Acknowledgments
We thank Camilo Flores Amasifuén, Migdonio Huanuiri Arirama, Ney Shahuano Tello, Mathieu Maréchal, Sarah Walker, and all other field assistants without whom the field work would not have been possible. We also thank Christiane Schwarz for her excellent work in the genetics laboratory.
This work was conducted under all necessary permissions and ethical guidelines from the relevant authorities of Peru (research permit no. 249-2017-SERFOR/DGGSPFFS from the Servicio Nacional Forestal y de Fauna Silvestre of the Peruvian Ministry of Agriculture) and the German Primate Center.
The research was funded by German Primate Center, Leakey Foundation, German Research Foundation (DFG; Project nr. 407493972), International Primatological Society and Primate Action Fund.