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The alkali fly has special abilities that enable it to live on this lake.
咸水蠅有特殊能力 才能在這片湖泊生存
It can walk underwater to eat algae.
它能走到水底吃海藻
Fine hairs trap air bubbles that prevent it from drowning.
纖細的毛發夾住氣泡 使它不致溺斃
But most critically,
但最大的關鍵
the fly has a physiology that can neutralise the lethal levels of salt.
在于這種蒼蠅的生理機能 可以中和致命的含鹽濃度
So the alkali fly's dominance of Mono Lake goes unchallenged
于是咸水蠅獨霸莫諾湖 所向無敵
except for a few weeks of the year.
每年只有幾個星期例外
100,000 Wilson's phalarope are migrating to South America.
十萬只赤斑瓣蹼鷸 要遷徙到南美洲
Mono Lake is their only stop-over.
莫諾湖是它們唯一的中途站
These alkali flies, for them,
這些咸水蠅對它們而言
are an invaluable and irresistible feast.
是無法抗拒的珍貴饗宴
A fly has no defence, except tofly and become lost in a vast swarm.
蒼蠅沒有防身武器，只能湊空飛起 隱身在大群蒼蠅里
It needs considerable skill to pluck an individual fly from the air.
要從空中抓一只蒼蠅 需要高超的技巧
There are gulls are here, too.
這里也有海鷗
Though their fly-catching techniques are not so refined.
只不過它們 捕蒼蠅的技巧不甚精練
