【BBC地球脉动】沙漠 18

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        Namibia
英式拼写
In one day each of these acrobatic little lizards may catch 50 flies. There are plenty of flies to go round, even with hundreds of lizards competing for them. Away from these rapids flat lizard populations are found in much smaller numbers. But here one unusual abundance has produced another. Deserts are created by the lack of water, but what actually kills animals here is not heat or thirst, but lack of food. So how on earth does a plant-eater this size survive in a place apparently totally devoid of vegetation? Elephants in Namibia are the toughest in Africa. And they need to be. What little food exists is so dispersed that these elephants walk up to 50 miles a day as they travel up the dry river channels searching for something to eat.它们像杂技表演一样，一只小蜥蜴，一天可以吃掉50只蚋蝇，蚋蝇的数量很多，尽管有数百只蜥蜴在捕食，在远离这些湍急水流的地方，扁头蜥的数量要少得多，但是在这里，一个数量众多的物种，带来了另一个物种的大量繁衍，沙漠是因为缺水形成的，但在这里，令动物死亡的不是炎热或干渴，而是缺少食物，那么，如此大型的以植物为食的动物，是如何在这样一个，有植物的地方生存的呢。纳米比亚的大象是所有非洲大象中最能吃苦耐劳的。它们也必须如此，食物如此稀少，它们不得不每天沿着干涸的河道，行走近百公里寻找食物。