ABSTRACT
Despite being considered one of the most endangered primates in the world, knowledge about the distribution and population status of the brown spider monkey (Ateles hybridus) is scarce. This work compiles the information that has been obtained on brown spider monkeys in Colombia for the last few years in a document that contains the current state of knowledge of their distribution and that of some of their studied populations. Based on recent records (2010 -2020) we generated a habitat prediction model for Ateles hybridus in Colombia and contrasted it with: historical data, natural protected areas and a habitat loss analysis. Information from population census studies was collected and we discussed some of its most relevant results. In 2010, only 22% of the historical range contained available habitat for the species. The deforestation rate in the last 20 years was more than 27%, suggesting that the process of habitat loss and fragmentation is prevalent. We identified eight priority areas for their conservation in Colombia and the need to create new protected areas, since only 3% of their distribution is legally protected. Finally, we identified that the highest densities of the studied populations are not necessarily the ones in the best condition, since they are restricted to small fragments of forest, usually isolated. The situation of Ateles hybridus populations is critical and coordinated and immediate efforts are required to prevent their prompt extinction.
