supported by the project of NSFC(No.30970442,31200294);Foundation of Key Laboratory of Southwest China Wildlife Resources Conservation,Ministry of Education;funded by grants to Cyril C.Grueter from the following institutions:Janggen-Pöhn-Stiftung;A.H.Schultz Stiftung;Zürcher Tierschutz;Zoological Society of San Diego;Offield Family Foundation;Amerman Foundation;Primate Conservation;G.and A.Claraz-Schenkung;Goethe-Stiftung;Jane Goodall Institute Schweiz;Primate Action Fund of Conservation International.
Sleeping site locations are important to free-ranging primate groups.Sites are strategically selected by primates so as to optimize security,comfort and foraging efficiency.Data were collected on the distribution of s...