Dial studies living birds called chukars.

戴尔研究了一种被称为“楚卡”存类。

He found that long before they can fly, young chukars use their developing wings to scramble up inclined surfaces to a safe refuge.

，早在能够飞翔之前，年轻楚卡就利用正在育翅膀爬上倾斜表面，到达安全避难所。