公园里的树上有好多鸟在唱歌。

gōngyuán lǐ de shù shàng yǒu hǎoduō niǎo zài chànggē.

There are many birds singing in the trees in the park.

这种鸟只在冬天才飞到南方来。

zhè zhǒng niǎo zhǐ zài dōngtiān cái fēi dào nánfāng lái.

This kind of bird only flies south in winter.

早上被窗外的鸟叫声吵醒了。

zǎoshang bèi chuāngwài de niǎo jiàoshēng chǎoxǐng le.

I was woken up by the sound of birds outside the window in the morning.