%0 Journal Article %A HUO Sheng %A XIANG Zuofu %A XIAO Wen %T Selection of sleeping sites and sleeping trees by black-and-white snub- nosed monkeys (Rhinopithecus bieti) in Honglaxueshan National Nature Reserve,Tibet %D 2011 %R %J ACTA THERIOLOGICA SINICA %P 330-337 %V 31 %N 4 %X Arboreal primates spend about half their lives at sleeping sites; hence, selection of sleeping sites and sleeping trees are crucial for individual survival. We collected data on sleeping sites and sleeping trees for a group of the endangered snub-nosed monkey (Rhinopithecus bieti) at Xiaochangdu, Tibet, from June 2003 to March 2005. Sleeping sites were identified by keeping the monkeys in sight till they fall asleep. Sleeping trees were identified by feces on the ground in the sleeping sites. All sleeping sites were located in the conifer forest, with sunlight, wind shadow, and low altitude in winter. Sleeping trees were taller, larger in diameter at breast height, and had longer bottom branches than did non-sleeping trees. There was no significant difference in the height from the ground to the bottom branch between sleeping trees and non-sleeping trees. These results suggest that predation risk, thermoregulation and/ or climate stresses might be the main determining factors in the selection of sleeping sites for this temperate primate species. %U http://www.mammal.cn/EN/abstract/article_2838.shtml