounters between all possible pairings of seven thick-tailed galagos (Galago crassicaudatus) and eight slow lorises (Nycticebus coucang) were observed in an observation cage. Neither species used facial displays or vocalization during the encounters. Both species possess special urination behaviors, but these patterns were not used extensively during the encounters. Reciprocal allogrooming and olfactory investigation were prominant behaviors displayed by both species. Agonsitic behavior was seen much more frequently in galagos than in lorises. Responses of a particular animal to others differed in type of behavior displayed and in the duration and intensity of the behavior; thus, individual recognition of specific species members is possible for both species.