The Coa Valley provides a migratory corridor for rare species.

科阿山谷为稀有物种提供了迁徙通道。

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本土鸟产生竞争。

Desert locusts are the world's oldest and most destructive migratory pest.

沙漠蝗虫是世界上最古老和最具破坏性的迁徙害虫。

The manta rays include one species that lives near reefs and another that's migratory.

蝠鲼是包括在其中生活在礁附近的个物种, 而另种则有迁居习惯。

The Coa Valley provides a migratory corridor for rare species.

科阿山谷为稀有物种提供了迁徙通道。

Sharks aren't the only migratory animal that acts as a secret weapon against climate change.

鲨鱼并是唯种作为应气候变化秘密武器的迁徙动物。

Well, because many birds are migratory, they may be transporting mercury far from contaminated sites.

好吧，由于许多鸟类是迁徙的，们可能会将汞运输到远离污染地点的地方。

Temperatures begin to cool and migratory birds set off on their southward journeys.

气温渐凉，候鸟踏上南迁的旅程。

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

在11中旬之前的几个，记录了夜间鸟类迁徙时在空中飞行的叫声。

So researchers analyzed six years of barnacle goose migratory tracking data.

因此，研究人员白颊黑雁六年来的迁徙追踪数据进行了分析。

A more exact count could help salvage a migratory wonder.

更准确的统计可能有助于挽救个迁徙奇迹。

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

每年春天，候鸟都会涌回们繁殖的地方。

They're currently endangered after a big drop in their migratory population.

黑脉金斑蝶目前濒临灭绝，这是由于们迁徙的数量大幅减少。

Duffy-Anderson said large fish are often highly migratory.

达菲-安德森说，大型鱼类通常是高度洄游的。

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们的注意力或使们迷失方向。

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

人们在候鸟的眼睛发现了隐色体。

One of the two flycatcher subspecies is migratory. The other stays put.

两种王霸鶲亚种中，种是迁徙性的。另种则待在原地。

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

北欧地区是数百万候鸟的容身之地。

Their culture has evolved around the migratory needs of the herds.

他们的文化是围绕着鹿群的迁徙需要而发展的。

It has also become a popular stopover for a large number of migratory birds.

同时，很多的候鸟来说，也变成个受欢迎的中转站。