每年秋天，候鸟都会飞往南方。

Every autumn, the migratory bird flies south.

我们在湖边看到了许多候鸟。

We saw many migratory birds by the lake.

这些候鸟在春天返回北方。

These migratory birds return north in the spring.

保护候鸟的栖息地非常重要。

It is very important to protect the habitats of migratory birds.

许多候鸟在夏季飞往北方的地区。

Many migratory birds travel to the boreal zone during the summer.

候鸟的早到是季节变化的预兆。

The early arrival of migratory birds is a harbinger of seasonal change.

候鸟的早到预示着春天的提前到来。

The early arrival of migratory birds boded an early spring.

许多候鸟在迁徙途中会停留在伊利湖。

Many migratory birds stop at Erie during their journey.

候鸟的迁徙是一个奇妙的自然现象。

The migration of migratory birds is a wonderful natural phenomenon.

每年冬天，成千上万的候鸟飞到鄱阳湖过冬。

Every winter, thousands of migratory birds fly to Poyang Lake to spend the winter.