In spring, caterpillars time their emergence to coincide with the bud burst of trees; birds start nesting when they can feed those newly emerged caterpillars to their fledglings.

春天，毛毛虫的出现时间和树木的萌芽一致；鸟儿开始筑巢的时间要跟毛虫出现的时间吻合，用来哺育幼鸟。

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Unlike nesting birds, penguin parents actually spend very little time together.

不同于筑巢的鸟类，企鹅实家长们际上在一起共同的时光很短。

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The Gulf of Mexico oil spill comes at an especially bad time for sea turtles, which are entering their spring nesting season.

对于海龟来说，墨西哥湾石油泄漏来得最不是时候。因为它们正在进入春季孵卵期。

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Park managers said they could not have come at a worst time, affecting nesting birds and wildlife.

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But April and May are an especially magical time to visit as this is when great blue herons and great egrets are nesting and harbour seals are giving birth to pups.

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