They even had an affectionate nickname, " uccelli di passaggio, " birds of passage.

。

It also provides nutrients to millions of migrating birds that can show up on radar.

同时也为数以百万计的提供营养，这可以在雷达上显示。

The warm weather sees the arrival of migrant birds.

也随着温暖的天气回巢。

Another is that they rely on their sense of magnetism.

而其它则认为依赖的是自身对磁场的感知。

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

气温渐凉，踏上南迁的旅程。

And I am the Unalaska Visitor's Bureau executive director.

我是乌拉斯卡办公室的执行董事。

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

大约 20 万只在冬季飞往都昌，11 月是迁徙的高峰期。

The birds that we find are typically neo-tropical migrants.

我们发现的类是典型的新热带。

Migrating birds need to store calories to prepare for their end-of-season trips.

需要储存卡路里，为季末飞行做准备。

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

人们在一的眼睛里发现了隐色体。

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

北欧地区是数百万的容身之地。

To the east of those is the marsh area which attracts a great many migrant birds.

它们的东部是沼泽，这里吸引了许多。

Crows, she says, are what's known as partial migrants.

她说，乌鸦被认为是“部分”。

On top of this, many migrating birds are land-lubbers at heart.

最重要的是，许多本质上是陆。

It turns this remote area into a fascinating paradise for these migrant birds.

成为一座迷人的天堂。

Snowbirds flee northern states in the winter for the South or Southwest.

雪冬天从北部各州逃往南部或西南地区。

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

每年春天，都会涌回它们繁殖的地方。

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

人们喜欢吃，于是它们就从欧洲消失了。

Migrants encounter fewer predators at night.

在夜晚遇到的捕食者较少。

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

同时，逗留时间更长的也可能对一本土产生竞争。