qì / wēn / xià / jiàng / hòu / zhè / xiē / niǎo / kāi / shǐ / qiān / fēi / xún / zhǎo / wēn / nuǎn / de / qī / xī / dì

气温下降后，这些鸟开始迁飞，寻找温暖的栖息地。

After the temperature dropped, these birds began migrating in search of warmer habitats.