評論
打印
視頻出處：
本影片片段來自《非洲》
The lower mandible of their beaks is greatly elongated.
他們的下喙長得非常長
They slice it through the surface of the water at ten metres a second.
他們能以每秒十米的速度劃過水面
If and when it hits a tiny fish, it'll snap shut.
當下喙碰到小魚時 會立刻合上
But why come up river to these open sand flats?
但為何要逆流而上到這片開闊的沙灘來呢
This is the answer.
這就是答案
But this nursery will not exist for long.
但這個托兒所無法長期存在
Four weeks from now, it'll be under ten metres of water.
再過4周 這里會被十米深的河水淹沒
If by then these chicks can't fly, they will drown.
若到那時幼鷗仍不會飛 就會被淹死
The problem for young skimmers is that when they hatch,
幼小的剪嘴鷗在破殼而出時
the lower part of their beaks is the same size as the upper.
他們的下喙跟上喙一樣長
While they wait for it to grow,
等待下喙長長的同時
they do their best to learn the skimming technique.
他們會努力學習捕食技巧
