Zhang Zhengwang, a professor from Beijing Normal University and a member on China's 35th research mission in Antarctica, monitors on snow petrels near the Zhongshan Station, a Chinese research base in Antarctica, on Feb. 11, 2019. Chinese researchers have begun using infrared cameras to monitor Antarctica's snow petrel, a key indicator species of the local marine ecosystem. This is the first time Chinese researchers in Antarctica have used infrared cameras in bird monitoring. (Xinhua/Liu Shiping)