Rangers patrol to monitor Tibetan antelopes at the Qiangtang National Nature Reserve in the northern part of southwest China's Xizang Autonomous Region, Dec. 17, 2023. Winter is the mating season for Tibetan antelopes living at the Qiangtang National Nature Reserve. The three-week mating season is the only period of time throughout the year when a male antelope is seen together with the female ones. Dubbed the "paradise of wild animals," Qiangtang National Nature Reserve is home to over 30 kinds of wild animals listed on national-level protection catalogue, including Tibetan antelopes and wild yaks. (Xinhua/Jiang Fan)