When a banded bird is recaptured and reported, we learn about its migration route, its growth, and how long it has been alive, its lifespan.

当一只被戴了标记环的鸟被重新捕获时，我们就能从报告中了解其迁徙路线、生长情况以及存活时间、寿命。

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As birders observe new species, they not only learn about different birds, but they also learn about migration, bird behavior, feed preferences, courtship and bird territories.

观鸟者观察各种新的物种，从中他们不止能认识不同的鸟种，还能学到关于迁徙、鸟类行为学、食性、求爱还有鸟类领地的知识。

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Working out bird migration patterns was one of the triumphs of natural history.

找出鸟类迁移规律才是自然学史上无数可嘉可贺的成就之一。

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They want to scrape bits of tissue from planes, discover which birds are most often being struck, and thus work out which bird-migration routes to avoid.

ECONOMIST: Taxonomy

Foie gras has been produced by farmers since the days of ancient Egypt, when farmers discovered that the waterfowl's liver expanded in the days leading up to the bird's planned migration.

CNN: Foie gras causes uproar