By the 1980s, they were extirpated in Lancang County, and the remaining animals were split into two populations, viz. in Xishuangbanna–Simao and Cangyuan.
Na década de 1980, foran erradicados do condado de Lancang, e os restantes animais estaban divididos en dúas poboacións, concretamente en Xishuangbanna-Simao e Cangyuan.