Acknowledgement

We are thankful to Chindu County Government, Yushu Forestry and Grassland Bureau, Administration Bureau of Three-River-Source National Park for supporting this study. We thank “One Yangtze” Project of Huatai Securities (HTSC), and “Gyatong Reserve” Project of China Environmental Protection Foundation & Ant Forest for providing financial support to this study. We gratefully acknowledge local rangers Jihti and Tserdo for their efforts in field investigations. We thank Peiyun Li, Ge Zhao, Xingyu Deng, Yidan Xia, Dapeng Zhu and Tianke Gao for their help in the examination of carcasses. In addition, we are grateful to Sandro Lovari and Lingyun Xiao for improving the manuscript.