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In order to increase our understanding of forest elephant (Loxodonta cyclotis) vocal communication, this study examined the spatial and temporal activity of elephants from two forest clearings (Bissoloko and Madjouama). To obtain data on the visit of elephant in the clearings daily, it requires considerable human and financial resources for conservation programs observations. However, we deployed autonomous acoustic recorders “SM2” to assess elephants’ activities both day and night time from 2013 to 2014. Elephant visitation in these clearings depends on certain factors as, seasons, years, and preferences of elephant to use one or more site. As a results this study found that (i) elephants visited Bissoloko clearing more than Madjouama, although these two clearings were within 5 km distant one another; (ii) Eighty six per cent of elephant calls occurred at night, and large changes in call density at night often were not reflected in similar changes during the day; (iii) there were significant differences in the calls made at night; (iv) elephants were found to be visiting clearings more often in the wet season than in the dry season; (v) visitation was significantly higher in 2013 than in 2014. Elephants used randomly one or other clearings. This empirical study suggests that African forest elephant has two vocal communication practices. Spatially separated females engage in rumble exchanges that help them to coordinate their movements and to bring them together. Both male and female elephants produce "mate attraction" rumbles to inform the opposite sex of their reproductive status. These results show the value of acoustic monitoring as a tool for better understanding of forest elephant behaviour. We suggest that passive acoustic monitoring should be incorporated into forest elephant monitoring programs to complement direct observations at forest clearings.

Activity of Forest Elephant (Loxodonta cyclotis) In Two Clearings within Ogooué Leketi National Park, Congo Brazzaville