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

同时，逗留时间更长候也可能对一些本土产生竞争。

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

气温渐凉，候踏上南迁旅程。

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

在11月中旬之前几个月里，它记录了夜间类迁徙时在空中飞行叫声。

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

每年春天，候都会涌回它们繁殖地方。

People liked eating the migratory birds, and they disappeared from Europe.

人们喜欢吃候，它们就从欧洲消失了。

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

人们在一些候睛里发现了隐色体。

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

北欧地区数百万候容身之地。

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

但随着候数量下降至历史低点，迁徙规模也在缩水。

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

同时，对很多候来说，它也变成一个受欢迎中转站。

If you want to help protect migratory birds, go to BirdCast.

如果您想帮助保护候，请访问 BirdCast。

Migratory birds navigate to their summer and winter homes by way of the moon and stars.

候通过月亮和星星指引飞往夏季和冬季家园。

Fritz said the group's work is the first attempt to reintroduce a continentally extinct migratory bird species.

弗里茨说，该小组工作首次尝试重新引入大陆灭绝候物种。

So the thought that people would make a connection between light pollution and migratory birds seems unlikely.

因此，人们似乎不太可能把光污染和候联系起来。

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

大约 20 万只候在冬季飞往都昌，11 月候迁徙高峰期。

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

大峡谷起点附近雅江湿地许多候重要越冬地。

Every Spring and Autumn, nearly 3 million migratory birds around the world stop here to replenish themselves.

每个春天和秋天，全世界将近三百万迁徙儿停驻在这里，为自己补充能量。

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

而来往中国大陆和南太平洋岛屿间候便将这个岛屿当成了休息驿站。

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

这些候从北部各州和加拿大各省迁徙到南方，但过度捕猎使它们越来越少。

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《中国日报》采访时补充说，随着环境改善，候栖息地越来越多。

This creates valuable habitats for millions of migratory birds and endangered species that prefer not to be disturbed.

这为数百万候们和不愿被打扰濒临灭绝物种们，创造了宝贵环境。