Similar footprint-recognition software has been used to create biometric signatures for white rhinos, polar bears, and cheetahs as well.
类似的足迹识别软件已经被用于为白犀牛、北极熊以及印度豹制作生物签名。In the wild, southern white rhinos have suffered devastating hits to their population thanks to a recent surge in poaching.
由于近期非法偷猎的猖獗，野生白犀牛的数量已在锐减。An international agreement on protecting endangered animals and plants provides for sport hunting of white rhinos in Africa.
一份同意保护濒危动植物的国际协定为非洲提供狩猎白犀牛。But Dr Bouts explains that the zoo is keen to boost numbers of this species.
但是动物园方面却热切希望增加白犀牛这一物种的数量。The pieces come from four of the five types of rhino: white, black, Indian and Sumatran.
这四块粪便产自四种不同的犀牛，分别是白犀牛、黑犀牛、印度犀牛和苏门答腊犀牛。AndAn international agreement on protectingendageredendangered animals and plants provides for sport hunting of white rhinos in Africa.
一项关于保护濒危动植物的国际协议对非洲白犀牛的运动式狩猎进行了规定。These include both white rhinos and black rhinos in the wild in Africa.
包括非洲地区的野生白犀牛和黑犀牛。Yet the chances of saving the northern white are remote.
然而，拯救北白犀牛的几率还是非常低。In the whole of Africa, fewer than 2, 500 black rhinos and around 7, 000 white ones managed to survive.
在整个非洲大陆，仅有不到2500头的黑犀牛与约7000头的白犀牛能生存下来。