环保人士表示，动物园没有一头武广牛，也没有一个人知道如何将它们圈养。如果这一物种在野外消失，便意味着它们从此灭绝。
Conservationists said that with none in zoos and almost nothing known about how to keep them in captivity, if the species vanish in the wild they will be extinct.
武广牛是一种极度濒危哺乳动物，1992年人们第一次在越南和老挝的山区发现它们的踪迹。 这种动物外形与北非羚羊类似，但与野牛血缘关系最近。
The critically endangered mammal, which is found in the mountains of Vietnam and Laos, was first discovered in 1992.
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