“…Black-necked Crane distribution area in China since 1980, these records of Black-necked Crane population distribution concentrated mainly in the Yunnan-Guizhou plateau, the records of the Black-necked Crane population in Tibet were relatively the rarest (Fang et al, 2020;Lu et al, 2017;Wu et al, 2020). Therefore, counting the number of (1) increase and decrease (Bishop & Li, 2002;Li, 1997;Li & Yang, 2003;Wei et al, 2021;Wu et al, 2019).…”