的鸟儿

… bird(s)

→ 的
phrase Rare #21,041
… bird(s) 的 links a preceding description or possessor to 鸟儿 (“bird”). The exact English wording depends on what comes before it.
CH: 树上的鸟儿在唱歌。
EN: The birds in the tree are singing.

唱歌的鸟儿

A singing bird

— 智利说不 (2012)

这是乘着气球的鸟儿的舞蹈

This is the dance of the bird riding in a balloon.

— 烈日灼人 (1994)

她去阿巴格纳卖我的鸟儿。

She went to Abagna to sell my bird.

— 甘泉玛侬 (1986)

早起的鸟儿有虫吃。

The early bird catches the worm.

“早起的鸟儿有虫吃”

The early bird catches the worm.

— 怒火青春 (1995)