Specific research work includes wildlife surveys and inventories, plant phenology, and studies on the basic behavioural ecology and habitat requirements of A. fusciceps rufiventris, as well as studies on other threatened sympatric species, such as the poorly known and little studied in Colombia, mantled howler monkey (Alouatta palliata) and Panamanian night monkey (Aotus zonalis). This work has led to the discovery of new populations of the endangered Colombian black spider monkey (Ateles fusciceps rufiventris), helped to update the international conservation status of the Panamanian night monkey (Aotus zonalis) from data deficient (DD) to near threatened (NT) on the IUCN Red List of Threatened Species, and the first long term population density estimates of Colombia’s pacific primates.