author(s)
Djaha André Koffi, Eloi Anderson Bitty, Jean Modeste Kouassi, Daniel Alempijevic, Kate Detwiler and Inza Koné

abstract
The Tanoé-Ehy Swamp Forest is a critical site for the conservation of West African primates. This study aims to understand a behavioral aspect of these monkeys: their tendency to form polyspecific associations. Direct observation is difficult because of high water levels in the swamp, so we used camera traps for this purpose. We set 62 camera traps in the canopy at eight sites for 16 months. Analysis of the recorded videos confirmed the presence of six species of monkeys. Among these species of monkeys, only the olive- Colobus (Pro Colobus verus) showed a significant tendency to associate with heterospecifics. Roloway's monkey (Cercopithecus roloway) also showed a strong association trend, although this trend was not significant. In contrast, few polyspecific associations were detected among the other species. These results may be explained by the absence of non-human predators at this site, but the limited detection zone of the camera traps in relation to group spread must be taken into consideration.