Blind birds fly in circles.

眼瞎的鸟儿转圈飞。

youdao

These birds fly in pairs.

这些鸟成双成对地飞。

youdao

Wings help birds fly.

翅膀帮助鸟飞翔。

youdao

Birds fly south because they know winter is coming.

VOA: special.2009.11.09

And the other part about it is if feathers were twice as heavy, or half as strong, then birds couldn't fly."

VOA: special.2010.06.01

Why,if there was two birds setting on a fence, he would want you to decide which one would fly first so he could win money.

VOA: special.2009.08.29

Unlike shooting partridge in Spain, where the birds fly low due to the landscape, here they are much higher.

WSJ: Scotland's Cawdor Estate

Breeders of homing pigeons have been prevented from letting their birds fly freely.

NPR: China's Bird Flu Response Shows New Openness

According to a 1998 study by Louisiana State University, more than 500 million birds fly over the Gulf and enter the United States along coastal areas in Louisiana and Texas each spring.

CNN: Oil spill could be disaster for animals, experts say