This site covers a number of African primates and deals with them on their home grounds. You will also find audio of primate vocalizations. The Argentine Forensic Anthropology Team is an organization conducting research on a global scale. Read about projects in Argentina, Bosnia, Peru, the United States, and many other locations. Your language choices are English and Spanish.
Authors frequently refer to gene-based selection in biological evolution.
Here you can read a general account of such 'selection' and how it all comes together. Not only will you learn about this remarkable species of ape, but you will find excellent links to other primate anthropology sources. This target article presents a plausible evolutionary scenario for the emergence of the neural preconditions for language in the hominid lineage. The Budongo Forest Project Website detailing the study of primates in western Uganda. You will read a brief report which has a large bibliography.