Every spring, migratory birds flood back to where they breed.

每年春天，候鸟都会涌回它们繁殖的地方。

Cryptochrome has been found in the eyes of several migratory birds.

人们在一些候鸟的眼睛里发现了隐色体。

The Nordic countries provide a home to millions of migratory birds.

北欧地区是数百万候鸟的容身地。

And migratory birds that extend their visits may provide competition for some avian natives.

同时，逗留时间更长的候鸟也可能对一些本土鸟产生竞争。

For several months until mid-November it recorded the night-time calls of migratory birds flying above.

在11月前的几个月里，它记录了夜间鸟类迁徙时在空飞的叫声。

The wetlands near the head of the canyon are an important wintering site for many migratory birds.

大峡谷起点附近的雅江湿地是许多候鸟的冬地。

Migratory bird shuttling between the Chinese mainland and South Pacific Islands use the site as a rest stop.

而来往于国大陆和南太平洋岛屿间的候鸟便将这个岛屿当成了休息的驿站。

Some 200,000 migratory birds fly to Duchang during winter, with the peak migratory season falling in November.

大约 20 万只候鸟在冬季飞往都昌，11 月是候鸟迁徙的高峰期。

These migratory birds traveled South from Northern states and Canadian provinces when migrating, but overhunting made them increasingly rare.

这些候鸟从北部各州和加拿大各省迁徙到南方，但过度捕猎使它们来少。

More habitats for migratory birds are appearing as the environment improves, added Li in an interview with China Daily.

李志军在接受《国日报》采访时补充说，随着环境的改善，候鸟的栖息地来多。

The upshot: it may be more difficult than we thought to predict the effects of climate change on migratory birds.

预测气候变化对候鸟的影响，可能比我们想象得困难得多。

Most migratory birds spend their winters in one habitat and then fly to a new area in the springtime to breed.

大多数候鸟在一个栖息地过冬，然后在春天飞往另一个地方繁殖。

Here you can observe migratory birds, turtles And lizards.

在这里您可以观察候鸟、海龟和蜥蜴。

This Nature Reserve is inhabited by hundreds of migratory birds.

这个自然保护区栖息着数百只候鸟。

Or, if they’re migratory birds, they can be blown hundreds of kilometers off course.

或者，如果它们是候鸟， 它们可能会被吹离航线数百公里。

It is amazing to find so strong a home instinct in wild and migratory birds.

在野生鸟类和候鸟发现如此强烈的归巢本能真是令人惊奇。

And Scientists have found the European nightjars, migratory birds, that travel between Europe and Africa, feed twice as much than moon-lit night.

科学家发现，欧夜鹰这类在欧洲和非洲间迁徙的候鸟平时的食量是月夜的两倍。

But also that scale is shrinking as migratory bird populations decline to record low numbers.

但随着候鸟数量下降至历史新低，这一规模也在缩小。

Up to a million migratory birds visit these shores on their way to Arctic nesting grounds.

多达一百万只候鸟在前往北极筑巢地的途造访这些海岸。

Think about migratory birds that rely on wind currents, or plants that depend on the wind for seed dispersal.

想想依靠风流的候鸟，或者依靠风传播种子的植物。