I have just received some reports and photographs from the bush so thought I would post a quick update on the progress of our release group. Three months after the release of the Bebi, July and Nko, we have not lost any individuals, the group has remained in the area planned to be their home-range, no major health problems have been noted and the radio tracking equipment is still functioning.

Since the beginning, the three animals have stayed together as a group, with July leading and protecting the others from any potential threats. Indeed, July has been observed chasing red eared monkeys on two occasions, when they entered the same crown as the group. July has also been observed copulating with Bebi on two occasions, although these are certainly more social mounts, given the weak probability of Bebi being receptive.

Nko foraging for insects

So far, the group has remained inside the Core Area, with no single foray into the research area, community forest, or main camp. Using a grid system established inside the forest on the release site, we have been able to measure and assess the size of home-range in addition to the daily travel length. The approximate home-range size is now between 7 and 8 ha, and the daily length range is 750m. The 2 first months were characterized by a smaller home-range size and daily length range (2.5 ha for 350m per day), since the group was located in part of the forest rich in food resources, especially fruits. Since the production of their top 3 food species decreased, and we have been able to discern a noticeable increase in time spent travelling.

Bebe eating fruits

Food provisioning is still carried out, but with a process of progressive decrease in the provided amount. During the two first weeks after the release, we supplied the group with food twice a day, once in the morning and again in the late afternoon. We then decreased the provisioning to once a day, usually in the beginning of the afternoon as we observed that the group could find enough food and fruit on their own. Since the beginning of January 2008 however, food is provided only once every two or three days. This new reduction should allow the group to become more independent, and to reduce human/monkey interactions.

Bebe

The group tend to spend the early morning and end afternoon in the upper stratum of the forest, with more time in the lower layers/on the ground in the middle of the day. They own several sleeping trees they leave in the morning and that constitute central points around which they travel during the day. The Monas often follow the stream close to the release enclosure, walking in the water or on the banks, jumping from roots to trunks and foraging in the water on arthropods. Surprisingly, the largest percentage of time spent foraging is actually on arthropods, with fruits and seeds forming the second main food category.

July and Nko following the stream

We are all delighted that the Monas are doing well and that they have adapted so readily to life in the wild. Working at CERCOPAN can be emotionally draining at times, watching animals that have been poorly treated entering our gates day after day and losing animals that we have worked so hard to save. Nevertheless, watching the footage of our newly wild Mona’s makes everything else we endure worthwhile. Not only does it mark a second chance for Bebi, Nko and July, but it also fills us with hope for all of the other monkeys that we will one day follow them.

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