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As the day warms up, the lizards move away from their cracks
隨著白天氣溫的升高，蜥蜴離開它們藏身的巖縫
and head down to the bottom of the gorge.
奔向峽谷底部
Their goal is the river.
它們的目標(biāo)是這條小河
There is no food at the edge, but this desert river holds a secret.
河邊沒有一點食物，但是這條沙漠河流卻藏著一個秘密。
Each day, black fly rise from turbulent stretches of the river.
每天，成千上萬的蚋從奔騰的河水中羽化
This is what the lizards have come for.
這就是蜥蜴到此的目的
The black fly never land, so the lizards have to leap for their food.
蚋不會降落，所以蜥蜴必須跳起來捕食。
In one day, each of these acrobatic little lizards may catch 50 flies.
每只身懷絕技的小蜥蜴一天能吃掉50多只小蟲
There are plenty of flies to go around, even with hundreds of lizards competing for them.
盡管已有幾百只蜥蜴在此捕獵，這里仍聚集著無數(shù)飛蟲
Away from these rapids, flat lizard populations are found in much smaller numbers.
在遠離這些急流的地方，扁石蜥的數(shù)量則要少得多
But here, one unusual abundance has produced another.
但在這里，一種特別的資源帶動了另一物種的興起。
