6 sentences

1. 头顶上，鸟儿正在迁徙。

   tóu​dǐng shàng, niǎo​r zhèng​zài qiān​xǐ.

   Overhead, birds are migrating.

   Source: OpenSubtitles

2. 明天就要迁徙了。

   míng​tiān jiù yào qiān​xǐ le.

   The migration's tomorrow.

   Source: OpenSubtitles

3. 候鸟在迁徙过程中会飞越数千公里。

   hòu​niǎo zài qiān​xǐ guò​chéng zhōng huì fēi​yuè shù​qiān gōng​lǐ.

   Migratory birds fly over thousands of kilometers during their migration.

   Source: Dong Chinese Dictionary

4. 这种鸟类在迁徙季节通常会集群飞行。

   zhè zhǒng niǎo​lèi zài qiān​xǐ jì​jié tōng​cháng huì jí​qún fēi​xíng.

   This species of bird usually flies in flocks during migration season.

   Source: Dong Chinese Dictionary

5. 每年秋天，成千上万的候鸟会向南迁徙。

   měi nián qiū​tiān, chéng​qiān​shàng​wàn de hòu​niǎo huì xiàng nán qiān​xǐ.

   Every autumn, thousands of migratory birds migrate south.

   Source: Dong Chinese Dictionary

6. 史书详细记载了古代氐族在中国北方的迁徙历史。

   shǐ​shū xiáng​xì jì​zǎi le gǔ​dài Dī​zú zài Zhōng​guó běi​fāng de qiān​xǐ lì​shǐ.

   Historical records provide a detailed account of the migration history of the ancient Di people in northern China.

   Source: Dong Chinese Dictionary