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Red-billed quelea. One and a half billion swarm across the savannahs of Africa.
紅嘴奎利亞雀。以15億的數(shù)量聚集在非洲的稀樹大草原上。
These are the most numerous birds on Earth.
這些鳥是地球上數(shù)量最多的鳥。
Some flocks are so vast that they can take five hours to pass overhead.
這些鳥數(shù)量眾多，讓它們從你的頭頂上飛過要花5個小時。
Only grass can feed plagues of these proportions.
只有草才能滿足這些鳥的胃口
The ravenous hordes devour the seeds.
饑腸轆轆的群鳥貪婪地吞食著草的種子。
And the leaves and stems are cropped by great herds of antelope.
而葉子和莖則被巨大的羚羊群所享受。
The East African savannahs alone sustain nearly two million wildebeest.
僅生活在東非稀樹大草原的角馬就接近兩百萬。
They trim the grass down to its roots, leaving little in their wake,
這些角馬拼命地吃草，把草根上面的草莖部分全部吃掉，
but within days the plant will recover and continue to sustain the biggest herds on Earth.
然而被吃掉的那部分僅在數(shù)天之內就能恢復生長，并繼續(xù)維系著地球上最大的動物群落的食物需要。
