Better to live with allogenerics than to live alone? The case of single male cercopithecus...

Presents information on a report of the integration of single male crowned guenons (Cercopithecus pogonias) into troops of black colobus (Colobus satanas). Observation of one male Cerocopithecus pogonias in three troops of Colobus satanas; Amount of days the male was observed; Occurrence of interspecific grooming; Detailed information on the integration; Suggestions of the main benefits.