In 2010 Proyecto Mono Tocón confirmed the presence of a group of approximately 30 individuals of the bald uakari (Cacajao calvus ssp) in the Cordillera Cahuapanas. This finding was the result of a preliminary study on the species, funded by the French conservation organisations CEPA (Conservation of Species and Animal Populations) and Le Conservatoire pour la Protection des Primates, with a large contribution of La Boissière du Doré Zoo.
The discovery of this new population of uakaris in the mountains of San Martin, at 365 Km distance from their formerly known habitat between the Ucayali and Yavari rivers, generates new questions on the origin of this rare population. Nothing is known about the connection of this population with that of eastern Peru, about their diet or about the behaviour of this “mountain uakari”.
This species was known to inhabit especially flooded forests and to have a preference for the fruits of the Moriche palm (Mauritia flexuosa) as food source, but is now known to live also in montane forest at an altitude between 1100 m and 1500 m with vegetation that is completely different from that in his originally known habitat below 700 m.
With these insights a new study will be initiated to collect more important data on the distribution and threats of this new population of uakaris discovered in San Martin. This study is again funded by the French conservation organisations CEPA and Le Conservatoire pour la Protection des Primates, the La Boissière du Doré Zoo and with extra help from the German organisation ZGAP (Zoological Society for the Conservation of Species and Populations).
Please have a look at the journal of the CEPA (in French) for more details about the first study of the Cacajao Program.