In 2018, Han Xue-song, then a researcher with the Beijing-based Shan Shui Conservation Center, was in the Sanjiangyuan region on the Qinghai-Tibet Plateau, surveying black-necked cranes (Grus nigricollis). At an elevation of more than 4000 meters (13,000 feet), this is a windswept land of alpine meadows and rolling hills that stretch as far as the […]