Most migratory species travel at night, when lights near buildings can distract or disorient them.

大多数候鸟在夜间飞行，那时建筑物附近的灯光会分散它们的注意力或使它们迷失方向。

Birds are also hunted, especially migratory species and ducks that congregate in water bodies.

鸟类也遭到猎杀，尤其是迁徙物种和聚集在水体中的鸭子。

To find out, they made some—starting with the genome of a European robin, which is a migratory species.

为了找到答案，他们做了一些——从欧洲知更鸟的基因组开始，这是一种迁徙物种。

One British birder laments the recent draining of supposedly protected paddies by the Wenyu, a river in Beijing that had been a place of rest for about 200 migratory species.

北京的温榆河最近排干了水田，这里曾是大约200种迁徙物种的栖息之地，对此一位英国观鸟者表示惋惜。