Photo taken on March 14, 2021 shows black-necked cranes flying at the national nature reserve for black-necked cranes in Linzhou County of Lhasa, capital of southwest China's Tibet Autonomous Region. About 1,700 black-necked cranes arrive at the national nature reserve for black-necked cranes to spend the winter time every year. (Photo by Xinhua News Agency/Rex Features/Shutterstock)
