Studies of living birds, like chukar partridges, have shown that birds can get a better grip on inclined surfaces, like tree trunks and rocks, when they flap their wings as they run.

对 chukar 鹧鸪等现存鸟类的研究表明，鸟类在奔跑时拍打翅膀可以更好地抓住倾斜的表面，例如树干和岩石。