nocturnal migration

例句：

1. 1. Many birds migrate duringthe winter months, traveling long distancesto warmer climates.
   许多鸟类在冬季迁徙，长途跋涉到较温暖的气候中。
2. 2.The nocturnal migration of bats is a fascinating phenomenon that has beenstudied for decades.
   蝙蝠的夜间迁徙现象是一个令人着迷的现象，几十年来一直受到研究。
3. 3. This speciesof bird is known forits nocturnal migrationpatterns, which are unique to thisregion.
   这种鸟类以其夜间迁徙模式而闻名，这是该地区特有的。