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The huge variation in temperature between winter and summer presents a challenge to almost all life here.
冬夏氣溫的巨大變化對這里幾乎所有的生命都是挑戰。
The Common Cranes that migrated early lost their eggs to the cold.
冷天氣使早來的灰鶴遭受損失。
But later rival has advantage.
不過，后來者就有了優勢。
Warmer weather means the eggs of this female will have a chance of hatching.
溫暖的天氣讓這只雌鳥的卵有機會孵化。
But life is far from simple for a well-travelled wader.
然而對于見多識廣的涉禽來說生活遠沒有這么簡單。
A patrolling red fox will make short work of any unguarded nest.
正在巡邏的赤狐會輕而易舉地襲擊疏于防范的巢穴。
As if that's not enough, soaring temperatures in the crane's marshland summer home make it a perfect breeding ground for insects.
好像這還遠遠不夠，灰鶴夏天所居的沼澤地氣溫飆升，非常有利于昆蟲繁殖。
If her chicks are going to hatch, she must stay on the nest.
要使雛鳥孵化它得呆在巢上。
That makes her a sitting target for the flies.
這就使它成了蒼蠅的活靶子。
In the north of Iceland, kittiwakes are taking the plunge.
冰島北部一群三趾鷗扎進水中。
With much of their life spent in sea, a fresh water bath is a treat.
它們大部分時間都在海上度過洗個淡水澡應該是一種享受。
Their activities attract unwanted attention.
它們的活動吸引了不速之客的注意。
An Arctic fox family including young with rare white coats.
是北極狐一家，包括一只長著罕見白毛的小狐貍。
Sea birds are a primary source of fresh meat for the foxes.
海鳥是狐貍的主要鮮肉來源。
But the kittiwakes have a pair of bodyguards.
不過三趾鷗們有一對保鏢。
With their nest nearby, Whooper Swans are in no mood to let the foxes past.
大天鵝的巢穴就在附近所以它們可不想讓狐貍過去。
But a fox is nothing if not intrepid.
然而狐貍就是有種堅忍不拔的精神。
